1 Change log file for Exim from version 4.21
2 ------------------------------------------
3 This document describes *changes* to previous versions, that might
4 affect Exim's operation, with an unchanged configuration file. For new
5 options, and new features, see the NewStuff file next to this ChangeLog.
11 JH/01 Remove code calling the customisable local_scan function, unless a new
12 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
14 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
15 non-signal-safe functions being used.
17 JH/03 Bug 2269: When presented with a received message having a stupidly large
18 number of DKIM-Signature headers, disable DKIM verification to avoid
19 a resource-consumption attack. The limit is set at twenty.
25 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
26 When redis_servers is set to a list of > 1 element, and the Redis servers
27 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
28 case of MOVED into a DEFER case instead, thus moving the query onto the
29 next server in the list. For a cluster of N elements, all N servers must
30 be defined in redis_servers.
32 GF/02 Catch and remove uninitialized value warning in exiqsumm
33 Check for existence of @ARGV before looking at $ARGV[0]
35 JH/01 Replace the store_release() internal interface with store_newblock(),
36 which internalises the check required to safely use the old one, plus
37 the allocate and data copy operations duplicated in both (!) of the
40 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
41 modifier. This matches the restriction on the commandline.
43 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
44 Previously only the last row was returned.
46 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
47 we assumed that tags in the header were well-formed, and parsed the
48 element content after inspecting only the first char of the tag.
49 Assumptions at that stage could crash the receive process on malformed
52 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
53 While running the DKIM ACL we operate on the Permanent memory pool so that
54 variables created with "set" persist to the DATA ACL. Also (at any time)
55 DNS lookups that fail create cache records using the Permanent pool. But
56 expansions release any allocations made on the current pool - so a dnsdb
57 lookup expansion done in the DKIM ACL releases the memory used for the
58 DNS negative-cache, and bad things result. Solution is to switch to the
59 Main pool for expansions.
60 While we're in that code, add checks on the DNS cache during store_reset,
61 active in the testsuite.
62 Problem spotted, and debugging aided, by Wolfgang Breyha.
64 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
65 When none of the hosts presented to a transport match an already-open
66 connection, close it and proceed with the list. Previously we would
67 queue the message. Spotted by Lena with Yahoo, probably involving
70 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
71 Previously a spurious "250 OK id=" response was appended to the proper
74 JH/08 The "support for" informational output now, which built with Content
75 Scanning support, has a line for the malware scanner interfaces compiled
76 in. Interface can be individually included or not at build time.
78 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
79 by the template makefile "src/EDITME". The "STREAM" support for an older
80 ClamAV interface method is removed.
82 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
83 rows affected is given instead).
85 JH/11 The runtime Berkeley DB library version is now additionally output by
86 "exim -d -bV". Previously only the compile-time version was shown.
88 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
89 SMTP connection. Previously, when one had more receipients than the
90 first, an abortive onward connection was made. Move to full support for
91 multiple onward connections in sequence, handling cutthrough connection
92 for all multi-message initiating connections.
94 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
95 routers. Previously, a multi-recipient message would fail to match the
96 onward-connection opened for the first recipient, and cause its closure.
98 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
99 a timeout on read on a GnuTLS initiating connection, resulting in the
100 initiating connection being dropped. This mattered most when the callout
101 was marked defer_ok. Fix to keep the two timeout-detection methods
104 JH/15 Relax results from ACL control request to enable cutthrough, in
105 unsupported situations, from error to silently (except under debug)
106 ignoring. This covers use with PRDR, frozen messages, queue-only and
109 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
111 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
112 metadata, resulting in a crash in free().
114 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
115 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
116 Broken also in d185889f4, with init system revamp.
118 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
119 Previously we abruptly closed the connection after reading a malware-
120 found indication; now we go on to read the "scan ok" response line,
123 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
124 ACL. Previously, a crash would result.
126 JH/19 Speed up macro lookups during configuration file read, by skipping non-
127 macro text after a replacement (previously it was only once per line) and
128 by skipping builtin macros when searching for an uppercase lead character.
130 JH/20 DANE support moved from Experimental to mainline. The Makefile control
131 for the build is renamed.
133 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
134 was allocated for every new TLS startup, meaning one per message. Fix
135 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
137 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
138 reported the original. Fix to report (as far as possible) the ACL
139 result replacing the original.
141 JH/23 Fix memory leak during multi-message connections using STARTTLS under
142 OpenSSL. Certificate information is loaded for every new TLS startup,
143 and the resources needed to be freed.
145 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
147 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
150 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
151 DATA response info to the (existing) per-recipient response info for
152 the "C=" log element. It can have useful tracking info from the
153 destination system. Patch from Simon Arlott.
155 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
156 length value. Previously this would segfault.
158 HS/02 Support Avast multiline protoocol, this allows passing flags to
159 newer versions of the scanner.
161 JH/28 Ensure that variables possibly set during message acceptance are marked
162 dead before release of memory in the daemon loop. This stops complaints
163 about them when the debug_store option is enabled. Discovered specifically
164 for sender_rate_period, but applies to a whole set of variables.
165 Do the same for the queue-runner and queue-list loops, for variables set
166 from spool message files. Do the same for the SMTP per-message loop, for
167 certain variables indirectly set in ACL operations.
169 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
170 as a multi-recipient message from a mailinglist manager). The coding had
171 an arbitrary cutoff number of characters while checking for more input;
172 enforced by writing a NUL into the buffer. This corrupted long / fast
173 input. The problem was exposed more widely when more pipelineing of SMTP
174 responses was introduced, and one Exim system was feeding another.
175 The symptom is log complaints of SMTP syntax error (NUL chars) on the
176 receiving system, and refused recipients seen by the sending system
177 (propating to people being dropped from mailing lists).
178 Discovered and pinpointed by David Carter.
180 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
181 replaced by the ${authresults } expansion.
183 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
185 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
186 allows proper process termination in container environments.
188 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
189 Previously the "final dot" had a newline after it; ensure it is CR,LF.
191 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
192 and "err_perm", deprecated since 4.83 when the RFC-defined words
193 "temperror" and "permerror" were introduced.
195 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
196 transport-filters or DKIM-signing. The restriction was lost in the
197 consolidation of verify-callout and delivery SMTP handling.
198 Extend the restriction to also cover ARC-signing.
200 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
201 in defer=pass mode supply a 450 to the initiator. Previously the message
204 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
205 tls_require_ciphers is used as before.
207 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
208 "pass_unscanned". Only tmpfails from the scanner are written to
209 the paniclog, as they may require admin intervention (permission
210 denied, license issues). Other scanner errors (like decompression
211 bombs) do not cause a paniclog entry.
213 JH/36 Fix reinitialisation of DKIM logging variable between messages.
214 Previously it was possible to log spurious information in receive log
217 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
218 triggered odd behaviour from Outlook Express clients.
220 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
223 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
224 since the IETF WG has not yet settled on that versus the original
225 "bare" representation.
227 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
228 Previously the millisecond value corrupted the output.
229 Fix also for syslog_pid=no and log_selector +pid, for which the pid
230 corrupted the output.
236 JH/01 Rework error string handling in TLS interface so that the caller in
237 more cases is responsible for logging. This permits library-sourced
238 string to be attached to addresses during delivery, and collapses
239 pairs of long lines into single ones.
241 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
242 during configuration. Wildcards are allowed and expanded.
244 JH/02 Rework error string handling in DKIM to pass more info back to callers.
245 This permits better logging.
247 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
248 do not close it down and have the child transport start it up again on
249 the passed-on TCP connection. Instead, proxy the child (and any
250 subsequent ones) for TLS via a unix-domain socket channel. Logging is
251 affected: the continued delivery log lines do not have any DNSSEC, TLS
252 Certificate or OCSP information. TLS cipher information is still logged.
254 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
255 identical IP addresses on different listening ports. Will also affect
258 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
259 add noisy ifdef guards to special-case this sillyness.
260 Patch from Bernd Kuhls.
262 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
263 than 255 are no longer allowed.
265 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
266 Disable the session-cache too, which might reduce our load. Since we
267 currrectly use a new context for every connection, both as server and
268 client, there is no benefit for these.
269 GnuTLS appears to not support tickets server-side by default (we don't
270 call gnutls_session_ticket_enable_server()) but client side is enabled
271 by default on recent versions (3.1.3 +) unless the PFS priority string
274 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
275 <https://reproducible-builds.org/specs/source-date-epoch/>.
277 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
278 the check for any unsuccessful recipients did not notice the limit, and
279 erroneously found still-pending ones.
281 JH/08 Pipeline CHUNKING command and data together, on kernels that support
282 MSG_MORE. Only in-clear (not on TLS connections).
284 JH/09 Avoid using a temporary file during transport using dkim. Unless a
285 transport-filter is involved we can buffer the headers in memory for
286 creating the signature, and read the spool data file once for the
287 signature and again for transmission.
289 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
290 4.77 as the kernel support then wasn't solid, having issues in 64bit
291 mode. Now, it's been long enough. Add support for FreeBSD also.
293 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
294 case where the routing stage had gathered several addresses to send to
295 a host before calling the transport for the first, we previously failed
296 to close down TLS in the old transport process before passing the TCP
297 connection to the new process. The new one sent a STARTTLS command
298 which naturally failed, giving a failed delivery and bloating the retry
299 database. Investigation and fix prototype from Wolfgang Breyha.
301 JH/12 Fix check on SMTP command input synchronisation. Previously there were
302 false-negatives in the check that the sender had not preempted a response
303 or prompt from Exim (running as a server), due to that code's lack of
304 awareness of the SMTP input buffering.
306 PP/04 Add commandline_checks_require_admin option.
307 Exim drops privileges sanely, various checks such as -be aren't a
308 security problem, as long as you trust local users with access to their
309 own account. When invoked by services which pass untrusted data to
310 Exim, this might be an issue. Set this option in main configuration
311 AND make fixes to the calling application, such as using `--` to stop
314 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
315 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
316 responses to those, into a single TLS record each way (this usually means
317 a single packet). As a side issue, smtp_enforce_sync now works on TLS
320 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
321 affects you only if you're dancing at the edge of the param size limits.
322 If you are, and this message makes sense to you, then: raise the
323 configured limit or use OpenSSL 1.1. Nothing we can do for older
326 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
327 cmdline element to get the documented default one. Previously it was
330 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
331 are unsuable for non-message-specific reasons - eg. connection timeout,
332 banner-time rejection.
334 JH/16 Fix logging of delivery remote port, when specified by router, under
337 PP/06 Repair manualroute's ability to take options in any order, even if one
338 is the name of a transport.
341 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
343 JH/17 Change the list-building routines interface to use the expanding-string
344 triplet model, for better allocation and copying behaviour.
346 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
347 Previously it was constructed the first time a possibly-matching string
348 was met in the configuration file input during startup; now it is done
351 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
352 compatible one, to avoid the (poorly documented) possibility of a config
353 file in the working directory redirecting the DB files, possibly correpting
354 some existing file. CVE-2017-10140 assigned for BDB.
356 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
357 cache-hot. Previously, although the result was properly cached, the
358 initial verify call returned a defer.
360 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
361 the main verify for receipient in uncached-mode.
363 JH/22 Retire historical build files to an "unsupported" subdir. These are
364 defined as "ones for which we have no current evidence of testing".
366 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
367 if present. Previously it was ignored.
369 JH/24 Start using specified-initialisers in C structure init coding. This is
370 a C99 feature (it's 2017, so now considered safe).
372 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
373 if was a fixed-sized field and bitmask ops via macros; it is now more
376 PP/07 GitHub PR 56: Apply MariaDB build fix.
377 Patch provided by Jaroslav Škarvada.
379 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
380 during Coverity cleanups [4.87 JH/47]
381 Diagnosis and fix provided by Michael Fischer v. Mollard.
383 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
384 the right size to place the terminating semicolon on its own folded
385 line, the header hash was calculated to an incorrect value thanks to
386 the (relaxed) space the fold became.
388 HS/02 Fix Bug 2130: large writes from the transport subprocess where chunked
389 and confused the parent.
391 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
392 which could crash as a result. This could lead to undeliverable messages.
394 JH/28 Logging: "next input sent too soon" now shows where input was truncated
397 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
398 matters on fast-turnover and PID-randomising systems, which were getting
399 out-of-order delivery.
401 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
402 a possibly-overlapping copy. The symptom was that "Remote host closed
403 connection in response to HELO" was logged instead of the actual 4xx
406 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
407 Previously only that bufferd was discarded, resulting in SYMTP command
410 JH/32 DKIM: when a message has multiple signatures matching an identity given
411 in dkim_verify_signers, run the dkim acl once for each. Previously only
412 one run was done. Bug 2189.
414 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
415 "panic the current process" to "deliberately defer". The panic log is
416 still written with the problem list name; the mail and reject logs now
417 get a temp-reject line for the message that was being handled, saying
418 something like "domains check lookup or other defer". The SMTP 451
419 message is still "Temporary local problem".
421 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
422 A crafted sequence of BDAT commands could result in in-use memory beeing
423 freed. CVE-2017-16943.
425 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
426 from SMTP input. Previously it was always done; now only done for DATA
427 and not BDAT commands. CVE-2017-16944.
429 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
430 to the message (such as an overlong header line). Previously this was
431 not done and we did not exit BDAT mode. Followon from the previous item
432 though a different problem.
438 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
439 than -2003 did; needs libidn2 in addition to libidn.
441 JH/02 The path option on a pipe transport is now expanded before use.
443 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
444 Patch provided by "Björn", documentation fix added too.
446 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
447 missing a wire-to-host endian conversion.
449 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
450 close after a BDAT command line could be taken as a following command,
451 giving a synch failure. Fix by only checking for synch immediately
452 before acknowledging the chunk.
454 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
455 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
456 macro. Patches provided by Josh Soref.
458 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
459 Previously we did not; the RFC seems ambiguous and VRFY is not listed
460 by IANA as a service extension. However, John Klensin suggests that we
463 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
464 the dkim code may be unix-mode line endings rather than smtp wire-format
465 CRLF, so prepend a CR to any bare LF.
467 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
468 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
470 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
471 the first were themselves being wrongly included in the feed into dkim
472 processing; with most chunk sizes in use this resulted in an incorrect
473 body hash calculated value.
475 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
476 DKIM signature block, for verification. Although advised against by
477 standards it is specifically not ruled illegal.
479 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
481 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
482 missing a body hash (the bh= tag).
484 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
485 It seems that HAProxy sends the Proxy Protocol information in clear and
486 only then does a TLS startup, so do the same.
488 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
489 TCP connections (such as for Spamd) unless the daemon successfully set
490 Fast Open mode on its listening sockets. This fixes breakage seen on
491 too-old kernels or those not configured for Fast Open, at the cost of
492 requiring both directions being enabled for TFO, and TFO never being used
493 by non-daemon-related Exim processes.
495 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
496 endings, at least on the first header line. Try to canonify any that get
497 past that check, despite the cost.
499 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
500 now limited to an arbitrary five deep, while parsing addresses with the
501 strip_excess_angle_brackets option enabled.
503 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
504 instead leave the unprompted TLS handshake in socket buffer for the
505 TLS library to consume.
507 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
509 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
511 JH/16 Drop variables when they go out of scope. Memory management drops a whole
512 region in one operation, for speed, and this leaves assigned pointers
513 dangling. Add checks run only under the testsuite which checks all
514 variables at a store-reset and panics on a dangling pointer; add code
515 explicitly nulling out all the variables discovered. Fixes one known
516 bug: a transport crash, where a dangling pointer for $sending_ip_address
517 originally assigned in a verify callout, is re-used.
519 PP/06 Drop '.' from @INC in various Perl scripts.
521 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
523 PP/08 Reduce a number of compilation warnings under clang; building with
524 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
525 should be warning-free.
527 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
529 HS/01 Fix portability problems introduced by PP/08 for platforms where
530 realloc(NULL) is not equivalent to malloc() [SunOS et al].
532 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
533 chunk. This allows us to accept broken chunked messages. We need a more
534 general solution here.
536 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
537 already-broken messages in the queue.
539 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
541 JH/19 Fix reference counting bug in routing-generated-address tracking.
547 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
548 supports it and a size is available (ie. the sending peer gave us one).
550 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
551 years of being deprecated). The replacements are the ACLs
552 acl_smtp_mime and acl_not_smtp_mime.
554 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
555 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
556 or even an in-clear connection were permitted. Now, if the host lookup
557 was dnssec and dane was requested then the host is only used if the
558 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
559 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
560 if one fails this test.
561 This means that a poorly-configured remote DNS will make it incommunicado;
562 but it protects against a DNS-interception attack on it.
564 JH/04 Bug 1810: make continued-use of an open smtp transport connection
565 non-noisy when a race steals the message being considered.
567 JH/05 If main configuration option tls_certificate is unset, generate a
568 self-signed certificate for inbound TLS connections.
570 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
571 in rewrites and routers.
573 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
574 and logged a warning sing 4.83; now they are a configuration file error.
576 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
577 (lacking @domain). Apply the same qualification processing as RCPT.
579 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
581 JH/10 Support ${sha256:} applied to a string (as well as the previous
584 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
585 a cutthrough deliver is pending, as we always want to make a connection.
586 This also avoids re-routing the message when later placing the cutthrough
587 connection after a verify cache hit.
588 Do not update it with the verify result either.
590 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
591 when routing results in more than one destination address.
593 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
594 signing (which inhibits the cutthrough capability). Previously only
595 the presence of an option was tested; now an expansion evaluating as
596 empty is permissible (obviously it should depend only on data available
597 when the cutthrough connection is made).
599 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
600 the relevant preceding SMTP command did not note the pipelining mode.
602 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
603 Previously they were not counted.
605 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
606 as one having no matching records. Previously we deferred the message
607 that needed the lookup.
609 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
610 distinguished as "(=".
612 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
613 for missing MX records. Previously it only worked for missing A records.
615 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
617 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
618 after the data-go-ahead and data-ack. Patch from Jason Betts.
620 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
621 even for a "none" policy. Patch from Tony Meyer.
623 JH/22 Fix continued use of a connection for further deliveries. If a port was
624 specified by a router, it must also match for the delivery to be
627 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
628 When one of the recipients of a message was unsuitable for the connection
629 (has no matching addresses), we lost track of needing to mark it
630 deferred. As a result mail would be lost.
632 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
634 JH/25 Decoding ACL controls is now done using a binary search; the source code
635 takes up less space and should be simpler to maintain. Merge the ACL
636 condition decode tables also, with similar effect.
638 JH/26 Fix problem with one_time used on a redirect router which returned the
639 parent address unchanged. A retry would see the parent address marked as
640 delivered, so not attempt the (identical) child. As a result mail would
643 JH/27 Fix a possible security hole, wherein a process operating with the Exim
644 UID can gain a root shell. Credit to http://www.halfdog.net/ for
645 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
648 JH/28 Enable {spool,log} filesystem space and inode checks as default.
649 Main config options check_{log,spool}_{inodes,space} are now
650 100 inodes, 10MB unless set otherwise in the configuration.
652 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
653 Previously it only applied to the main-section connection policy
656 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
658 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
659 by me. Added RFC7919 DH primes as an alternative.
661 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
662 are not in the system include path.
664 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
665 GnuTLS, when a session startup failed (eg because the client disconnected)
666 Exim did stdio operations after fclose. This was exposed by a recent
667 change which nulled out the file handle after the fclose.
669 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
670 signed directly by the cert-signing cert, rather than an intermediate
671 OCSP-signing cert. This is the model used by LetsEncrypt.
673 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
675 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
676 an incoming connection.
678 HS/02 Bug 1802: Do not half-close the connection after sending a request
681 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
682 fallback to "prime256v1".
684 JH/34 SECURITY: Use proper copy of DATA command in error message.
685 Could leak key material. Remotely exploitable. CVE-2016-9963.
691 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
692 and 3.4.4 - once the server is enabled to respond to an OCSP request
693 it does even when not requested, resulting in a stapling non-aware
694 client dropping the TLS connection.
696 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
697 support variable-length bit vectors. No functional change.
699 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
700 The I= interface field on outgoing lines is now after the H= remote
701 host field, same as incoming lines. There is a separate
702 outgoing_interface log selector which allows you to disable the
705 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
706 If not running log_selector +smtp_connection the mainlog would be held
707 open indefinitely after a "too many connections" event, including to a
708 deleted file after a log rotate. Leave the per net connection logging
709 leaving it open for efficiency as that will be quickly detected by the
710 check on the next write.
712 HS/01 Bug 1671: Fix post transport crash.
713 Processing the wait-<transport> messages could crash the delivery
714 process if the message IDs didn't exist for some reason. When
715 using 'split_spool_directory=yes' the construction of the spool
716 file name failed already, exposing the same netto behaviour.
718 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
719 mime_regex ACL conditions.
721 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
722 to DSN fail messages (bounces): remote IP, remote greeting, remote response
723 to HELO, local diagnostic string.
725 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
726 log line to debug. Even when configured with a tls authenticator many
727 client connections are expected to not authenticate in this way, so
728 an authenticate fail is not an error.
730 HS/02 Add the Exim version string to the process info. This way exiwhat
731 gives some more detail about the running daemon.
733 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
734 matter for fast-change records such as DNSBLs.
736 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
737 retry record, even if constant. There may be multiple transports with
738 different interface settings and the retry behaviour needs to be kept
741 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
743 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
745 JH/10 Bug 840: fix log_defer_output option of pipe transport
747 JH/11 Bug 830: use same host for all RCPTS of a message, even under
748 hosts_randomize. This matters a lot when combined with mua_wrapper.
750 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
751 ${quote_pgsql:<string>} operator.
753 JH/13 Bug 1708: avoid misaligned access in cached lookup.
755 JH/14 Change header file name for freeradius-client. Relevant if compiling
756 with Radius support; from the Gentoo tree and checked under Fedora.
758 JH/15 Bug 1712: Introduce $prdr_requested flag variable
760 JH/16 Bug 1714: Permit an empty string as expansion result for transport
761 option transport_filter, meaning no filtering.
763 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
765 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
766 defaults to "*" (all hosts). The variable is now available when not built
767 with TLS, default unset, mainly to enable keeping the testsuite sane.
768 If a server certificate is not supplied (via tls_certificate) an error is
769 logged, and clients will find TLS connections fail on startup. Presumably
770 they will retry in-clear.
771 Packagers of Exim are strongly encouraged to create a server certificate
772 at installation time.
774 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
775 with the $config_file variable.
777 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
778 in transport context, after the attempt, and per-recipient. The latter type
779 is per host attempted. The event data is the error message, and the errno
780 information encodes the lookup type (A vs. MX) used for the (first) host,
781 and the trailing two digits of the smtp 4xx response.
783 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
784 to write to mainlog (or rejectlog, paniclog) in the window between file
785 creation and permissions/ownership being changed. Particularly affects
786 installations where exicyclog is run as root, rather than exim user;
787 result is that the running daemon panics and dies.
789 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
791 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
792 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
793 "pri" and "weight". Note that the previous implicit priority given by the
794 list order is no longer honoured.
796 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
799 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
800 by defining SUPPORT_SOCKS.
802 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
803 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
804 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
805 variables are renamed to proxy_{local,external}_{address,port}.
807 JH/27 Move Internationalisation support from Experimental to mainline, enabled
808 for a build by defining SUPPORT_I18N
810 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
811 of the query string, and make ${quote_redis:} do that quoting.
813 JH/29 Move Events support from Experimental to mainline, enabled by default
814 and removable for a build by defining DISABLE_EVENT.
816 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
818 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
819 cached by the daemon.
821 JH/32 Move Redis support from Experimental to mainline, enabled for a build
822 by defining LOOKUP_REDIS. The libhiredis library is required.
824 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
825 keys are given for lookup.
827 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
828 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
829 only supported when built with TLS support. The PolarSSL SHA routines
830 are still used when the TLS library is too old for convenient support.
832 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
833 openssl_options), for security. OpenSSL forces this from version 1.1.0
834 server-side so match that on older versions.
836 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
837 allocation for $value could be released as the expansion processing
838 concluded, but leaving the global pointer active for it.
840 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
841 and to use the domains and local_parts ACL conditions.
843 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
844 incorrectly not doubled on cutthrough transmission, hence seen as a
845 body-termination at the receiving system - resulting in truncated mails.
846 Commonly the sender saw a TCP-level error, and retransmitted the message
847 via the normal store-and-forward channel. This could result in duplicates
848 received - but deduplicating mailstores were liable to retain only the
849 initial truncated version.
851 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
853 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
855 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
856 we're in there, support oversigning also; bug 1309.
858 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
860 HS/04 Add support for keep_environment and add_environment options.
862 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
863 either intentional arithmetic overflow during PRNG, or testing config-
866 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
867 delivery resulted in actual delivery. Cancel cutthrough before DATA
870 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
871 rejects a recipient: pass the reject to the originator.
873 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
874 Many were false-positives and ignorable, but it's worth fixing the
877 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
878 for the new environment-manipulation done at startup. Move the routines
879 from being local to tls.c to being global via the os.c file.
881 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
882 an extract embedded as result-arg for a map, the first arg for extract
883 is unavailable so we cannot tell if this is a numbered or keyed
884 extraction. Accept either.
890 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
893 JH/02 The smtp transport option "multi_domain" is now expanded.
895 JH/03 The smtp transport now requests PRDR by default, if the server offers
898 JH/04 Certificate name checking on server certificates, when exim is a client,
899 is now done by default. The transport option tls_verify_cert_hostnames
900 can be used to disable this per-host. The build option
901 EXPERIMENTAL_CERTNAMES is withdrawn.
903 JH/05 The value of the tls_verify_certificates smtp transport and main options
904 default to the word "system" to access the system default CA bundle.
905 For GnuTLS, only version 3.0.20 or later.
907 JH/06 Verification of the server certificate for a TLS connection is now tried
908 (but not required) by default. The verification status is now logged by
909 default, for both outbound TLS and client-certificate supplying inbound
912 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
915 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
916 Status Notification (bounce) messages are now MIME format per RFC 3464.
917 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
918 under the control of the dsn_advertise_hosts option, and routers may
919 have a dsn_lasthop option.
921 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
922 default, modifiable by a malware= option. The list separator for
923 the options can now be changed in the usual way. Bug 68.
925 JH/10 The smtp_receive_timeout main option is now expanded before use.
927 JH/11 The incoming_interface log option now also enables logging of the
928 local interface on delivery outgoing connections.
930 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
931 if the interface and destination host and port all match.
933 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
936 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
937 Patch from Andrew Lewis.
939 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
940 now supports optional time-restrictions, weighting, and priority
941 modifiers per server. Patch originally by <rommer@active.by>.
943 JH/16 The spamd_address main option now supports a mixed list of local
944 and remote servers. Remote servers can be IPv6 addresses, and
945 specify a port-range.
947 JH/17 Bug 68: The spamd_address main option now supports an optional
948 timeout value per server.
950 JH/18 Bug 1581: Router and transport options headers_add/remove can
951 now have the list separator specified.
953 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
956 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
959 JH/21 Support for the A6 type of dns record is withdrawn.
961 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
962 rather than the verbs used.
964 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
965 from 255 to 1024 chars.
967 JH/24 Verification callouts now attempt to use TLS by default.
969 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
970 are generic router options now. The defaults didn't change.
972 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
973 Original patch from Alexander Shikoff, worked over by JH.
975 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
976 files if ZCAT_COMMAND is not executable.
978 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
980 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
982 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
983 Normally benign, it bites when the pair was led to by a CNAME;
984 modern usage is to not canonicalize the domain to a CNAME target
985 (and we were inconsistent anyway for A-only vs AAAA+A).
987 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
989 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
990 when evaluating $sender_host_dnssec.
992 JH/31 Check the HELO verification lookup for DNSSEC, adding new
993 $sender_helo_dnssec variable.
995 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
997 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
999 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1001 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1002 documented as working, but never had. Support all but $spam_report.
1004 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1005 added for tls authenticator.
1007 HS/03 Add perl_taintmode main config option
1013 TL/01 When running the test suite, the README says that variables such as
1014 no_msglog_check are global and can be placed anywhere in a specific
1015 test's script, however it was observed that placement needed to be near
1016 the beginning for it to behave that way. Changed the runtest perl
1017 script to read through the entire script once to detect and set these
1018 variables, reset to the beginning of the script, and then run through
1019 the script parsing/test process like normal.
1021 TL/02 The BSD's have an arc4random API. One of the functions to induce
1022 adding randomness was arc4random_stir(), but it has been removed in
1023 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1024 function when detected.
1026 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1027 cause callback expansion.
1029 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1030 syntax errors in an expansion can be treated as a string instead of
1031 logging or causing an error, due to the internal use of bool_lax
1032 instead of bool when processing it.
1034 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1035 server certificates when making smtp deliveries.
1037 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1039 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1041 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1043 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1044 Merged patch from Sebastian Wiedenroth.
1046 JH/05 Fix results-pipe from transport process. Several recipients, combined
1047 with certificate use, exposed issues where response data items split
1048 over buffer boundaries were not parsed properly. This eventually
1049 resulted in duplicates being sent. This issue only became common enough
1050 to notice due to the introduction of connection certificate information,
1051 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1053 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1054 size buffer was used, resulting in syntax errors when an expansion
1057 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1058 version 3.3.6 or later.
1060 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1061 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1062 both become "event_action", the variables become $event_name, $event_data
1063 and $event_defer_errno. There is a new variable $verify_mode, usable in
1064 routers, transports and related events. The tls:cert event is now also
1065 raised for inbound connections, if the main configuration event_action
1068 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1069 early OCSP support, but no stapling (appears to be less than 1.0.0).
1071 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1072 server certificate names available under the smtp transport option
1073 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1076 JH/10 Time-related extraction expansions from certificates now use the main
1077 option "timezone" setting for output formatting, and are consistent
1078 between OpenSSL and GnuTLS compilations. Bug 1541.
1080 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1081 encoded parameter in the incoming message. Bug 1558.
1083 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1084 include certificate info, eximon was claiming there were spoolfile
1087 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1089 JH/14 Log delivery-related information more consistently, using the sequence
1090 "H=<name> [<ip>]" wherever possible.
1092 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1093 are problematic for Debian distribution, omit them from the release
1096 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1098 JH/16 Fix string representation of time values on 64bit time_t architectures.
1101 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1102 output list separator was used.
1107 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1108 checkers that were complaining about end of non-void function with no
1111 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1112 This was a regression introduced in 4.83 by another bugfix.
1114 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1116 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1117 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1123 TF/01 Correctly close the server side of TLS when forking for delivery.
1125 When a message was received over SMTP with TLS, Exim failed to clear up
1126 the incoming connection properly after forking off the child process to
1127 deliver the message. In some situations the subsequent outgoing
1128 delivery connection happened to have the same fd number as the incoming
1129 connection previously had. Exim would try to use TLS and fail, logging
1130 a "Bad file descriptor" error.
1132 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1133 utilities have not been installed.
1135 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1136 temporary space as the ACL may create new global variables.
1138 TL/01 LDAP support uses per connection or global context settings, depending
1139 upon the detected version of the libraries at build time.
1141 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1142 to extract and use the src ip:port in logging and expansions as if it
1143 were a direct connection from the outside internet. PPv2 support was
1144 updated based on HAProxy spec change in May 2014.
1146 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1148 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1149 Properly escape header and check for NULL return.
1151 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1154 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1156 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1157 characters in header names, implemented as a verify condition.
1158 Contributed by Michael Fischer v. Mollard.
1160 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1161 results permerror and temperror. Previous values are deprecated but
1162 still accepted. In a future release, err_perm and err_temp will be
1163 completely removed, which will be a backward incompatibility if the
1164 ACL tests for either of these two old results. Patch contributed by
1165 user bes-internal on the mailing list.
1167 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1169 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1170 selectors, in both main and reject logs.
1172 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1175 JH/07 Add malware type "sock" for talking to simple daemon.
1177 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1179 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1180 routers/transports under cutthrough routing.
1182 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1183 numbers. Touch up "bool" conditional to keep the same definition.
1185 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1187 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1189 JH/12 Expand items in router/transport headers_add or headers_remove lists
1190 individually rather than the list as a whole. Bug 1452.
1192 Required for reasonable handling of multiple headers_ options when
1193 they may be empty; requires that headers_remove items with embedded
1194 colons must have them doubled (or the list-separator changed).
1196 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1197 view the policy declared in the DMARC record. Currently, $dmarc_status
1198 is a combined value of both the record presence and the result of the
1201 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1203 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1204 dnslookup router and the smtp transport (applying to the forward
1207 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1208 of ldap servers used for a specific lookup. Patch provided by Heiko
1211 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1212 New variable $lookup_dnssec_authenticated for observability.
1214 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1215 Patch submitted by Lars Timman.
1217 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1219 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1220 Requires trusted mode and valid format message id, aborts otherwise.
1221 Patch contributed by Heiko Schlichting.
1223 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1224 certextract with support for various fields. Bug 1358.
1226 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1227 is requested by default, modifiable by smtp transport option
1230 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1231 operate on certificate variables to give certificate fingerprints
1232 Also new ${sha256:cert_variable}.
1234 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1236 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1237 Christian Aistleitner.
1239 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1241 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1242 file. Patch from Wolfgang Breyha.
1244 JH/25 Expand the coverage of the delivery $host and $host_address to
1245 client authenticators run in verify callout. Bug 1476.
1247 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1248 align with daemon_smtp_ports. Bug 72.
1250 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1251 support and error reporting did not work properly.
1253 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1254 and is readable. Patch from Andrew Colin Kissa.
1256 TL/14 Enhance documentation of ${run expansion and how it parses the
1257 commandline after expansion, particularly in the case when an
1258 unquoted variable expansion results in an empty value.
1260 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1262 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1263 by renaming away from it. Addresses GH issue 15, reported by
1266 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1268 TL/15 SECURITY: prevent double expansion in math comparison functions
1269 (can expand unsanitized data). Not remotely exploitable.
1276 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1278 PP/02 Make -n do something, by making it not do something.
1279 When combined with -bP, the name of an option is not output.
1281 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1284 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1285 $sender_host_name and config options to manage this, and basic check
1288 PP/05 DSCP support for outbound connections and control modifier for inbound.
1290 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1291 (Only plugin which currently uses this is kerberos4, which nobody should
1292 be using, but we should make it available and other future plugins might
1293 conceivably use it, even though it would break NAT; stuff *should* be
1294 using channel bindings instead).
1296 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1297 name; added for Sendmail compatibility; requires admin caller.
1298 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1299 just ignore it); requires trusted caller.
1300 Also parse but ignore: -Ac -Am -X<logfile>
1303 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1305 TL/02 Add +smtp_confirmation as a default logging option.
1307 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1308 Patch by Magnus Holmgren from 2007-02-20.
1310 TL/04 Bugzilla 1281 - Spec typo.
1311 Bugzilla 1283 - Spec typo.
1312 Bugzilla 1290 - Spec grammar fixes.
1314 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1316 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1318 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1319 mailing list by by Dmitry Isaikin.
1321 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1323 JH/02 Support "G" suffix to numbers in ${if comparisons.
1325 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1327 NM/01 Bugzilla 1197 - Spec typo
1328 Bugzilla 1196 - Spec examples corrections
1330 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1332 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1333 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1336 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1337 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1339 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1340 "acl {{name}{arg}...}", and optional args on acl condition
1343 JH/05 Permit multiple router/transport headers_add/remove lines.
1345 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1347 JH/07 Avoid using a waiting database for a single-message-only transport.
1348 Performance patch from Paul Fisher. Bugzilla 1262.
1350 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1353 JH/09 Add $headers_added variable, with content from use of ACL modifier
1354 add_header (but not yet added to the message). Bugzilla 199.
1356 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1357 Pulled from Bugzilla 817 by Wolfgang Breyha.
1359 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1361 (nb: this is the same fix as in Exim 4.80.1)
1363 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1366 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1369 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1371 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1372 advertise SMTP AUTH mechanism to us, instead of a generic
1373 protocol violation error. Also, make Exim more robust to bad
1374 data from the Dovecot auth socket.
1376 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1378 When a queue runner is handling a message, Exim first routes the
1379 recipient addresses, during which it prunes them based on the retry
1380 hints database. After that it attempts to deliver the message to
1381 any remaining recipients. It then updates the hints database using
1384 So if a recipient address works intermittently, it can get repeatedly
1385 deferred at routing time. The retry hints record remains fresh so the
1386 address never reaches the final cutoff time.
1388 This is a fairly common occurrence when a user is bumping up against
1389 their storage quota. Exim had some logic in its local delivery code
1390 to deal with this. However it did not apply to per-recipient defers
1391 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1393 This change adds a proper retry rule check during routing so that the
1394 final cutoff time is checked against the message's age. We only do
1395 this check if there is an address retry record and there is not a
1396 domain retry record; this implies that previous attempts to handle
1397 the address had the retry_use_local_parts option turned on. We use
1398 this as an approximation for the destination being like a local
1399 delivery, as in LMTP.
1401 I suspect this new check makes the old local delivery cutoff check
1402 redundant, but I have not verified this so I left the code in place.
1404 TF/02 Correct gecos expansion when From: is a prefix of the username.
1406 Test 0254 submits a message to Exim with the header
1410 When I ran the test suite under the user fanf2, Exim expanded
1411 the header to contain my full name, whereas it should have added
1412 a Resent-Sender: header. It erroneously treats any prefix of the
1413 username as equal to the username.
1415 This change corrects that bug.
1417 GF/01 DCC debug and logging tidyup
1418 Error conditions log to paniclog rather than rejectlog.
1419 Debug lines prefixed by "DCC: " to remove any ambiguity.
1421 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1423 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1424 Bug spotted by Jeremy Harris; was flawed since initial commit.
1425 Would have resulted in OCSP responses post-SNI triggering an Exim
1426 NULL dereference and crash.
1428 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1430 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1431 Bug detection, analysis and fix by Samuel Thibault.
1432 Bugzilla 1331, Debian bug #698092.
1434 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1436 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1437 Server implementation by Todd Lyons, client by JH.
1438 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1439 config variable "prdr_enable" controls whether the server
1440 advertises the facility. If the client requests PRDR a new
1441 acl_data_smtp_prdr ACL is called once for each recipient, after
1442 the body content is received and before the acl_smtp_data ACL.
1443 The client is controlled by both of: a hosts_try_prdr option
1444 on the smtp transport, and the server advertisement.
1445 Default client logging of deliveries and rejections involving
1446 PRDR are flagged with the string "PRDR".
1448 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1449 fclose(). Diagnosis by Todd Lyons.
1451 PP/17 Update configure.default to handle IPv6 localhost better.
1452 Patch by Alain Williams (plus minor tweaks).
1455 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1456 This is now consistent with GnuTLS, and is now documented: the
1457 previous undocumented portable approach to treating the option as
1458 unset was to force an expansion failure. That still works, and
1459 an empty string is now equivalent.
1461 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1462 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1463 not performing validation itself.
1465 PP/20 Added force_command boolean option to pipe transport.
1466 Patch from Nick Koston, of cPanel Inc.
1468 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1471 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1473 PP/21 Fix eximon continuous updating with timestamped log-files.
1474 Broken in a format-string cleanup in 4.80, missed when I repaired the
1475 other false fix of the same issue.
1476 Report and fix from Heiko Schlichting.
1479 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1480 Report from Prashanth Katuri.
1482 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1483 It's SecureTransport, so affects any MacOS clients which use the
1484 system-integrated TLS libraries, including email clients.
1486 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1487 using a MIME ACL for non-SMTP local injection.
1488 Report and assistance in diagnosis by Warren Baker.
1490 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1492 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1494 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1495 last id that failed so it may be referenced in subsequent ACL's.
1497 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1500 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1501 ldap library initialization, allowing self-signed CA's to be
1502 used. Also properly sets require_cert option later in code by
1503 using NULL (global ldap config) instead of ldap handle (per
1504 session). Bug diagnosis and testing by alxgomz.
1506 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1507 the src/util/ subdirectory.
1509 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1510 renamed to Transport Post Delivery Action by Jeremy Harris, as
1513 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1514 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1515 redis_servers = needs to be configured which will be used by the redis
1516 lookup. Patch from Warren Baker, of The Packet Hub.
1518 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1520 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1521 hostname or reverse DNS when processing a host list. Used suggestions
1522 from multiple comments on this bug.
1524 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
1526 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
1527 Missed a few lines, added it to make the runtest require no keyboard
1530 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
1531 contains upper case chars. Make router use caseful_local_part.
1533 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
1534 support when GnuTLS has been built with p11-kit.
1540 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
1542 This, or similar/improved, will also be change PP/11 of 4.82.
1548 PP/01 Handle short writes when writing local log-files.
1549 In practice, only affects FreeBSD (8 onwards).
1550 Bugzilla 1053, with thanks to Dmitry Isaikin.
1552 NM/01 Bugzilla 949 - Documentation tweak
1554 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
1557 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
1559 PP/02 Implemented gsasl authenticator.
1561 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
1563 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
1564 `pkg-config foo` for cflags/libs.
1566 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
1567 with rest of GSASL and with heimdal_gssapi.
1569 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
1570 `pkg-config foo` for cflags/libs for the TLS implementation.
1572 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
1573 properties get this fed in as external SSF. A number of robustness
1574 and debugging improvements to the cyrus_sasl authenticator.
1576 PP/08 cyrus_sasl server now expands the server_realm option.
1578 PP/09 Bugzilla 1214 - Log authentication information in reject log.
1579 Patch by Jeremy Harris.
1581 PP/10 Added dbmjz lookup type.
1583 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
1585 PP/12 MAIL args handles TAB as well as SP, for better interop with
1586 non-compliant senders.
1587 Analysis and variant patch by Todd Lyons.
1589 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
1590 Bug report from Lars Müller <lars@samba.org> (via SUSE),
1591 Patch from Dirk Mueller <dmueller@suse.com>
1593 PP/13 tls_peerdn now print-escaped for spool files.
1594 Observed some $tls_peerdn in wild which contained \n, which resulted
1595 in spool file corruption.
1597 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
1598 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
1599 or write after TLS renegotiation, which otherwise led to messages
1602 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
1603 as a tracking header (ie: a signed header comes before the signature).
1604 Patch from Wolfgang Breyha.
1606 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
1607 comma-sep list; embedded commas doubled.
1609 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
1611 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
1613 Report and patch from Dmitry Banschikov.
1615 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
1616 Removed SSL_clear() after SSL_new() which led to protocol negotiation
1617 failures. We appear to now support TLS1.1+ with Exim.
1619 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
1620 lets Exim select keys and certificates based upon TLS SNI from client.
1621 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
1622 before an outbound SMTP session. New log_selector, +tls_sni.
1624 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
1625 NULL dereference. Report and patch from Alun Jones.
1627 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
1628 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
1629 Not seeing resolver debug output on NetBSD, but suspect this is a
1630 resolver implementation change.
1632 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
1633 Left warnings. Added "eximon gdb" invocation mode.
1635 PP/21 Defaulting "accept_8bitmime" to true, not false.
1637 PP/22 Added -bw for inetd wait mode support.
1639 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
1640 locate the relevant includes and libraries. Made this the default.
1642 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
1643 Bugzilla 1246, report and most of solution from Tomasz Kusy.
1645 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
1646 This may cause build issues on older platforms.
1648 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
1649 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
1650 gnutls_require_mac & gnutls_require_protocols (no longer supported).
1651 Added SNI support via GnuTLS too.
1652 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
1654 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
1656 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
1657 Applied second patch from Janne, implementing suggestion to default
1658 multiple-strings-in-record handling to match SPF spec.
1660 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
1662 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
1663 read-only, out of scope).
1664 Patch from Wolfgang Breyha, report from Stuart Northfield.
1666 PP/29 Fix three issues highlighted by clang analyser static analysis.
1667 Only crash-plausible issue would require the Cambridge-specific
1668 iplookup router and a misconfiguration.
1669 Report from Marcin Mirosław.
1671 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
1673 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
1674 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
1675 As part of this, removing so much warning spew let me fix some minor
1676 real issues in debug logging.
1678 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
1679 assignment on my part. Fixed.
1681 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
1682 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
1683 Janne Snabb (who went above and beyond: thank you).
1685 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
1686 string otherwise requires a connection and a bunch more work and it's
1687 relatively easy to get wrong. Should also expose TLS library linkage
1690 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
1691 64-bit ${eval} (JH/03).
1693 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
1694 GNU libc to support some of the 64-bit stuff, should not lead to
1695 conflicts. Defined before os.h is pulled in, so if a given platform
1696 needs to override this, it can.
1698 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
1699 protection layer was required, which is not implemented.
1700 Bugzilla 1254, patch from Wolfgang Breyha.
1702 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
1703 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
1704 tls_dhparam take prime identifiers. Also unbreak combination of
1705 OpenSSL+DH_params+TLSSNI.
1707 PP/39 Disable SSLv2 by default in OpenSSL support.
1713 PP/01 Solaris build fix for Oracle's LDAP libraries.
1714 Bugzilla 1109, patch from Stephen Usher.
1716 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
1718 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
1721 TF/02 Fix a couple more cases where we did not log the error message
1722 when unlink() failed. See also change 4.74-TF/03.
1724 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
1725 lock up or crash if it happened to be inside a call to libc when it
1726 got a SIGUSR1 from exiwhat.
1728 The SIGUSR1 handler appends the current process status to the process
1729 log which is later printed by exiwhat. It used to use the general
1730 purpose logging code to do this, but several functions it calls are
1731 not safe for signals.
1733 The new output code in the SIGUSR1 handler is specific to the process
1734 log, and simple enough that it's easy to inspect for signal safety.
1735 Removing some special cases also simplifies the general logging code.
1736 Removing the spurious timestamps from the process log simplifies
1739 TF/04 Improved ratelimit ACL condition.
1741 The /noupdate option has been deprecated in favour of /readonly which
1742 has clearer semantics. The /leaky, /strict, and /readonly update modes
1743 are mutually exclusive. The update mode is no longer included in the
1744 database key; it just determines when the database is updated. (This
1745 means that when you upgrade Exim will forget old rate measurements.)
1747 Exim now checks that the per_* options are used with an update mode that
1748 makes sense for the current ACL. For example, when Exim is processing a
1749 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
1750 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
1751 must specify per_mail/readonly. If you omit the update mode it defaults to
1752 /leaky where that makes sense (as before) or /readonly where required.
1754 The /noupdate option is now undocumented but still supported for
1755 backwards compatibility. It is equivalent to /readonly except that in
1756 ACLs where /readonly is required you may specify /leaky/noupdate or
1757 /strict/noupdate which are treated the same as /readonly.
1759 A useful new feature is the /count= option. This is a generalization
1760 of the per_byte option, so that you can measure the throughput of other
1761 aggregate values. For example, the per_byte option is now equivalent
1762 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
1764 The per_rcpt option has been generalized using the /count= mechanism
1765 (though it's more complicated than the per_byte equivalence). When it is
1766 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
1767 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
1768 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
1769 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
1770 Note that using per_rcpt with a non-readonly update mode in more than
1771 one ACL will cause the recipients to be double-counted. (The per_mail
1772 and per_byte options don't have this problem.)
1774 The handling of very low rates has changed slightly. If the computed rate
1775 is less than the event's count (usually one) then this event is the first
1776 after a long gap. In this case the rate is set to the same as this event's
1777 count, so that the first message of a spam run is counted properly.
1779 The major new feature is a mechanism for counting the rate of unique
1780 events. The new per_addr option counts the number of different
1781 recipients that someone has sent messages to in the last time period. It
1782 behaves like per_rcpt if all the recipient addresses are different, but
1783 duplicate recipient addresses do not increase the measured rate. Like
1784 the /count= option this is a general mechanism, so the per_addr option
1785 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
1786 example, measure the rate that a client uses different sender addresses
1787 with the options per_mail/unique=$sender_address. There are further
1788 details in the main documentation.
1790 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
1792 TF/06 Removed a few PCRE remnants.
1794 TF/07 Automatically extract Exim's version number from tags in the git
1795 repository when doing development or release builds.
1797 PP/02 Raise smtp_cmd_buffer_size to 16kB.
1798 Bugzilla 879. Patch from Paul Fisher.
1800 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
1801 Heavily based on revision 40f9a89a from Simon Arlott's tree.
1804 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
1806 PP/05 Variable $av_failed, true if the AV scanner deferred.
1807 Bugzilla 1078. Patch from John Horne.
1809 PP/06 Stop make process more reliably on build failure.
1810 Bugzilla 1087. Patch from Heiko Schlittermann.
1812 PP/07 Make maildir_use_size_file an _expandable_ boolean.
1813 Bugzilla 1089. Patch from Heiko Schlittermann.
1815 PP/08 Handle ${run} returning more data than OS pipe buffer size.
1816 Bugzilla 1131. Patch from Holger Weiß.
1818 PP/09 Handle IPv6 addresses with SPF.
1819 Bugzilla 860. Patch from Wolfgang Breyha.
1821 PP/10 GnuTLS: support TLS 1.2 & 1.1.
1823 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
1826 PP/11 match_* no longer expand right-hand-side by default.
1827 New compile-time build option, EXPAND_LISTMATCH_RHS.
1828 New expansion conditions, "inlist", "inlisti".
1830 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
1832 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
1834 PP/14 fix log_write() format string regression from TF/03.
1835 Bugzilla 1152. Patch from Dmitry Isaikin.
1841 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
1843 PP/02 Harmonised TLS library version reporting; only show if debugging.
1844 Layout now matches that introduced for other libraries in 4.74 PP/03.
1846 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
1848 PP/04 New "dns_use_edns0" global option.
1850 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
1853 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
1854 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
1856 TK/01 Updated PolarSSL code to 0.14.2.
1857 Bugzilla 1097. Patch from Andreas Metzler.
1859 PP/07 Catch divide-by-zero in ${eval:...}.
1860 Fixes bugzilla 1102.
1862 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
1865 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
1866 format-string attack -- SECURITY: remote arbitrary code execution.
1868 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
1869 time unintentionally subject to list matching rules, letting the header
1870 cause arbitrary Exim lookups (of items which can occur in lists, *not*
1871 arbitrary string expansion). This allowed for information disclosure.
1873 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
1874 INT_MIN/-1 -- value coerced to INT_MAX.
1880 NM/01 Workaround for PCRE version dependency in version reporting
1883 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
1884 This fixes portability to compilers other than gcc, notably
1885 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
1887 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
1888 makefiles for portability to HP-UX and POSIX correctness.
1890 PP/01 Permit LOOKUP_foo enabling on the make command-line.
1891 Also via indented variable definition in the Makefile.
1892 (Debugging by Oliver Heesakkers).
1894 PP/02 Restore caching of spamd results with expanded spamd_address.
1895 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
1897 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
1898 Improves build reliability. Fix from: Frank Elsner
1900 NM/02 Fix wide character breakage in the rfc2047 coding
1901 Fixes bug 1064. Patch from Andrey N. Oktyabrski
1903 NM/03 Allow underscore in dnslist lookups
1904 Fixes bug 1026. Patch from Graeme Fowler
1906 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
1907 Code patches from Adam Ciarcinski of NetBSD.
1909 NM/04 Fixed exiqgrep to cope with mailq missing size issue
1912 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
1913 is logged, to avoid truncation. Patch from John Horne.
1915 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
1916 Patch from Jakob Hirsch.
1918 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
1919 SQL string expansion failure details.
1920 Patch from Andrey Oktyabrski.
1922 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
1923 Patch from Simon Arlott.
1925 PP/09 New lookups functionality failed to compile on old gcc which rejects
1926 extern declarations in function scope.
1927 Patch from Oliver Fleischmann
1929 PP/10 Use sig_atomic_t for flags set from signal handlers.
1930 Check getgroups() return and improve debugging.
1931 Fixed developed for diagnosis in bug 927 (which turned out to be
1934 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
1935 Patch from Mark Zealey.
1937 PP/12 Bugzilla 1056: Improved spamd server selection.
1938 Patch from Mark Zealey.
1940 PP/13 Bugzilla 1086: Deal with maildir quota file races.
1941 Based on patch from Heiko Schlittermann.
1943 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
1944 Patch from Uwe Doering, sign-off by Michael Haardt.
1946 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
1947 variable declaration deep within a block. Bug and patch from
1950 PP/15 lookups-Makefile IRIX compatibility coercion.
1952 PP/16 Make DISABLE_DKIM build knob functional.
1954 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
1955 Patch by Simon Arlott
1957 TF/03 Fix valgrind.h portability to C89 compilers that do not support
1958 variable argument macros. Our copy now differs from upstream.
1964 TF/01 Failure to get a lock on a hints database can have serious
1965 consequences so log it to the panic log.
1967 TF/02 Log LMTP confirmation messages in the same way as SMTP,
1968 controlled using the smtp_confirmation log selector.
1970 TF/03 Include the error message when we fail to unlink a spool file.
1972 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
1973 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
1974 for maintaining out-of-tree patches for some time.
1976 PP/01 Bugzilla 139: Documentation and portability issues.
1977 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
1978 Handle per-OS dynamic-module compilation flags.
1980 PP/02 Let /dev/null have normal permissions.
1981 The 4.73 fixes were a little too stringent and complained about the
1982 permissions on /dev/null. Exempt it from some checks.
1983 Reported by Andreas M. Kirchwitz.
1985 PP/03 Report version information for many libraries, including
1986 Exim version information for dynamically loaded libraries. Created
1987 version.h, now support a version extension string for distributors
1988 who patch heavily. Dynamic module ABI change.
1990 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
1991 privilege escalation vulnerability whereby the Exim run-time user
1992 can cause root to append content of the attacker's choosing to
1995 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
1998 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
1999 If dropping privileges for untrusted macros, we disabled normal logging
2000 on the basis that it would fail; for the Exim run-time user, this is not
2001 the case, and it resulted in successful deliveries going unlogged.
2002 Fixed. Reported by Andreas Metzler.
2008 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2009 only prepend for the Resent-* case. Fixes regression introduced in
2010 Exim 4.70 by NM/22 for Bugzilla 607.
2012 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2013 increasing numbers of administrators be bitten by this.
2015 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2017 PP/03 Bugzilla 994: added openssl_options main configuration option.
2019 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2021 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2023 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2025 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2026 without a peer certificate, leading to a segfault because of an
2027 assumption that peers always have certificates. Be a little more
2028 paranoid. Problem reported by Martin Tscholak.
2030 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2031 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2032 NB: ClamAV planning to remove STREAM in "middle of 2010".
2033 CL also introduces -bmalware, various -d+acl logging additions and
2034 more caution in buffer sizes.
2036 PP/09 Implemented reverse_ip expansion operator.
2038 PP/10 Bugzilla 937: provide a "debug" ACL control.
2040 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2042 PP/12 Bugzilla 973: Implement --version.
2044 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2046 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2048 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2050 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2051 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2052 ignore trailing whitespace.
2054 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2056 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2059 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2060 Notification from Dr Andrew Aitchison.
2062 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2063 ExtendedDetectionInfo response format.
2064 Notification from John Horne.
2066 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2069 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2070 XSL and documented dependency on system catalogs, with examples of how
2073 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2076 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2077 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2078 configuration file which is writeable by the Exim user or group.
2080 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2081 of configuration files to cover files specified with the -C option if
2082 they are going to be used with root privileges, not just the default
2085 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2086 option (effectively making it always true).
2088 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2089 files to be used while preserving root privileges.
2091 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2092 that rogue child processes cannot use them.
2094 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2095 run-time user, instead of root.
2097 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2098 Exim run-time user without dropping privileges.
2100 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2101 result string, instead of calling string_vformat() twice with the same
2104 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2105 for other users. Others should always drop root privileges if they use
2106 -C on the command line, even for a whitelisted configure file.
2108 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2110 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2116 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2117 $data_path, and $header_path variables; fixed documentation bugs and
2120 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2121 exipick to access non-standard spools, including the "frozen" queue
2124 NM/01 Bugzilla 965: Support mysql stored procedures.
2125 Patch from Alain Williams
2127 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2129 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2130 Patch from Andreas Metzler
2132 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2133 Patch from Kirill Miazine
2135 NM/05 Bugzilla 671: Added umask to procmail example.
2137 JJ/03 installed exipick 20100323.0, fixing doc bug
2139 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2140 directory. Notification and patch from Dan Rosenberg.
2142 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2144 TK/02 Improve log output when DKIM signing operation fails.
2146 MH/01 Treat the transport option dkim_domain as a colon separated
2147 list, not as a single string, and sign the message with each element,
2148 omitting multiple occurences of the same signer.
2150 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2151 Bugzilla 985, 986. Patch by Simon Arlott
2153 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2154 Patch by Simon Arlott
2156 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2157 MBX locking. Notification from Dan Rosenberg.
2163 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2165 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2167 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2169 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2171 NM/04 Bugzilla 915: Flag broken perl installation during build.
2177 TK/01 Added patch by Johannes Berg that expands the main option
2178 "spamd_address" if it starts with a dollar sign.
2180 TK/02 Write list of recipients to X-Envelope-Sender header when building
2181 the mbox-format spool file for content scanning (suggested by Jakob
2184 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2185 (http://www.dcc-servers.net/) support via dccifd. Activated by
2186 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2188 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2189 by Mark Daniel Reidel <mr@df.eu>.
2191 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2192 When building exim an external PCRE library is now needed -
2193 PCRE is a system library on the majority of modern systems.
2194 See entry on PCRE_LIBS in EDITME file.
2196 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2197 conversation. Added nologin parameter to request.
2198 Patch contributed by Kirill Miazine.
2200 TF/01 Do not log submission mode rewrites if they do not change the address.
2202 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2204 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2205 log files in place. Contributed by Roberto Lima.
2207 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2209 TF/03 Bugzilla 615: When checking the local_parts router precondition
2210 after a local_part_suffix or local_part_prefix option, Exim now
2211 does not use the address's named list lookup cache, since this
2212 contains cached lookups for the whole local part.
2214 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2215 Robert Millan. Documentation is in experimental-spec.txt.
2217 TF/04 Bugzilla 668: Fix parallel build (make -j).
2219 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2221 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2222 Patch provided by Jan Srzednicki.
2224 TF/05 Leading white space used to be stripped from $spam_report which
2225 wrecked the formatting. Now it is preserved.
2227 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2228 that they are available at delivery time.
2230 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2232 TF/08 TLS error reporting now respects the incoming_interface and
2233 incoming_port log selectors.
2235 TF/09 Produce a more useful error message if an SMTP transport's hosts
2236 setting expands to an empty string.
2238 NM/06 Bugzilla 744: EXPN did not work under TLS.
2239 Patch provided by Phil Pennock.
2241 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2242 Patch provided by Richard Godbee.
2244 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2245 acl_smtp_notquit, added index entry.
2247 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2248 Patch provided by Eugene Bujak.
2250 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2251 accept(). Patch provided by Maxim Dounin.
2253 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2254 Patch provided by Phil Pennock.
2256 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2258 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2259 Patch provided by Brad "anomie" Jorsch.
2261 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2262 Patch provided by Dean Brooks.
2264 TK/05 Add native DKIM support (does not depend on external libraries).
2266 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2267 Patch provided by Graeme Fowler.
2269 NM/16 Bugzilla 851: Documentation example syntax fix.
2271 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2273 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2276 NM/19 Bugzilla 745: TLS version reporting.
2277 Patch provided by Phil Pennock.
2279 NM/20 Bugzilla 167: bool: condition support.
2280 Patch provided by Phil Pennock.
2282 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2283 clients. Patch provided by Phil Pennock.
2285 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2286 Patch provided by Brad "anomie" Jorsch.
2288 NM/23 Bugzilla 687: Fix misparses in eximstats.
2289 Patch provided by Heiko Schlittermann.
2291 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2292 Patch provided by Heiko Schlittermann.
2294 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2295 plus update to original patch.
2297 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2299 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2300 Patch provided by David Brownlee.
2302 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2304 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2306 NM/30 Bugzilla 888: TLS documentation bugfixes.
2308 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2310 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2311 Unlike the original bugzilla I have changed all shell scripts in src tree.
2313 NM/33 Bugzilla 898: Transport filter timeout fix.
2314 Patch by Todd Rinaldo.
2316 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2317 Patch by Serge Demonchaux.
2319 NM/35 Bugzilla 39: Base64 decode bug fixes.
2320 Patch by Jakob Hirsch.
2322 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2324 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2326 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2328 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2334 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2335 ALT-N's libdkim that I have put here:
2336 http://duncanthrax.net/exim-experimental/
2338 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2339 were called 'true' and it seems that C99 defines that as a reserved
2340 keyword to be used with 'bool' variable types. That means you could
2341 not include C99-style headers which use bools without triggering
2342 build errors in sieve.c.
2344 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2345 as mailq or other aliases. Changed the --help handling significantly
2346 to do whats expected. exim_usage() emits usage/help information.
2348 SC/01 Added the -bylocaldomain option to eximstats.
2350 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2352 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2354 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2360 PH/01 Another patch from the Sieve maintainer.
2362 PH/02 When an IPv6 address is converted to a string for single-key lookup
2363 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2364 dots are used instead of colons so that keys in lsearch files need not
2365 contain colons. This was done some time before quoting was made available
2366 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2367 (notated using the quote facility) so as to distinguish them from IPv4
2368 keys. This meant that lookups for IP addresses in host lists did not work
2369 for iplsearch lookups.
2371 This has been fixed by arranging for IPv6 addresses to be expressed with
2372 colons if the lookup type is iplsearch. This is not incompatible, because
2373 previously such lookups could never work.
2375 The situation is now rather anomalous, since one *can* have colons in
2376 ordinary lsearch keys. However, making the change in all cases is
2377 incompatible and would probably break a number of configurations.
2379 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2382 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2383 conversion specification without a maximum field width, thereby enabling
2384 a rogue spamd server to cause a buffer overflow. While nobody in their
2385 right mind would setup Exim to query an untrusted spamd server, an
2386 attacker that gains access to a server running spamd could potentially
2387 exploit this vulnerability to run arbitrary code as the Exim user.
2389 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2390 $primary_hostname instead of what libspf2 thinks the hosts name is.
2392 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2393 a directory entry by the name of the lookup key. Previously, if a
2394 symlink pointed to a non-existing file or a file in a directory that
2395 Exim lacked permissions to read, a lookup for a key matching that
2396 symlink would fail. Now it is enough that a matching directory entry
2397 exists, symlink or not. (Bugzilla 503.)
2399 PH/03 The body_linecount and body_zerocount variables are now exported in the
2402 PH/04 Added the $dnslist_matched variable.
2404 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2405 This means they are set thereafter only if the connection becomes
2408 PH/06 Added the client_condition to authenticators so that some can be skipped
2409 by clients under certain conditions.
2411 PH/07 The error message for a badly-placed control=no_multiline_responses left
2412 "_responses" off the end of the name.
2414 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2416 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2417 (without spaces) instead of just copying the configuration text.
2419 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2421 PH/11 Added $max_received_linelength.
2423 PH/12 Added +ignore_defer and +include_defer to host lists.
2425 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2426 way in which PCRE > 7.0 is built.
2428 PH/14 Implemented queue_only_load_latch.
2430 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2431 MAIL command. The effect was to mangle the value on 64-bit systems.
2433 PH/16 Another patch from the Sieve maintainer.
2435 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2437 PH/18 If a system quota error occurred while trying to create the file for
2438 a maildir delivery, the message "Mailbox is full" was not appended to the
2439 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2440 only to a quota excession during the actual writing of the file.
2442 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2443 characters?) which causes problems in log lines. The DN values are now
2444 passed through string_printing() before being added to log lines.
2446 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2447 and InterBase are left for another time.)
2449 PH/21 Added message_body_newlines option.
2451 PH/22 Guard against possible overflow in moan_check_errorcopy().
2453 PH/23 POSIX allows open() to be a macro; guard against that.
2455 PH/24 If the recipient of an error message contained an @ in the local part
2456 (suitably quoted, of course), incorrect values were put in $domain and
2457 $local_part during the evaluation of errors_copy.
2463 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2464 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2467 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2468 issue a MAIL command.
2470 PH/02 In an ACL statement such as
2472 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2474 if a client was not listed at all, or was listed with a value other than
2475 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2476 the condition was not true (as it should be), so access was not denied.
2477 The bug was that the ! inversion was incorrectly passed on to the second
2478 item. This has been fixed.
2480 PH/03 Added additional dnslists conditions == and =& which are different from
2481 = and & when the dns lookup returns more than one IP address.
2483 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2484 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2486 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2487 FSYNC, which compiles an option called disable_fsync that allows for
2488 bypassing fsync(). The documentation is heavily laced with warnings.
2490 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2492 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2493 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2494 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2495 including adding "make clean"; (3) Added -fPIC when compiling the test
2496 dynamically loaded module, to get rid of a warning.
2498 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2499 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2500 = 0s. The bug is otherwise harmless.
2502 PH/07 There was a bug in the dovecot authenticator such that the value of
2503 $auth1 could be overwritten, and so not correctly preserved, after a
2504 successful authentication. This usually meant that the value preserved by
2505 the server_setid option was incorrect.
2507 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2509 PH/09 Installed PCRE release 7.0.
2511 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2512 run for batched SMTP input. It is now run at the start of every message
2513 in the batch. While fixing this I discovered that the process information
2514 (output by running exiwhat) was not always getting set for -bs and -bS
2515 input. This is fixed, and it now also says "batched" for BSMTP.
2517 PH/11 Added control=no_pipelining.
2519 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2520 patch, slightly modified), and move the expansion of helo_data till after
2521 the connection is made in the smtp transport (so it can use these
2524 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
2526 PH/14 Added log_selector = +pid.
2528 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
2530 PH/16 Add ${if forany and ${if forall.
2532 PH/17 Added dsn_from option to vary the From: line in DSNs.
2534 PH/18 Flush SMTP output before performing a callout, unless control =
2535 no_callout_flush is set.
2537 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
2538 was true (the default) a successful delivery failed to delete the retry
2539 item, thus causing premature timeout of the address. The bug is now
2542 PH/20 Added hosts_avoid_pipelining to the smtp transport.
2544 PH/21 Long custom messages for fakedefer and fakereject are now split up
2545 into multiline responses in the same way that messages for "deny" and
2546 other ACL rejections are.
2548 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
2549 with slight modification.
2551 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
2552 draft, changing the syntax and factoring some duplicate code".
2554 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
2555 for deliveries of the second and subsequent messages over the same SMTP
2558 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
2559 ${reduce, with only minor "tidies".
2561 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
2563 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
2564 expansion side effects.
2566 PH/27 When a message times out after an over-quota error from an Exim-imposed
2567 quota, the bounce message says "mailbox is full". This message was not
2568 being given when it was a system quota that was exceeded. It now should
2571 MH/03 Made $recipients available in local_scan(). local_scan() already has
2572 better access to the recipient list through recipients_list[], but
2573 $recipients can be useful in postmaster-provided expansion strings.
2575 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
2576 in the case of a MAIL command with additional options following the
2577 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
2578 were accidentally chopped off.
2580 PH/29 SMTP synchronization checks are implemented when a command is read -
2581 there is a check that no more input is waiting when there shouldn't be
2582 any. However, for some commands, a delay in an ACL can mean that it is
2583 some time before the response is written. In this time, more input might
2584 arrive, invalidly. So now there are extra checks after an ACL has run for
2585 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
2586 pipelining has not been advertised.
2588 PH/30 MH's patch to allow iscntrl() characters to be list separators.
2590 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
2591 returned in the SMTP response when smtp_return_error_details was false.
2592 This has been fixed.
2594 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
2595 instead of the C I/O that was originally supplied, because problems were
2596 reported on Solaris.
2598 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
2599 Exim which did not show up earlier: it was assuming that a call to
2600 SSL_CTX_set_info_callback() might give an error value. In fact, there is
2601 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
2602 was a macro that became an assignment, so it seemed to work. This has
2603 changed to a proper function call with a void return, hence the compile
2604 error. Exim's code has been fixed.
2606 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
2609 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
2611 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
2613 PH/37 If a message is not accepted after it has had an id assigned (e.g.
2614 because it turns out to be too big or there is a timeout) there is no
2615 "Completed" line in the log. When some messages of this type were
2616 selected by exigrep, they were listed as "not completed". Others were
2617 picked up by some special patterns. I have improved the selection
2618 criteria to be more general.
2620 PH/38 The host_find_failed option in the manualroute router can now be set
2621 to "ignore", to completely ignore a host whose IP address cannot be
2622 found. If all hosts are ignored, the behaviour is controlled by the new
2623 host_all_ignored option.
2625 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
2626 homing or because of multiple MX records with /mx) generated more than
2627 one IP address, and the following item turned out to be the local host,
2628 all the secondary addresses of the first item were incorrectly removed
2629 from the list, along with the local host and any following hosts (which
2630 is what is supposed to happen).
2632 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
2633 whoever called Exim into the -H file. In the case of the daemon it was
2634 behaving confusingly. When first started, it used values for whoever
2635 started the daemon, but after a SIGHUP it used the Exim user (because it
2636 calls itself on a restart). I have changed the code so that it now always
2639 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
2640 message are rejected with the same error (e.g. no authentication or bad
2641 sender address), and a DATA command is nevertheless sent (as can happen
2642 with PIPELINING or a stupid MUA), the error message that was given to the
2643 RCPT commands is included in the rejection of the DATA command. This is
2644 intended to be helpful for MUAs that show only the final error to their
2647 PH/42 Another patch from the Sieve maintainer.
2649 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
2650 Eximstats - Fixed some broken HTML links and added missing column headers
2652 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
2653 columns for Rejects, Temp Rejects, Ham, and Spam rows.
2655 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
2657 PH/43 Yet another patch from the Sieve maintainer.
2659 PH/44 I found a way to check for a TCP/IP connection going away before sending
2660 the response to the final '.' that terminates a message, but only in the
2661 case where the client has not sent further data following the '.'
2662 (unfortunately, this is allowed). However, in many cases there won't be
2663 any further data because there won't be any more messages to send. A call
2664 to select() can be used: if it shows that the input is "ready", there is
2665 either input waiting, or the socket has been closed. An attempt to read
2666 the next input character can distinguish the two cases. Previously, Exim
2667 would have sent an OK response which the client would never have see.
2668 This could lead to message repetition. This fix should cure that, at
2669 least in a lot of common cases.
2671 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
2672 advertised in response to EHLO.
2678 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
2679 fixed by 4.65/MH/01 (is this a record?) are fixed:
2681 (i) An empty string was always treated as zero by the numeric comparison
2682 operators. This behaviour has been restored.
2684 (ii) It is documented that the numeric comparison operators always treat
2685 their arguments as decimal numbers. This was broken in that numbers
2686 starting with 0 were being interpreted as octal.
2688 While fixing these problems I realized that there was another issue that
2689 hadn't been noticed. Values of message_size_limit (both the global option
2690 and the transport option) were treated as octal if they started with 0.
2691 The documentation was vague. These values are now always treated as
2692 decimal, and I will make that clear in the documentation.
2698 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
2699 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
2702 MH/01 Don't check that the operands of numeric comparison operators are
2703 integers when their expansion is in "skipping" mode (fixes bug
2704 introduced by 4.64-PH/07).
2706 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
2707 child addresses, Exim now panics and dies. Previously, because the count
2708 is held in a short int, deliveries were likely to be lost. As such a
2709 large number of recipients for a single message is ridiculous
2710 (performance will be very, very poor), I have chosen to impose a limit
2711 rather than extend the field.
2717 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
2718 leftover -K file (the existence of which was triggered by #402).
2719 While we were at it, introduced process PID as part of the -K
2720 filename. This should rule out race conditions when creating
2723 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
2724 processing considerably. Previous code took too long for large mails,
2725 triggering a timeout which in turn triggers #401.
2727 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
2728 in the DK code in transports.c. sendfile() is not really portable,
2729 hence the _LINUX specificness.
2731 TF/01 In the add_headers option to the mail command in an Exim filter,
2732 there was a bug that Exim would claim a syntax error in any
2733 header after the first one which had an odd number of characters
2736 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
2737 callout verification, Exim cached a "reject" for the entire domain. This
2738 is correct for most verifications, but it is not correct for a recipient
2739 verification with use_sender or use_postmaster set, because in that case
2740 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
2741 case of MAIL FROM:<> rejection from other early rejections (e.g.
2742 rejection of HELO). When verifying a recipient using a non-null MAIL
2743 address, the cache is ignored if it shows MAIL FROM:<> rejection.
2744 Whatever the result of the callout, the value of the domain cache is
2745 left unchanged (for any other kind of callout, getting as far as trying
2746 RCPT means that the domain itself is ok).
2748 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
2751 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
2752 manifest itself as EPIPE rather than ECONNECT. When tidying away a
2753 session, the daemon ignores ECONNECT errors and logs others; it now
2754 ignores EPIPE as well.
2756 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
2757 (quoted-printable decoding).
2759 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
2760 later the small subsequent patch to fix an introduced bug.
2762 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
2764 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
2766 PH/08 An error is now given if message_size_limit is specified negative.
2768 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
2769 to be given (somewhat) arbitrary names.
2771 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
2774 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
2775 miscellaneous code fixes
2777 PH/10 Added the log_reject_target ACL modifier to specify where to log
2780 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
2781 hostname. This is wrong, because it relates to the incoming message (and
2782 probably the interface on which it is arriving) and not to the outgoing
2783 callout (which could be using a different interface). This has been
2784 changed to use the value of the helo_data option from the smtp transport
2785 instead - this is what is used when a message is actually being sent. If
2786 there is no remote transport (possible with a router that sets up host
2787 addresses), $smtp_active_hostname is used.
2789 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
2790 tweaks were necessary in order to get it to work (see also 21 below):
2791 (a) The code assumed that strncpy() returns a negative number on buffer
2792 overflow, which isn't the case. Replaced with Exim's string_format()
2794 (b) There were several signed/unsigned issues. I just did the minimum
2795 hacking in of casts. There is scope for a larger refactoring.
2796 (c) The code used strcasecmp() which is not a standard C function.
2797 Replaced with Exim's strcmpic() function.
2798 (d) The code set only $1; it now sets $auth1 as well.
2799 (e) A simple test gave the error "authentication client didn't specify
2800 service in request". It would seem that Dovecot has changed its
2801 interface. Fortunately there's a specification; I followed it and
2802 changed what the client sends and it appears to be working now.
2804 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
2807 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
2808 address A is aliased to B and C, where B exists and C does not. Without
2809 -v the output is "A verified" because verification stops after a
2810 successful redirection if more than one address is generated. However,
2811 with -v the child addresses are also verified. Exim was outputting "A
2812 failed to verify" and then showing the successful verification for C,
2813 with its parentage. It now outputs "B failed to verify", showing B's
2814 parentage before showing the successful verification of C.
2816 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
2817 look up a TXT record in a specific list after matching in a combined
2820 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
2821 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
2822 they consult the DNS. I had assumed they would set it the way they
2823 wanted; and indeed my experiments on Linux seem to show that in some
2824 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
2825 To be on the safe side, however, I have now made the interface to
2826 host_find_byname() similar to host_find_bydns(), with an argument
2827 containing the DNS resolver options. The host_find_byname() function now
2828 sets these options at its start, just as host_find_bydns() does. The smtp
2829 transport options dns_qualify_single and dns_search_parents are passed to
2830 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
2831 of host_find_byname() use the default settings of RES_DEFNAMES
2832 (qualify_single) but not RES_DNSRCH (search_parents).
2834 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
2835 spool_read_header() do less string testing, by means of a preliminary
2836 switch on the second character of optional "-foo" lines. (This is
2837 overdue, caused by the large number of possibilities that now exist.
2838 Originally there were few.) While I was there, I also converted the
2839 str(n)cmp tests so they don't re-test the leading "-" and the first
2840 character, in the hope this might squeeze out yet more improvement.
2842 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
2843 flag allowing group syntax was set by the header_syntax check but not
2844 turned off, possible causing trouble later; (2) The flag was not being
2845 set at all for the header_verify test, causing "group"-style headers to
2846 be rejected. I have now set it in this case, and also caused header_
2847 verify to ignore an empty address taken from a group. While doing this, I
2848 came across some other cases where the code for allowing group syntax
2849 while scanning a header line wasn't quite right (mostly, not resetting
2850 the flag correctly in the right place). These bugs could have caused
2851 trouble for malformed header lines. I hope it is now all correct.
2853 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
2854 with the "reply" argument non-NULL. The code, however (which originally
2855 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
2856 but it didn't always do it. This confused somebody who was copying the
2857 code for some other use. I have removed all the tests.
2859 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
2860 feature that was used to support insecure browsers during the U.S. crypto
2861 embargo. It requires special client support, and Exim is probably the
2862 only MTA that supported it -- and would never use it because real RSA is
2863 always available. This code has been removed, because it had the bad
2864 effect of slowing Exim down by computing (never used) parameters for the
2865 RSA_EXPORT functionality.
2867 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
2868 authenticator to fail if there's a tab character in the incoming data
2869 (there should never be unless someone is messing about, as it's supposed
2870 to be base64-encoded). Also added, on Timo's advice, the "secured" option
2871 if the connection is using TLS or if the remote IP is the same as the
2872 local IP, and the "valid-client-cert option" if a client certificate has
2875 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
2876 authenticators. This can be used for authorization after authentication
2877 succeeds. (In the case of plaintext, it servers for both authentication
2880 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
2881 if any retry times were supplied.
2883 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
2884 connection, where there is no client IP address to check. In this
2885 situation, the verify now always succeeds.
2887 PH/25 Applied John Jetmore's -Mset patch.
2889 PH/26 Added -bem to be like -Mset, but loading a message from a file.
2891 PH/27 In a string expansion for a processed (not raw) header when multiple
2892 headers of the same name were present, leading whitespace was being
2893 removed from all of them, but trailing whitespace was being removed only
2894 from the last one. Now trailing whitespace is removed from each header
2895 before concatenation. Completely empty headers in a concatenation (as
2896 before) are ignored.
2898 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
2899 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
2901 PH/29 [Removed. This was a change that I later backed out, and forgot to
2902 correct the ChangeLog entry (that I had efficiently created) before
2903 committing the later change.]
2905 PH/30 Exim was sometimes attempting to deliver messages that had suffered
2906 address errors (4xx response to RCPT) over the same connection as other
2907 messages routed to the same hosts. Such deliveries are always "forced",
2908 so retry times are not inspected. This resulted in far too many retries
2909 for the affected addresses. The effect occurred only when there were more
2910 hosts than the hosts_max_try setting in the smtp transport when it had
2911 the 4xx errors. Those hosts that it had tried were not added to the list
2912 of hosts for which the message was waiting, so if all were tried, there
2913 was no problem. Two fixes have been applied:
2915 (i) If there are any address or message errors in an SMTP delivery, none
2916 of the hosts (tried or untried) are now added to the list of hosts
2917 for which the message is waiting, so the message should not be a
2918 candidate for sending over the same connection that was used for a
2919 successful delivery of some other message. This seems entirely
2920 reasonable: after all the message is NOT "waiting for some host".
2921 This is so "obvious" that I'm not sure why it wasn't done
2922 previously. Hope I haven't missed anything, but it can't do any
2923 harm, as the worst effect is to miss an optimization.
2925 (ii) If, despite (i), such a delivery is accidentally attempted, the
2926 routing retry time is respected, so at least it doesn't keep
2927 hammering the server.
2929 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
2930 in ${readsocket because some servers need this prod.
2932 PH/32 Added some extra debug output when updating a wait-xxx database.
2934 PH/33 The hint "could be header name not terminated by colon", which has been
2935 given for certain expansion errors for a long time, was not being given
2936 for the ${if def:h_colon_omitted{... case.
2938 PH/34 The spec says: "With one important exception, whenever a domain list is
2939 being scanned, $domain contains the subject domain." There was at least
2940 one case where this was not true.
2942 PH/35 The error "getsockname() failed: connection reset by peer" was being
2943 written to the panic log as well as the main log, but it isn't really
2944 panic-worthy as it just means the connection died rather early on. I have
2945 removed the panic log writing for the ECONNRESET error when getsockname()
2948 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
2949 runs only) independently of the message's sender address. This meant
2950 that, if the 4xx error was in fact related to the sender, a different
2951 message to the same recipient with a different sender could confuse
2952 things. In particular, this can happen when sending to a greylisting
2953 server, but other circumstances could also provoke similar problems.
2954 I have changed the default so that the retry time for these errors is now
2955 based a combination of the sender and recipient addresses. This change
2956 can be overridden by setting address_retry_include_sender=false in the
2959 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
2960 remote server are returned as part of bounce messages. This was not
2961 happening for LMTP over a pipe (the lmtp transport), but now it is the
2962 same for both kinds of LMTP.
2964 PH/38 Despite being documented as not happening, Exim was rewriting addresses
2965 in header lines that were in fact CNAMEs. This is no longer the case.
2967 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
2968 and queue runs started by the daemon processed all messages. This has
2969 been fixed so that -R and -S can now usefully be given with -q<time>.
2971 PH/40 Import PCRE release 6.7 (fixes some bugs).
2973 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
2975 PH/42 Give an error if -q is specified more than once.
2977 PH/43 Renamed the variables $interface_address and $interface_port as
2978 $received_ip_address and $received_port, to make it clear that these
2979 values apply to message reception, and not to the outgoing interface when
2980 a message is delivered. (The old names remain recognized, of course.)
2982 PH/44 There was no timeout on the connect() call when using a Unix domain
2983 socket in the ${readsocket expansion. There now is.
2985 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
2986 be meaningful with "accept".
2988 SC/01 Eximstats V1.43
2989 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
2991 SC/02 Eximstats V1.44
2992 Use a glob alias rather than an array ref in the generated
2993 parser. This improves both readability and performance.
2995 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
2996 Collect SpamAssassin and rejection statistics.
2997 Don't display local sender or destination tables unless
2998 there is data to show.
2999 Added average volumes into the top table text output.
3001 SC/04 Eximstats V1.46
3002 Collect data on the number of addresses (recipients)
3003 as well as the number of messages.
3005 SC/05 Eximstats V1.47
3006 Added 'Message too big' to the list of mail rejection
3007 reasons (thanks to Marco Gaiarin).
3009 SC/06 Eximstats V1.48
3010 Mainlog lines which have GMT offsets and are too short to
3011 have a flag are now skipped.
3013 SC/07 Eximstats V1.49 (Alain Williams)
3014 Added the -emptyok flag.
3016 SC/08 Eximstats V1.50
3017 Fixes for obtaining the IP address from reject messages.
3019 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3020 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3021 whitespace changes from 4.64-PH/27
3023 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3026 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3027 are found, allow negative numbers in numeric criteria)
3029 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3031 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3032 to match changes made in 4.64-PH/43
3034 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3036 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3037 "domain" is actually an IP address, and force a failure. This locks out
3038 those revolvers/nameservers that support "A-for-A" lookups, in
3039 contravention of the specifications.
3041 PH/48 When a host name was looked up from an IP address, and the subsequent
3042 forward lookup of the name timed out, the host name was left in
3043 $sender_host_name, contrary to the specification.
3045 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3046 restricted to single-key lookups, Exim was not diagnosing an error if
3047 * or *@ was used with a query-style lookup.
3049 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3051 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3052 long ago, but noone interested enough thought of it. Let's just say that
3053 the "1.1" means that there are some new functions that weren't there at
3054 some point in the past.
3056 PH/51 Error processing for expansion failure of helo_data from an smtp
3057 transport during callout processing was broken.
3059 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3060 tested/used via the -bh/-bhc/-bs options.
3062 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3063 bug, fixed in subsequent PCRE releases).
3065 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3066 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3068 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3074 SC/01 Use a glob alias rather than an array ref in eximstats generated
3075 parser. This improves both readability and performance.
3077 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3078 Don't display local sender or destination tables in eximstats unless
3079 there is data to show.
3080 Added average volumes into the eximstats top table text output.
3082 SC/03 Collect data on the number of addresses (recipients) as well
3083 as the number of messages in eximstats.
3085 TF/01 Correct an error in the documentation for the redirect router. Exim
3086 does (usually) call initgroups() when daemonizing.
3088 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3089 with consistent privilege compared to when running as a daemon.
3091 TF/03 Note in the spec that $authenticated_id is not set for local
3092 submissions from trusted users.
3094 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3095 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3097 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3098 by adding some example configuration directives to the default
3099 configuration file. A little bit of work is required to uncomment the
3100 directives and define how usernames and passwords are checked, but
3101 there is now a framework to start from.
3103 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3104 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3105 without this. I don't know how relevant this is to other LDAP libraries.
3107 PH/02 Add the verb name to the "unknown ACL verb" error.
3109 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3111 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3113 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3114 directory not expanded when it should be if an expanded home directory
3115 was set for the address (which is overridden by the transport).
3117 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3120 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3121 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3122 because it is too late at that time, and has no effect.
3124 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3125 security issue with \' (bugzilla #107). I could not use the
3126 PQescapeStringConn() function, because it needs a PGconn value as one of
3129 PH/08 When testing addresses using -bt, indicate those final addresses that
3130 are duplicates that would not cause an additional delivery. At least one
3131 person was confused, thinking that -bt output corresponded to deliveries.
3132 (Suppressing duplicates isn't a good idea as you lose the information
3133 about possibly different redirections that led to the duplicates.)
3135 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3136 systems where poll() doesn't work, in particular OS X.
3138 PH/10 Added more information to debugging output for retry time not reached.
3140 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3141 operations in malware.c.
3143 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3146 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3147 syslog_duplication set false, log lines that would normally be written
3148 both the the main log and to the reject log were not written to syslog at
3151 PH/14 In the default configuration, change the use of "message" in ACL warn
3152 statements to "add_header".
3154 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3155 not followed by a command (e.g. "seen endif").
3157 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3158 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3161 PH/17 Added extra conditions to the default value of delay_warning_condition
3165 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3166 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3167 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3170 The Auto-Submitted: and various List- headers are standardised, whereas I
3171 don't think Precedence: ever was.
3173 PH/18 Refactored debugging code in route_finduser() to show more information,
3174 in particular, the error code if getpwnam() issues one.
3176 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3177 This is apparently needed in addition to the PH/07 change above to avoid
3178 any possible encoding problems.
3180 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3181 but not after initializing Perl.
3183 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3184 output them only if debugging. By default they are written stderr,
3185 apparently, which is not desirable.
3187 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3190 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3193 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3195 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3196 authenticated or an ident call has been made. Suppress the default
3197 values for $authenticated_id and $authenticated_sender (but permit -oMai
3198 and -oMas) when testing with -bh.
3200 PH/24 Re-jigged the order of the tests in the default configuration so that the
3201 tests for valid domains and recipients precede the DNS black list and CSA
3202 tests, on the grounds that those ones are more expensive.
3204 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3205 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3206 This bug exists in every version of Exim that I still have, right back to
3209 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3210 However, an attempt to turn on case-sensitivity in a regex key by
3211 including (?-i) didn't work because the subject string was already
3212 lowercased, and the effects were non-intuitive. It turns out that a
3213 one-line patch can be used to allow (?-i) to work as expected.
3219 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3220 other effects) broke the use of negated acl sub-conditions.
3222 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3225 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3226 "Deny" causes Exim to reject the incoming connection with a 554 error.
3227 Unfortunately, if there is a major crisis, such as a disk failure,
3228 tcp-wrappers gives "deny", whereas what one would like would be some
3229 kind of temporary error. A kludge has been added to help with this.
3230 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3231 554 error is used if errno is still zero or contains ENOENT (which occurs
3232 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3235 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3237 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3238 errors. Otherwise a message that provokes a temporary error (when other
3239 messages do not) can cause a whole host to time out.
3241 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3242 addresses were routed directly to files or pipes from a redirect router.
3243 File deliveries just didn't batch; pipe deliveries might have suffered
3246 PH/06 A failure to get a lock for a hints database would erroneously always say
3247 "Failed to get write lock", even when it was really a read lock.
3249 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3250 of 0600. This has been changed to use the value of the lockfile_mode
3251 option (which defaults to 0600).
3253 PH/08 Applied small patch from the Sieve maintainer.
3255 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3256 folder from quota calculations, a direct delivery into this folder messed
3257 up the contents of the maildirsize file. This was because the regex was
3258 used only to exclude .Trash (or whatever) when the size of the mailbox
3259 was calculated. There was no check that a delivery was happening into an
3260 excluded directory. This bug has been fixed by ignoring all quota
3261 processing for deliveries into excluded directories.
3263 PH/10 Added the maildirfolder_create_regex option to appendfile.
3269 PH/01 The code for finding all the local interface addresses on a FreeBSD
3270 system running IPv6 was broken. This may well have applied to all BSD
3271 systems, as well as to others that have similar system calls. The broken
3272 code found IPv4 interfaces correctly, but gave incorrect values for the
3273 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3274 that it would not match correctly against @[] and not recognize the IPv6
3277 PH/02 The ipliteral router was not recognizing addresses of the form user@
3278 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3280 PH/03 Added disable_ipv6.
3282 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3283 decoded form, because it is most often used to construct To: headers
3284 lines in autoreplies, and the decoded form may well be syntactically
3285 invalid. However, $reply_address has leading white space removed, and all
3286 newlines turned into spaces so that the autoreply transport does not
3289 PH/05 If group was specified without a user on a router, and no group or user
3290 was specified on a transport, the group from the router was ignored.
3292 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3293 for visible compile-time settings that can be used to change these
3294 numbers, for those that want even more. Backwards compatibility with old
3295 spool files has been maintained. However, going back to a previous Exim
3296 release will lost any variables that are in spool files.
3298 PH/07 Two small changes when running in the test harness: increase delay when
3299 passing a TCP/IP connection to a new process, in case the original
3300 process has to generate a bounce, and remove special handling of
3301 127.0.0.2 (sic), which is no longer necessary.
3303 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3304 be the same on different OS.
3306 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3309 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3310 whether --show-vars was specified or not
3312 JJ/02 exipick: Added support for new ACL variable spool format introduced
3315 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3316 syntactically invalid From: or Reply-to: line, and a filter used this to
3317 generate an autoreply, and therefore failed to obtain an address for the
3318 autoreply, Exim could try to deliver to a non-existent relative file
3319 name, causing unrelated and misleading errors. What now happens is that
3320 it logs this as a hard delivery error, but does not attempt to create a
3323 PH/11 The exinext utility has a -C option for testing purposes, but although
3324 the given file was scanned by exinext itself; it wasn't being passed on
3325 when Exim was called.
3327 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3328 an end-of-file indication when reading a command response.
3330 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3331 compiled. In many other places in Exim, IPv6 addresses are always
3332 recognized, so I have changed this. It also means that IPv4 domain
3333 literals of the form [IPV4:n.n.n.n] are now always recognized.
3335 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3336 used if the router is not running as root, for example, when verifying at
3337 ACL time, or when using -bh. The debugging output from this situation was
3338 non-existent - all you got was a failure to exec. I have made two
3341 (a) Failures to set uid/gid, the current directory, or a process leader
3342 in a subprocess such as that created by queryprogram now generate
3343 suitable debugging output when -d is set.
3345 (b) The queryprogram router detects when it is not running as root,
3346 outputs suitable debugging information if -d is set, and then runs
3347 the subprocess without attempting to change uid/gid.
3349 PH/15 Minor change to Makefile for building test_host (undocumented testing
3352 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3353 additional section of a DNS packet that returns MX or SRV records.
3354 Instead, it always explicitly searches for A/AAAA records. This avoids
3355 major problems that occur when a DNS server includes only records of one
3356 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3357 fixed another bug: if SRV records were looked up and the corresponding
3358 address records were *not* found in the additional section, the port
3359 values from the SRV records were lost.
3361 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3362 using the correct key (the original address) when searching the retry
3363 rules in order to find which one to use for generating the retry hint.
3365 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3366 adding the default one. Similarly, if it contains a Reply-To: header, the
3367 errors_reply_to option, if set, is not used.
3369 PH/19 When calculating a retry time, Exim used to measure the "time since
3370 failure" by looking at the "first failed" field in the retry record. Now
3371 it does not use this if it is later than than the arrival time of the
3372 message. Instead it uses the arrival time. This makes for better
3373 behaviour in cases where some deliveries succeed, thus re-setting the
3374 "first failed" field. An example is a quota failure for a huge message
3375 when small messages continue to be delivered. Without this change, the
3376 "time since failure" will always be short, possible causing more frequent
3377 delivery attempts for the huge message than are intended.
3378 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3380 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3381 $1, $2, $3) because the numerical variables can be reset during some
3382 expansion items (e.g. "match"), thereby losing the authentication data.
3384 PH/21 Make -bV show the size of off_t variables so that the test suite can
3385 decide whether to run tests for quotas > 2G.
3387 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3388 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3389 filecount value is greater than 2G or if a quota value is greater than 2G
3390 on a system where the size of off_t is not greater than 4, a panic error
3393 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3394 never match. The debug and -bh output now contains an explicit error
3395 message indicating a malformed IPv4 address or mask.
3397 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3398 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3399 PH/23 above applies.
3401 PH/25 Do not write to syslog when running in the test harness. The only
3402 occasion when this arises is a failure to open the main or panic logs
3403 (for which there is an explicit test).
3405 PH/26 Added the /no_tell option to "control=freeze".
3407 PH/27 If a host name lookup failed very early in a connection, for example, if
3408 the IP address matched host_lookup and the reverse lookup yielded a name
3409 that did not have a forward lookup, an error message of the form "no IP
3410 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3411 could be logged. Now it outputs the IP address instead of "NULL".
3413 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3414 allows the sender and the authenticated sender to be set when
3415 submitting a message from within Exim. Since child_open_exim() is
3416 documented for local_scan(), the new function should be too.
3418 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3419 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3420 results in an empty string is now treated as unset.
3422 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3424 PH/31 Added sender_verify_fail logging option.
3426 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3427 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3428 tidied the source and removed it altogether.
3430 PH/33 When a queue run was abandoned because the load average was too high, a
3431 log line was always written; now it is written only if the queue_run log
3432 selector is set. In addition, the log line for abandonment now contains
3433 information about the queue run such as the pid. This is always present
3434 in "start" and "stop" lines but was omitted from the "abandon" line.
3436 PH/34 Omit spaces between a header name and the colon in the error message that
3437 is given when verify = headers_syntax fails (if there are lots of them,
3438 the message gets confusing).
3440 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3441 names, as there are now some PTR records that contain slashes. This check
3442 is only to protect against broken name servers that fall over on strange
3443 characters, so the fact that it applies to all lookups doesn't matter.
3445 PH/36 Now that the new test suite is complete, we can remove some of the
3446 special code in Exim that was needed for the old test suite. For example,
3447 sorting DNS records because real resolvers return them in an arbitrary
3448 order. The new test suite's fake resolver always returns records in the
3451 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3452 bounces) except when queue_only is set, to avoid logging races between
3453 the different processes.
3455 PH/38 Panic-die if .include specifies a non-absolute path.
3457 PH/39 A tweak to the "H" retry rule from its user.
3459 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3460 a label. They prevented compilation on older perls.
3462 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3463 a warning to be raised on newish perls.
3465 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3466 on queue. Changes to match documented behaviour of showing count of
3467 messages matching specified criteria.
3469 PH/40 Changed the default ident timeout from 30s to 5s.
3471 PH/41 Added support for the use of login_cap features, on those BSD systems
3472 that have them, for controlling the resources used by pipe deliveries.
3474 PH/42 The content-scanning code uses fopen() to create files in which to put
3475 message data. Previously it was not paying any attention to the mode of
3476 the files. Exim runs with umask(0) because the rest of the code creates
3477 files with open(), and sets the required mode explicitly. Thus, these
3478 files were ending up world-writeable. This was not a big issue, because,
3479 being within the spool directory, they were not world-accessible. I have
3480 created a function called modefopen, which takes an additional mode
3481 argument. It sets umask(777), creates the file, chmods it to the required
3482 mode, then resets the umask. All the relevant calls to fopen() in the
3483 content scanning code have been changed to use this function.
3485 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3486 to 24 hours. This avoids potential overflow problems when processing G
3487 and H retry rules. I suspect nobody ever tinkers with this value.
3489 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3491 PH/45 When the plaintext authenticator is running as a client, the server's
3492 challenges are checked to ensure they are valid base64 strings. By
3493 default, the authentication attempt is cancelled if an invalid string is
3494 received. Setting client_ignore_invalid_base64 true ignores these errors.
3495 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3496 they are received. Thus, the responses can be made to depend on the
3497 challenges. If an invalid string is ignored, an empty string is placed in
3500 PH/46 Messages that are created by the autoreply transport now contains a
3501 References: header, in accordance with RFCs 2822 and 3834.
3503 PH/47 Added authenticated_sender_force to the smtp transport.
3505 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3507 PH/49 Installed latest patch from the Sieve maintainer.
3509 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3510 was also set, the appendfile transport was unnecessarily scanning a
3511 directory of message files (e.g. for maildir delivery) to find the count
3512 of files (along with the size), even though it did not need this
3513 information. It now does the scan only if it needs to find either the
3514 size of the count of files.
3516 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3518 PH/52 Two bugs concerned with error handling when the smtp transport is
3521 (i) Exim was not creating retry information for temporary errors given
3522 for individual recipients after the DATA command when the smtp transport
3523 was used in LMTP mode. This meant that they could be retried too
3524 frequently, and not timed out correctly.
3526 (ii) Exim was setting the flag that allows error details to be returned
3527 for LMTP errors on RCPT commands, but not for LMTP errors for individual
3528 recipients that were returned after the DATA command.
3530 PH/53 This is related to PH/52, but is more general: for any failing address,
3531 when detailed error information was permitted to be returned to the
3532 sender, but the error was temporary, then after the final timeout, only
3533 "retry timeout exceeded" was returned. Now it returns the full error as
3534 well as "retry timeout exceeded".
3536 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
3537 do this, and (what is worse) MTAs that accept it.
3539 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
3540 will now be deprecated.
3542 PH/56 New os.c-cygwin from the Cygwin maintainer.
3544 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
3545 formats (previously only available in exim formats via -bpr, -bpru,
3546 and -bpra. Now also available in native and exiqgrep formats)
3548 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
3549 with very large, slow to parse queues
3551 JJ/08 exipick: added ! as generic prefix to negate any criteria format
3553 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
3555 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
3556 responses to authentication challenges, though it was showing the
3557 challenges; (ii) I've removed the CR characters from the debug output for
3560 PH/58 Allow for the insertion of a newline as well as a space when a string
3561 is turned into more than one encoded-word during RFC 2047 encoding. The
3562 Sieve code now uses this.
3564 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
3565 data_4xx, lost_connection, tls_required.
3567 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
3568 message was being sent as an SMTP response.
3570 PH/61 Add -l and -k options to exicyclog.
3572 PH/62 When verifying, if an address was redirected to one new address, so that
3573 verification continued, and the new address failed or deferred after
3574 having set something in $address_data, the value of $address_data was not
3575 passed back to the ACL. This was different to the case when no
3576 redirection occurred. The value is now passed back in both cases.
3578 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
3579 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
3580 use login_cap.h, so on its own it isn't the distinguishing feature. The
3581 new name refers directly to the setclassresources() function.
3583 PH/65 Added configuration files for NetBSD3.
3585 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
3587 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
3588 is preferred over IPv4.
3590 PH/68 The bounce_return_message and bounce_return_body options were not being
3591 honoured for bounces generated during the reception of non-SMTP messages.
3592 In particular, this applied to messages rejected by the ACL. This bug has
3593 been fixed. However, if bounce_return_message is true and bounce_return_
3594 body is false, the headers that are returned for a non-SMTP message
3595 include only those that have been read before the error was detected.
3596 (In the case of an ACL rejection, they have all been read.)
3598 PH/69 The HTML version of the specification is now built in a directory called
3599 spec_html instead of spec.html, because the latter looks like a path with
3600 a MIME-type, and this confuses some software.
3602 PH/70 Catch two compiler warnings in sieve.c.
3604 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
3605 function verify_get_ident() calls ip_connect() to connect a socket, but
3606 if the "connect()" function timed out, ip_connect() used to close the
3607 socket. However, verify_get_ident() also closes the socket later, and in
3608 between Exim writes to the log, which may get opened at this point. When
3609 the socket was closed in ip_connect(), the log could get the same file
3610 descriptor number as the socket. This naturally causes chaos. The fix is
3611 not to close the socket in ip_connect(); the socket should be closed by
3612 the function that creates it. There was only one place in the code where
3613 this was missing, in the iplookup router, which I don't think anybody now
3614 uses, but I've fixed it anyway.
3616 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
3617 well as to direct DNS lookups. Otherwise the handling of names in host
3618 lists is inconsistent and therefore confusing.
3624 PH/01 Two changes to the default runtime configuration:
3626 (1) Move the checks for relay_from_hosts and authenticated clients from
3627 after to before the (commented out) DNS black list checks.
3629 (2) Add control=submission to the relay_from_hosts and authenticated
3630 clients checks, on the grounds that messages accepted by these
3631 statements are most likely to be submissions.
3633 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
3635 (1) Generate an error if the third argument for the ${prvs expansion is
3638 (2) Treat a missing third argument of ${prvscheck as if it were an empty
3641 (3) Reset the variables that are obtained from the first argument of
3642 ${prvscheck and used in the second argument before leaving the code,
3643 because their memory is reclaimed, so using them afterwards may do
3646 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
3647 one (it's much easier than Tom thought :-).
3649 (5) Because of (4), we can now allow for the use of $prvscheck_result
3650 inside the third argument.
3652 PH/03 For some reason, the default setting of PATH when running a command from
3653 a pipe transport was just "/usr/bin". I have changed it to
3656 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
3657 anything to be listed in the output from -bV.
3659 PH/05 When a filter generated an autoreply, the entire To: header line was
3660 quoted in the delivery log line, like this:
3662 => >A.N.Other <ano@some.domain> <original@ddress> ...
3664 This has been changed so that it extracts the operative address. There
3665 may be more than one such address. If so, they are comma-separated, like
3668 => >ano@some.domain,ona@other.domain <original@ddress> ...
3670 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
3671 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
3672 not being looked up in the rDNS to get a host name, Exim was showing the
3673 IP address twice in Received: lines, even though the IP addresses were
3674 identical. For example:
3676 Received: from [1.2.3.4] (helo=[1.2.3.4])
3678 However, if the real host name was known, it was omitting the HELO data
3679 if it matched the actual IP address. This has been tidied up so that it
3680 doesn't show the same IP address twice.
3682 PH/07 When both +timestamp and +memory debugging was on, the value given by
3683 $tod_xxx expansions could be wrong, because the tod_stamp() function was
3684 called by the debug printing, thereby overwriting the timestamp buffer.
3685 Debugging no longer uses the tod_stamp() function when +timestamp is set.
3687 PH/08 When the original message was included in an autoreply transport, it
3688 always said "this is a copy of the message, including all the headers",
3689 even if body_only or headers_only was set. It now gives an appropriate
3692 PH/09 Applied a patch from the Sieve maintainer which:
3694 o fixes some comments
3695 o adds the (disabled) notify extension core
3696 o adds some debug output for the result of if/elsif tests
3697 o points to the current vacation draft in the documentation
3698 and documents the missing references header update
3702 o fixes a bug in processing the envelope test (when testing
3703 multiple envelope elements, the last element determined the
3706 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
3707 Electronic Mail") by including:
3709 Auto-submitted: auto-generated
3711 in the messages that it generates (bounce messages and others, such as
3712 warnings). In the case of bounce messages for non-SMTP messages, there was
3713 also a typo: it was using "Auto_submitted" (underscore instead of
3714 hyphen). Since every message generated by Exim is necessarily in response
3715 to another message, thes have all been changed to:
3717 Auto-Submitted: auto-replied
3719 in accordance with these statements in the RFC:
3721 The auto-replied keyword:
3723 - SHOULD be used on messages sent in direct response to another
3724 message by an automatic process,
3726 - MUST NOT be used on manually-generated messages,
3728 - MAY be used on Delivery Status Notifications (DSNs) and Message
3729 Disposition Notifications (MDNs),
3731 - MUST NOT be used on messages generated by automatic or periodic
3732 processes, except for messages which are automatic responses to
3735 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
3736 to the default Received: header definition.
3738 PH/12 Added log selector acl_warn_skipped (default on).
3740 PH/13 After a successful wildlsearch lookup, discard the values of numeric
3741 variables because (a) they are in the wrong storage pool and (b) even if
3742 they were copied, it wouldn't work properly because of the caching.
3744 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
3745 checking when decoding. Apparently there are clients that generate
3746 overlong encoded strings. Why am I not surprised?
3748 PH/15 If the first argument of "${if match_address" was not empty, but did not
3749 contain an "@" character, Exim crashed. Now it writes a panic log message
3750 and treats the condition as false.
3752 PH/16 In autoreply, treat an empty string for "once" the same as unset.
3754 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
3755 extension "envelope-auth". The code is finished and in agreement with
3756 other implementations, but there is no documentation so far and in fact,
3757 nobody wrote the draft yet. This extension is currently #undef'ed, thus
3758 not changing the active code.
3760 Print executed "if" and "elsif" statements when debugging is used. This
3761 helps a great deal to understand what a filter does.
3763 Document more things not specified clearly in RFC3028. I had all this
3764 sorted out, when out of a sudden new issues came to my mind. Oops."
3766 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
3769 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
3770 canonical form (as documented). However, after a host name lookup from
3771 the IP address, check_host() was doing a simple string comparison with
3772 addresses acquired from the DNS when checking that the found name did
3773 have the original IP as one of its addresses. Since any found IPv6
3774 addresses are likely to be in abbreviated form, the comparison could
3775 fail. Luckily, there already exists a function for doing the comparison
3776 by converting both addresses to binary, so now that is used instead of
3777 the text comparison.
3779 PH/20 There was another similar case to PH/19, when a complete host name was
3780 given in a host list; looking up its IP address could give an abbreviated
3781 form, whereas the current host's name might or might not be abbreviated.
3782 The same fix has been applied.
3788 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
3789 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
3792 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
3793 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
3795 PH/03 Typo: missing ".o" in src/pcre/Makefile.
3797 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
3798 header line, restrict the check to what is listed in RFCs 2369 and 2929.
3799 Also, for "Auto-Submitted", treat anything other than "no" as
3800 non-personal, in accordance with RFC 3834. (Previously it treated
3801 anything starting "auto-" as non-personal.)
3803 TF/01 The control=submission/name=... option had a problem with syntax
3804 errors if the name included a slash character. The /name= option
3805 now slurps the rest of the string, so it can include any characters
3806 but it must come last in the list of options (after /sender_retain
3809 PH/05 Some modifications to the interface to the fake nameserver for the new
3817 TK/01 Added the "success_on_redirect" address verification option. See
3818 NewStuff for rationale and an example.
3820 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
3822 PH/02 Patch to exigrep to allow it to work on syslog lines.
3824 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
3825 fread() to skip over the body file's header line, because in Cygwin the
3826 header line is locked and is inaccessible.
3828 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
3829 co-exist for some time) to make it clear that it is the Exim ID that is
3830 referenced, not the Message-ID: header line.
3832 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
3833 string_format() function, because snprintf() does not exist on all
3836 PH/06 The use of forbid_filter_existstest now also locks out the use of the
3837 ${stat: expansion item.
3839 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
3840 protocol synchronization error", to keep the pedants happy.
3842 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
3843 well as for IRIX systems, when gcc is being used. See the host.c source
3846 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
3848 PH/10 Named domain lists were not working if used in a queue_smtp_domains
3851 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
3852 transport and to the smtp transport in LMTP mode.
3854 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
3856 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
3857 run a filter in a subprocess. This could lead to confusion in subsequent
3858 lookups in the parent process. There should also be a search_tidyup() at
3859 the end of the subprocess.
3861 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
3862 only if the host matched helo_try_verify_hosts, which caused the
3863 verification to occur when the EHLO/HELO command was issued. The ACL just
3864 tested the remembered result. Now, if a previous verification attempt has
3865 not happened, "verify = helo" does it there and then.
3867 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
3869 TK/03 Fix log output including CR from clamd.
3871 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
3872 exist provoked a memory error which could cause a segfault.
3874 PH/15 Installed PCRE 6.2
3876 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
3878 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
3879 of the problem. Specifically, suggested +O2 rather than +O1 for the
3882 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
3884 PH/20 If a delivery was routed to a non-standard port by means of an SRV
3885 record, the port was not correctly logged when the outgoing_port log
3886 selector was set (it logged the transort's default port).
3888 PH/21 Added support for host-specific ports to manualroute, queryprogram,
3889 fallback_hosts, and "hosts" in the smtp transport.
3891 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
3892 host errors such as "Connection refused".
3894 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
3895 authentication with radiusclient 0.4.9:
3897 - Error returned from rc_read_config was caught wrongly
3898 - Username/password not passed on to radius server due to wrong length.
3900 The presumption is that some radiusclient API changes for 4.51/PH/17
3901 were not taken care of correctly. The code is still untested by me (my
3902 Linux distribution still has 0.3.2 of radiusclient), but it was
3903 contributed by a Radius user.
3905 PH/24 When doing a callout, the value of $domain wasn't set correctly when
3906 expanding the "port" option of the smtp transport.
3908 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
3909 while reading a MIME header. Thanks to Tom Hughes for a patch.
3911 PH/24 Include config.h inside local_scan.h so that configuration settings are
3914 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
3915 that in an ACL for RCPT (for example), you can examine exactly what was
3918 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
3919 commands, but it was not correctly comparing the address with the actual
3920 client host address. Thus, it would show the EHLO address in Received:
3921 header lines when this was not necessary.
3923 PH/27 Added the % operator to ${eval:}.
3925 PH/28 Exim tries to create and chdir to its spool directory when it starts;
3926 it should be ignoring failures (because with -C, for example, it has lost
3927 privilege). It wasn't ignoring creation failures other than "already
3930 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
3933 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
3934 because an input line was too long, either on its own, or by virtue of
3935 too many continuations, the temporary file was not being removed, and the
3936 return code was incorrect.
3938 PH/31 Missing "BOOL" in function definition in filtertest.c.
3940 PH/32 Applied Sieve patches from the maintainer.
3942 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
3944 PH/33 Added "verify = not_blind".
3946 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
3947 Local/Makefile (with some defaults set). These are used in built scripts
3948 such as exicyclog, but they have never been used in the exim_install
3949 script (though there are many overriding facilities there). I have
3950 arranged that the exim_install script now takes note of these two
3953 PH/35 Installed configuration files for Dragonfly.
3955 PH/36 When a locally submitted message by a trusted user did not contain a
3956 From: header, and the sender address was obtained from -f or from an SMTP
3957 MAIL command, and the trusted user did not use -F to supply a sender
3958 name, $originator_name was incorrectly used when constructing a From:
3959 header. Furthermore, $originator_name was used for submission mode
3960 messages from external hosts without From: headers in a similar way,
3961 which is clearly wrong.
3963 PH/37 Added control=suppress_local_fixups.
3965 PH/38 When log_selector = +received_sender was set, and the addition of the
3966 sender made the log line's construction buffer exactly full, or one byte
3967 less than full, an overflow happened when the terminating "\n" was
3970 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
3971 when the result of a list match is failure because a DNS lookup failed.
3973 PH/40 RM_COMMAND is now used in the building process.
3975 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
3976 the "build-* directories that it finds.
3978 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
3979 address in a domain literal was a prefix of an interface address.
3981 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
3982 when verifying a sender address, unless rewrite_headers is false.
3984 PH/44 Wrote a long comment about why errors_to addresses are verified as
3985 recipients, not senders.
3987 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
3988 the ratelimit ACL was added.
3990 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
3992 PH/46 Added extra information about PostgreSQL errors to the error string.
3994 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
3995 avoiding the need to install special zones in a real server. This is
3996 backwards compatible; if it can't find the fake resolver, it drops back.
3997 Thus, both old and new test suites can be run.
3999 TF/02 Added util/ratelimit.pl
4001 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4002 clock is set back in time.
4004 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4005 Candler <B.Candler@pobox.com>.
4007 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4008 OK for addresses that are the result of redirections.
4010 PH/48 A number of further additions for the benefit of the new test suite,
4011 including a fake gethostbyname() that interfaces to the fake DNS resolver
4014 TF/06 The fix for widen_domains has also been applied to qualify_single and
4015 search_parents which are the other dnslookup options that can cause
4018 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4021 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4023 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4024 service" if it encountered an MX record with an empty target hostname.
4025 The message is now "an MX or SRV record indicated no SMTP service".
4027 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4028 if the DNS of the sending site is misconfigured. This is quite a
4029 common situation. This change restores the behaviour of treating a
4030 helo verification defer as a failure.
4032 PH/51 If self=fail was set on a router, the bounce message did not include the
4033 actual error message.
4039 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4041 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4042 command itself ended in error, the underlying message about the transport
4043 filter timeout was being overwritten with the pipe command error. Now the
4044 underlying error message should be appended to the second error message.
4046 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4048 PH/02 Reduce the amount of output that "make" produces by default. Full output
4049 can still be requested.
4051 PH/03 The warning log line about a condition test deferring for a "warn" verb
4052 was being output only once per connection, rather than after each
4053 occurrence (because it was using the same function as for successful
4054 "warn" verbs). This seems wrong, so I have changed it.
4056 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4057 it should not have, which might have caused a crash in the right
4058 circumstances, but probably never did.
4060 PH/04 Installed a modified version of Tony Finch's patch to make submission
4061 mode fix the return path as well as the Sender: header line, and to
4062 add a /name= option so that you can make the user's friendly name appear
4065 TF/03 Added the control = fakedefer ACL modifier.
4067 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4068 Mark Lowes for thorough testing.
4070 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4072 TK/03 Merged latest SRS patch from Miles Wilton.
4074 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4075 with the definition in sysexits.h (which is #included earlier).
4076 Fortunately, Exim does not actually use EX_OK. The code used to try to
4077 preserve the sysexits.h value, by assuming that macro definitions were
4078 scanned for macro replacements. I have been disabused of this notion,
4079 so now the code just undefines EX_OK before #including unistd.h.
4081 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4082 in the smtp transport. When a block could not be written in a single
4083 write() function, the timeout was being re-applied to each part-write.
4084 This seems wrong - if the receiver was accepting one byte at a time it
4085 would take for ever. The timeout is now adjusted when this happens. It
4086 doesn't have to be particularly precise.
4088 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4089 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4091 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4092 without a domain if the check to <postmaster@domain> fails.
4094 SC/01 Eximstats: added -xls and the ability to specify output files
4095 (patch written by Frank Heydlauf).
4097 SC/02 Eximstats: use FileHandles for outputting results.
4099 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4101 SC/04 Eximstats: fixed display of large numbers with -nvr option
4103 SC/05 Eximstats: fixed merging of reports with empty tables.
4105 SC/06 Eximstats: added the -include_original_destination flag
4107 SC/07 Eximstats: removed tabs and trailing whitespace.
4109 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4111 TK/06 MBOX spool code: Add real "From " MBOX separator line
4112 so the .eml file is really in mbox format (even though
4113 most programs do not really care). Patch from Alex Miller.
4115 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4116 The latter is generated from $received_to and is only set if the
4117 message has one envelope recipient. SA can use these headers,
4118 obviously out-of-the-box. Patch from Alex Miller.
4120 PH/08 The ${def test on a variable was returning false if the variable's
4121 value was "0", contrary to what the specification has always said!
4122 The result should be true unless the variable is empty.
4124 PH/09 The syntax error of a character other than { following "${if
4125 def:variable_name" (after optional whitespace) was not being diagnosed.
4126 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4127 accidental colon was present, for example, could give incorrect results.
4129 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4130 result is used (not including appendfile, where other changes are about
4133 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4134 This involved changing a lot of size variables from int to off_t. It
4135 should work with maildirs and everything.
4137 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4138 spamd dying while we are connected to it.
4140 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4143 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4144 function for BDB 4.3.
4146 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4148 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4149 the sources for PCRE have been re-arranged and more files are now
4152 PH/15 The code I had for printing potentially long long variables in PH/11
4153 above was not the best (it lost precision). The length of off_t variables
4154 is now inspected at build time, and an appropriate printing format (%ld
4155 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4156 to be "long long int" or "long int". This is needed for the internal
4157 formatting function string_vformat().
4159 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4160 the configuration file to be ":syslog", then the script "guesses" where
4161 the logs files are, rather than using the compiled in default. In our
4162 case the guess is not the same as the compiled default, so the script
4163 suddenly stopped working when I started to use syslog. The patch checks
4164 to see if log_file_path is "". If so, it attempts to read it from exim
4165 with no configuration file to get the compiled in version, before it
4166 falls back to the previous guessing code."
4168 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4169 implementing BATV in an Exim configuration. See NewStuff for the gory
4172 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4173 Makefile that are specific to HP-UX.
4175 PH/18 If the "use_postmaster" option was set for a recipient callout together
4176 with the "random" option, the postmaster address was used as the MAIL
4177 FROM address for the random test, but not for the subsequent recipient
4178 test. It is now used for both.
4180 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4181 patch removes a few documentation additions to RFC 3028, because the
4182 latest draft now contains them. It adds the new en;ascii-case comparator
4183 and a new error check for 8bit text in MIME parts. Comparator and
4184 require names are now matched exactly. I enabled the subaddress
4185 extension, but it is not well tested yet (read: it works for me)."
4187 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4188 rework some of the code of TK/09 above to avoid the hardwired use of
4189 "%lld" and "long long". Replaced the call to snprintf() with a call to
4192 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4193 records point to non-existent hosts", "retry timeout exceeded", and
4194 "retry time not reached for any host after a long failure period".
4196 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4197 experimental DomainKeys support:
4199 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4200 (2) On an error such as an illegally used "control", the wrong name for
4201 the control was given.
4203 These problems did NOT occur unless DomainKeys support was compiled.
4205 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4207 PH/24 Added ${if match_ip condition.
4209 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4210 databases so that it will be absolutely obvious if a crash occurs in the
4211 DB library. This is a regular occurrence (often caused by mis-matched
4214 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4215 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4216 picked up on a user's system that detects such things. There doesn't seem
4217 to be a gcc warning option for this - only an attribute that has to be
4218 put on the function's prototype. It seems that in Fedora Core 4 they have
4219 set this on a number of new functions. No doubt there will be more in due
4222 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4223 specify a transport. However, if an address that was verified by such a
4224 router was the subject of a callout, Exim crashed because it tried to
4225 read the rcpt_include_affixes from the non-existent transport. Now it
4226 just assumes that the setting of that option is false. This bug was
4227 introduced by 4.51/PH/31.
4229 PH/28 Changed -d+all to exclude +memory, because that information is very
4230 rarely of interest, but it makes the output a lot bigger. People tend to
4231 do -d+all out of habit.
4233 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4234 code in os-type was giving problems when libc.so lives in lib64, like on
4237 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4238 aren't the modern standard, and it seems that some systems' include files
4239 don't always have them. Exim was already checking for some of the newer
4240 ones like T_AAAA, and defining it itself. I've added checks for all the
4241 record types that Exim uses.
4243 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4244 not automatically generating a new one, as it is supposed to. This
4245 prevented TLS from working. If the file did exist, but contained invalid
4246 data, a new version was generated, as expected. It was only the case of a
4247 non-existent file that was broken.
4249 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4250 with a change in libdomainkeys > 0.64.
4252 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4253 from DNS. If the selector record carries the flag, it now has
4254 precedence over the domain-wide flag.
4256 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4258 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4259 the use of a port name that isn't defined in /etc/services) occurred, the
4260 message was deferred as in a normal delivery, and thus remained on the
4261 spool, instead of being failed because of the mua_wrapper setting. This
4262 is now fixed, and I tidied up some of the mua_wrapper messages at the
4265 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4266 the messages in a hash of arrays rather than using individual hashes.
4267 This is a bit cleaner and results in dramatic memory savings, albeit
4268 at a slight CPU cost.
4270 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4271 as requested by Marc Sherman.
4273 SC/10 Eximstats: added histograms for user specified patterns as requested
4276 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4278 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4279 fopen() in the content-scanning modules that did not already have it.
4285 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4286 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4288 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4290 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4292 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4293 to test Sieve filters that use "vacation".
4295 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4296 that changes the way the GnuTLS parameters are stored in the cache file.
4297 The new format can be generated externally. For backward compatibility,
4298 if the data in the cache doesn't make sense, Exim assumes it has read an
4299 old-format file, and it generates new data and writes a new file. This
4300 means that you can't go back to an older release without removing the
4303 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4304 work if there are any delivery delays because "one_time" forces the
4305 parent to be marked "delivered", so its unseen clone is never tried
4306 again. For this reason, Exim now forbids the simultaneous setting of
4309 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4310 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4311 entry if you want to know the details. The fix, however, neglected to
4312 consider the case when local delivery batching is involved. The test for
4313 "previously delivered" was not happening when checking to see if an
4314 address could be batched with a previous (undelivered) one; under
4315 certain circumstances this could lead to multiple deliveries to the same
4318 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4319 in its include files, and this causes problems building Exim.
4321 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4322 header_syntax) but Exim was just ignoring anything given after a slash.
4323 In particular, this caused confusion with an attempt to use "verify =
4324 reverse_host_lookup/defer_ok". An error is now given when options are
4325 supplied for verify items that do not have them. (Maybe reverse_host_
4326 lookup should have a defer_ok option, but that's a different point.)
4328 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4329 defined by RFC 821) to 2048, because there were problems with some AUTH
4330 commands, and RFC 1869 says the size should be increased for extended
4331 SMTP commands that take arguments.
4333 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4336 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4337 "unknown" error; now it says that the functionality isn't in the binary.
4339 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4340 an address' error message when a string expansion fails (syntax or
4341 whatever). Otherwise the password may appear in the log. Following change
4342 PH/42 below, there is no longer a chance of it appearing in a bounce
4345 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4347 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4348 of its addresses was ever tried. (Bugzilla bug #2.)
4350 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4351 the result incorrectly in the debug output. (It correctly added a newline
4352 to what was transported.)
4354 TF/01 Added $received_time.
4356 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4357 commented out examples of how to interface to a virus scanner and to
4358 SpamAssassin. Also added commented examples of av_scanner and
4359 spamd_address settings.
4361 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4362 and controls are allowed in which ACLs. There were a couple of minor
4363 errors. Some of the entries in the conditions table (which is a table of
4364 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4365 negation of where the condition IS allowed.
4367 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4369 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4370 header file does not have a version number, so I've had to invent a new
4371 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4372 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4373 radiusclient), but it was contributed by a Radius user.
4375 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4376 files or directories, for OpenSSL.
4378 PH/19 When an Exim process that is running as root has to create an Exim log
4379 file, it does so in a subprocess that runs as exim:exim so as to get the
4380 ownership right at creation (otherwise, other Exim processes might see
4381 the file with the wrong ownership). There was no test for failure of this
4382 fork() call, which would lead to the process getting stuck as it waited
4383 for a non-existent subprocess. Forks do occasionally fail when resources
4384 run out. I reviewed all the other calls to fork(); they all seem to check
4387 PH/20 When checking for unexpected SMTP input at connect time (before writing
4388 the banner), Exim was not dealing correctly with a non-positive return
4389 from the read() function. If the client had disconnected by this time,
4390 the result was a log entry for a synchronization error with an empty
4391 string after "input=" when read() returned zero. If read() returned -1
4392 (an event I could not check), uninitialized data bytes were printed.
4393 There were reports of junk text (parts of files, etc) appearing after
4396 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4398 PH/22 Added support for macro redefinition, and (re)definition in between
4399 driver and ACL definitions.
4401 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4402 forgetting to use the resulting value; it was using the unexpanded value.
4404 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4405 hadn't been configured. The fix is from Juergen Kreileder, who
4406 understands it better than I do:
4408 "Here's what I see happening with three configured cyrus_sasl
4409 authenticators configured (plain, login, cram-md5):
4411 On startup auth_cyrus_sasl_init() gets called for each of these.
4412 This means three calls to sasl_listmech() without a specified mech_list.
4413 => SASL tests which mechs of all available mechs actually work
4414 => three warnings about OTP not working
4415 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4417 With the patch, sasl_listmech() also gets called three times. But now
4418 SASL's mech_list option is set to the server_mech specified in the the
4419 authenticator. Or in other words, the answer from sasl_listmech()
4420 gets limited to just the mech you're testing for (which is different
4422 => the return list contains just 'plain' or 'login', 'cram-md5' or
4423 nothing depending on the value of ob->server_mech.
4425 I've just tested the patch: Authentication still works fine,
4426 unavailable mechs specified in the exim configuration are still
4427 caught, and the auth.log warnings about OTP are gone."
4429 PH/25 When debugging is enabled, the contents of the command line are added
4430 to the debugging output, even when log_selector=+arguments is not
4433 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4434 answer is "GNU", and only if the return is "GNU/something" is the answer
4437 PH/27 $acl_verify_message is now set immediately after the failure of a
4438 verification in an ACL, and so is available in subsequent modifiers. In
4439 particular, the message can be preserved by coding like this:
4441 warn !verify = sender
4442 set acl_m0 = $acl_verify_message
4444 Previously, $acl_verify_message was set only while expanding "message"
4445 and "log_message" when a very denied access.
4447 PH/28 Modified OS/os.c-Linux with
4449 -#ifndef OS_LOAD_AVERAGE
4450 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4452 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4453 nomenclature these days.)
4455 PH/29 Installed patch from the Sieve maintainer that adds the options
4456 sieve_useraddress and sieve_subaddress to the redirect router.
4458 PH/30 In these circumstances:
4459 . Two addresses routed to the same list of hosts;
4460 . First host does not offer TLS;
4461 . First host accepts first address;
4462 . First host gives temporary error to second address;
4463 . Second host offers TLS and a TLS session is established;
4464 . Second host accepts second address.
4465 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4466 and peerdn, if requested) that were in fact used only for the second
4469 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4470 attention to any local part prefix or suffix that was matched by the
4471 router that accepted the address. It now behaves in the same way as it
4472 does for delivery: the affixes are removed from the local part unless
4473 rcpt_include_affixes is set on the transport.
4475 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4476 timeout during the DATA phase of an incoming message.
4478 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4479 applied a patch sanctioned by the Sieve maintainer.
4481 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4482 the uid or gid is negative. A case of a negative gid caused this to be
4483 noticed. The fix allows for either to be negative.
4485 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4486 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4489 PH/36 The change PH/12 above was broken. Fixed it.
4491 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4492 the grounds that routing the same address twice would always produce the
4493 same answer. This might have been true once, but it is certainly no
4494 longer true now. Routing a child address may depend on the previous
4495 routing that produced that child. Some complicated redirection strategies
4496 went wrong when messages had multiple recipients, and made Exim's
4497 behaviour dependent on the order in which the addresses were given.
4499 I have moved the duplicate checking until after the routing is complete.
4500 Exim scans the addresses that are assigned to local and remote
4501 transports, and removes any duplicates. This means that more work will be
4502 done, as duplicates will always all be routed, but duplicates are
4503 presumably rare, so I don't expect this is of any significance.
4505 For deliveries to pipes, files, and autoreplies, the duplicate checking
4506 still happens during the routing process, since they are not going to be
4509 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4510 It corrects a timeout issue with spamd. This is Ian's comment: "The
4511 background is that sometimes spamd either never reads data from a
4512 connection it has accepted, or it never writes response data. The exiscan
4513 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4514 blindly assumes that writes won't block so it may never time out."
4516 PH/39 Allow G after quota size as well as K and M.
4518 PH/40 The value set for $authenticated_id in an authenticator may not contain
4519 binary zeroes or newlines because the value is written to log lines and
4520 to spool files. There was no check on this. Now the value is run through
4521 the string_printing() function so that such characters are converted to
4522 printable escape sequences.
4524 PH/41 $message_linecount is a new variable that contains the total number of
4525 lines in the message. Compare $body_linecount, which is the count for the
4528 PH/42 Exim no longer gives details of delivery errors for specific addresses in
4529 bounce and delay warning messages, except in certain special cases, which
4532 (a) An SMTP error message from a remote host;
4533 (b) A message specified in a :fail: redirection;
4534 (c) A message specified in a "fail" command in a system filter;
4535 (d) A message specified in a FAIL return from the queryprogram router;
4536 (e) A message specified by the cannot_route_message router option.
4538 In these cases only, Exim does include the error details in bounce and
4539 warning messages. There are also a few cases where bland messages such
4540 as "unrouteable address" or "local delivery error" are given.
4542 PH/43 $value is now also set for the "else" part of a ${run expansion.
4544 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
4545 being worked on, but at least Exim now implements the latest version to
4548 PH/45 In a pipe transport, although a timeout while waiting for the pipe
4549 process to complete was treated as a delivery failure, a timeout while
4550 writing the message to the pipe was logged, but erroneously treated as a
4551 successful delivery. Such timeouts include transport filter timeouts. For
4552 consistency with the overall process timeout, these timeouts are now
4553 treated as errors, giving rise to delivery failures by default. However,
4554 there is now a new Boolean option for the pipe transport called
4555 timeout_defer, which, if set TRUE, converts the failures into defers for
4556 both kinds of timeout. A transport filter timeout is now identified in
4559 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
4560 systems where "make" and "gmake" are different, calling "gmake" at top
4561 level broke things. I've arranged for the value of $(MAKE) to be passed
4562 from the Makefile to this script so that it can call the same version of
4566 A note about Exim versions 4.44 and 4.50
4567 ----------------------------------------
4569 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
4570 changes of various kinds. As a consequence, a big documentation update was
4571 needed. This delayed the release for rather longer than seemed good, especially
4572 in the light of a couple of (minor) security issues. Therefore, the changes
4573 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
4574 release. So 4.44 and 4.50 are in effect two different branches that both start
4577 I have left the 4.50 change log unchanged; it contains all the changes since
4578 4.43. The change log for 4.44 is below; many of its items are identical to
4579 those for 4.50. This seems to be the most sensible way to preserve the
4580 historical information.
4586 1. Minor wording change to the doc/README.SIEVE file.
4588 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
4589 computation of the current number of files was incorrect.
4591 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4592 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4595 4. Give more explanation in the error message when the command for a transport
4596 filter fails to execute.
4598 5. There are several places where Exim runs a non-Exim command in a
4599 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4600 was being done only for the command run by the queryprogram router. It is
4601 now done for all such subprocesses. The other cases are: ${run, transport
4602 filters, and the commands run by the lmtp and pipe transports.
4604 6. Added CONFIGURE_GROUP build-time option.
4606 7. Some older OS have a limit of 256 on the maximum number of file
4607 descriptors. Exim was using setrlimit() to set 1000 as a large value
4608 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4609 systems. I've change it so that if it can't get 1000, it tries for 256.
4611 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4612 was an oversight, and furthermore, ever since the addition of extra
4613 controls (e.g. 4.43/32), the checks on when to allow different forms of
4614 "control" were broken. There should now be diagnostics for all cases when a
4615 control that does not make sense is encountered.
4617 9. Added the /retain_sender option to "control=submission".
4619 10. $recipients is now available in the predata ACL (oversight).
4621 11. Tidy the search cache before the fork to do a delivery from a message
4622 received from the command line. Otherwise the child will trigger a lookup
4623 failure and thereby defer the delivery if it tries to use (for example) a
4624 cached ldap connection that the parent has called unbind on.
4626 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
4627 of $address_data from the recipient verification was clobbered by the
4628 sender verification.
4630 13. The value of address_data from a sender verification is now available in
4631 $sender_address_data in subsequent conditions in the ACL statement.
4633 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
4635 15. Added a new option "connect=<time>" to callout options, to set a different
4638 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
4639 was its contents. (It was OK if the option was not defined at all.)
4641 17. A "Completed" log line is now written for messages that are removed from
4642 the spool by the -Mrm option.
4644 18. New variables $sender_verify_failure and $recipient_verify_failure contain
4645 information about exactly what failed.
4647 19. Added -dd to debug only the daemon process.
4649 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
4650 handles timeouts, both on the server side and network timeouts. Renamed the
4651 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
4653 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
4654 It is now set to "smtps".
4656 22. $host_address is now set to the target address during the checking of
4657 ignore_target_hosts.
4659 23. When checking ignore_target_hosts for an ipliteral router, no host name was
4660 being passed; this would have caused $sender_host_name to have been used if
4661 matching the list had actually called for a host name (not very likely,
4662 since this list is usually IP addresses). A host name is now passed as
4665 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
4666 code that specifies a non-restarting handler (typically sigaction() in
4667 modern systems) in an attempt to fix a rare and obscure crash bug.
4669 25. Narrowed the window for a race in the daemon that could cause it to ignore
4670 SIGCHLD signals. This is not a major problem, because they are used only to
4671 wake it up if nothing else does.
4673 26. A malformed maildirsize file could cause Exim to calculate negative values
4674 for the mailbox size or file count. Odd effects could occur as a result.
4675 The maildirsize information is now recalculated if the size or filecount
4678 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
4679 support for a long time. Removed HAVE_SYS_VFS_H.
4681 28. Installed the latest version of exipick from John Jetmore.
4683 29. In an address list, if the pattern was not a regular expression, an empty
4684 subject address (from a bounce message) matched only if the pattern was an
4685 empty string. Non-empty patterns were not even tested. This was the wrong
4686 because it is perfectly reasonable to use an empty address as part of a
4687 database query. An empty address is now tested by patterns that are
4688 lookups. However, all the other forms of pattern expect the subject to
4689 contain a local part and a domain, and therefore, for them, an empty
4690 address still always fails if the pattern is not itself empty.
4692 30. Exim went into a mad DNS loop when attempting to do a callout where the
4693 host was specified on an smtp transport, and looking it up yielded more
4694 than one IP address.
4696 31. Re-factored the code for checking spool and log partition space into a
4697 function that finds that data and another that does the check. The former
4698 is then used to implement four new variables: $spool_space, $log_space,
4699 $spool_inodes, and $log_inodes.
4701 32. The RFC2047 encoding function was originally intended for short strings
4702 such as real names; it was not keeping to the 75-character limit for
4703 encoded words that the RFC imposes. It now respects the limit, and
4704 generates multiple encoded words if necessary. To be on the safe side, I
4705 have increased the buffer size for the ${rfc2047: expansion operator from
4708 33. It is now permitted to omit both strings after an "if" condition; if the
4709 condition is true, the result is "true". As before, when the second string
4710 is omitted, a false condition yields an empty string. This makes it less
4711 cumbersome to write custom ACL and router conditions.
4713 34. Failure to deliver a bounce message always caused it to be frozen, even if
4714 there was an errors_to setting on the router. The errors_to setting is now
4717 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
4718 canonical form (fully expanded) before being placed in
4719 $sender_host_address.
4721 36. The table in the code that translates DNS record types into text (T_A to
4722 "A" for instance) was missing entries for NS and CNAME. It is just possible
4723 that this could have caused confusion if both these types were looked up
4724 for the same domain, because the text type is used as part of Exim's
4725 per-process caching. But the chance of anyone hitting this buglet seems
4728 37. The dnsdb lookup has been extended in a number of ways.
4730 (1) There is a new type, "zns", which walks up the domain tree until it
4731 finds some nameserver records. It should be used with care.
4733 (2) There is a new type, "mxh", which is like "mx" except that it returns
4734 just the host names, not the priorities.
4736 (3) It is now possible to give a list of domains (or IP addresses) to be
4737 looked up. The behaviour when one of the lookups defers can be
4738 controlled by a keyword.
4740 (4) It is now possible to specify the separator character for use when
4741 multiple records are returned.
4743 38. The dnslists ACL condition has been extended: it is now possible to supply
4744 a list of IP addresses and/or domains to be looked up in a particular DNS
4747 39. Added log_selector=+queue_time_overall.
4749 40. When running the queue in the test harness, wait just a tad after forking a
4750 delivery process, to get repeatability of debugging output.
4752 41. Include certificate and key file names in error message when GnuTLS fails
4753 to set them up, because the GnuTLS error message doesn't include the name
4754 of the failing file when there is a problem reading it.
4756 42. Allow both -bf and -bF in the same test run.
4758 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
4760 44. The "Exiscan patch" is now merged into the mainline Exim source.
4762 45. Sometimes the final signoff response after QUIT could fail to get
4763 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4764 < 0 before doing a fflush(). This bug looks as though it goes back to the
4765 introduction of TLS in release 3.20, but "sometimes" must have been rare
4766 because the tests only now provoked it.
4768 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
4769 (this can affect the format of dates).
4771 47. exim_tidydb, when checking for the continued existence of a message for
4772 which it has found a message-specific retry record, was not finding
4773 messages that were in split spool directories. Consequently, it was
4774 deleting retry records that should have stayed in existence.
4776 48. Steve fixed some bugs in eximstats.
4778 49. The SPA authentication driver was not abandoning authentication and moving
4779 on to the next authenticator when an expansion was forced to fail,
4780 contradicting the general specification for all authenticators. Instead it
4781 was generating a temporary error. It now behaves as specified.
4783 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
4784 (the order specifies the preference for clients). The order is now AES256,
4785 AES128, 3DES, ARCFOUR128.
4787 51. Small patch to Sieve code - explicitly set From: when generating an
4790 52. Exim crashed if a remote delivery caused a very long error message to be
4791 recorded - for instance if somebody sent an entire SpamAssassin report back
4792 as a large number of 550 error lines. This bug was coincidentally fixed by
4793 increasing the size of one of Exim's internal buffers (big_buffer) that
4794 happened as part of the Exiscan merge. However, to be on the safe side, I
4795 have made the code more robust (and fixed the comments that describe what
4798 53. Now that there can be additional text after "Completed" in log lines (if
4799 the queue_time_overall log selector is set), a one-byte patch to exigrep
4800 was needed to allow it to recognize "Completed" as not the last thing in
4803 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
4804 patch that reportedly fixes this has been added. I am not expert enough to
4805 create a test for it. This is what the patch creator wrote:
4807 "I found a little strange behaviour of ldap code when working with
4808 Windows 2003 AD Domain, where users was placed in more than one
4809 Organization Units. When I tried to give exim partial DN, the exit code
4810 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
4811 But simultaneously result of request was absolutely normal ldap result,
4812 so I produce this patch..."
4814 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
4815 REFERENCE, so I have modified the code to exclude the patch when that macro
4818 55. Some experimental protocols are using DNS PTR records for new purposes. The
4819 keys for these records are domain names, not reversed IP addresses. The
4820 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4821 leaves it alone. Component reversal etc. now happens only for IP addresses.
4824 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
4826 57. Double the size of the debug message buffer (to 2048) so that more of very
4827 long debug lines gets shown.
4829 58. The exicyclog utility now does better if the number of log files to keep
4830 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
4832 59. Two changes related to the smtp_active_hostname option:
4834 (1) $smtp_active_hostname is now available as a variable.
4835 (2) The default for smtp_banner uses $smtp_active_hostname instead
4836 of $primary_hostname.
4838 60. The host_aton() function is supposed to be passed a string that is known
4839 to be a valid IP address. However, in the case of IPv6 addresses, it was
4840 not checking this. This is a hostage to fortune. Exim now panics and dies
4841 if the condition is not met. A case was found where this could be provoked
4842 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4843 components; fortuitously, this particular loophole had already been fixed
4844 by change 4.50/55 above.
4846 If there are any other similar loopholes, the new check in host_aton()
4847 itself should stop them being exploited. The report I received stated that
4848 data on the command line could provoke the exploit when Exim was running as
4849 exim, but did not say which command line option was involved. All I could
4850 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4851 running as the user.
4854 61. There was a buffer overflow vulnerability in the SPA authentication code
4855 (which came originally from the Samba project). I have added a test to the
4856 spa_base64_to_bits() function which I hope fixes it.
4859 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
4860 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
4862 63. The daemon start-up calls getloadavg() while still root for those OS that
4863 need the first call to be done as root, but it missed one case: when
4864 deliver_queue_load_max is set with deliver_drop_privilege. This is
4865 necessary for the benefit of the queue runner, because there is no re-exec
4866 when deliver_drop_privilege is set.
4868 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
4869 This has been fixed.
4871 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4872 was in use, was not putting the data itself into the right store pool;
4873 consequently, it could be overwritten for a subsequent message in the same
4874 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4877 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
4879 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
4880 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
4881 the function were treating the return as a boolean value, which happened to
4882 work because 0=false and not-0=true, but is not correct code.
4884 68. The host_aton() function was not handling scoped IPv6 addresses (those
4885 with, for example, "%eth0" on the end) correctly.
4887 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
4888 negated items (that is, ~something) in unsigned ints. Some compilers
4889 apparently mutter when there is no cast.
4891 70. If an address verification called from an ACL failed, and did not produce a
4892 user-specific message (i.e. there was only a "system" message), nothing was
4893 put in $acl_verify_message. In this situation, it now puts the system
4896 71. Change 4.23/11 added synchronization checking at the start of an SMTP
4897 session; change 4.31/43 added the unwanted input to the log line - except
4898 that it did not do this in the start of session case. It now does.
4900 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
4901 This is wrong and can cause the other end to generate a synchronization
4902 error if it is another Exim or anything else that does the synchronization
4903 check. A QUIT command is no longer sent after a timeout.
4905 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
4906 during host lookups.
4908 74. The defer_ok option of callout verification was not working if it was used
4909 when verifying addresses in header lines, that is, for this case:
4911 verify = header_sender/callout=defer_ok
4913 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
4914 those file descriptors could be used for SMTP connections. If anything
4915 wrote to stderr (the example that came up was "warn" in embedded Perl), it
4916 could be sent to the SMTP client, causing chaos. The daemon now opens
4917 stdin, stdout, and stderr to /dev/null when it puts itself into the
4920 76. Arrange for output from Perl's "warn" command to be written to Exim's main
4921 log by default. The user can override this with suitable Perl magic.
4923 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
4924 the log message when discard triggers, was not working for the DATA ACL or
4925 for the non-SMTP ACL.
4927 78. Error message wording change in sieve.c.
4929 79. If smtp_accept_max_per_host was set, the number of connections could be
4930 restricted to fewer than expected, because the daemon was trying to set up
4931 a new connection before checking whether the processes handling previous
4932 connections had finished. The check for completed processes is now done
4933 earlier. On busy systems, this bug wouldn't be noticed because something
4934 else would have woken the daemon, and it would have reaped the completed
4937 80. If a message was submitted locally by a user whose login name contained one
4938 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
4939 It caused a spool format error. I have fixed the spool reading code. A
4940 related problem was that the "from" clause in the Received: line became
4941 illegal because of the space(s). It is now covered by ${quote_local_part.
4943 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
4946 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
4948 83. Patch from Sieve maintainer to fix unterminated string problem in
4949 "vacation" handling.
4951 84. Some minor changes to the Linux configuration files to help with other
4952 OS variants using glibc.
4954 85. One more patch for Sieve to update vacation handling to latest spec.
4957 ----------------------------------------------------
4958 See the note above about the 4.44 and 4.50 releases.
4959 ----------------------------------------------------
4965 1. Change 4.43/35 introduced a bug that caused file counts to be
4966 incorrectly computed when quota_filecount was set in an appendfile
4969 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
4970 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
4973 3. Give more explanation in the error message when the command for a transport
4974 filter fails to execute.
4976 4. There are several places where Exim runs a non-Exim command in a
4977 subprocess. The SIGUSR1 signal should be disabled for these processes. This
4978 was being done only for the command run by the queryprogram router. It is
4979 now done for all such subprocesses. The other cases are: ${run, transport
4980 filters, and the commands run by the lmtp and pipe transports.
4982 5. Some older OS have a limit of 256 on the maximum number of file
4983 descriptors. Exim was using setrlimit() to set 1000 as a large value
4984 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
4985 systems. I've change it so that if it can't get 1000, it tries for 256.
4987 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
4988 was an oversight, and furthermore, ever since the addition of extra
4989 controls (e.g. 4.43/32), the checks on when to allow different forms of
4990 "control" were broken. There should now be diagnostics for all cases when a
4991 control that does not make sense is encountered.
4993 7. $recipients is now available in the predata ACL (oversight).
4995 8. Tidy the search cache before the fork to do a delivery from a message
4996 received from the command line. Otherwise the child will trigger a lookup
4997 failure and thereby defer the delivery if it tries to use (for example) a
4998 cached ldap connection that the parent has called unbind on.
5000 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5001 of $address_data from the recipient verification was clobbered by the
5002 sender verification.
5004 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5005 was its contents. (It was OK if the option was not defined at all.)
5007 11. A "Completed" log line is now written for messages that are removed from
5008 the spool by the -Mrm option.
5010 12. $host_address is now set to the target address during the checking of
5011 ignore_target_hosts.
5013 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5014 being passed; this would have caused $sender_host_name to have been used if
5015 matching the list had actually called for a host name (not very likely,
5016 since this list is usually IP addresses). A host name is now passed as
5019 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5020 code that specifies a non-restarting handler (typically sigaction() in
5021 modern systems) in an attempt to fix a rare and obscure crash bug.
5023 15. Narrowed the window for a race in the daemon that could cause it to ignore
5024 SIGCHLD signals. This is not a major problem, because they are used only to
5025 wake it up if nothing else does.
5027 16. A malformed maildirsize file could cause Exim to calculate negative values
5028 for the mailbox size or file count. Odd effects could occur as a result.
5029 The maildirsize information is now recalculated if the size or filecount
5032 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5033 support for a long time. Removed HAVE_SYS_VFS_H.
5035 18. Updated exipick to current release from John Jetmore.
5037 19. Allow an empty sender to be matched against a lookup in an address list.
5038 Previously the only cases considered were a regular expression, or an
5041 20. Exim went into a mad DNS lookup loop when doing a callout where the
5042 host was specified on the transport, if the DNS lookup yielded more than
5045 21. The RFC2047 encoding function was originally intended for short strings
5046 such as real names; it was not keeping to the 75-character limit for
5047 encoded words that the RFC imposes. It now respects the limit, and
5048 generates multiple encoded words if necessary. To be on the safe side, I
5049 have increased the buffer size for the ${rfc2047: expansion operator from
5052 22. Failure to deliver a bounce message always caused it to be frozen, even if
5053 there was an errors_to setting on the router. The errors_to setting is now
5056 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5057 canonical form (fully expanded) before being placed in
5058 $sender_host_address.
5060 24. Updated eximstats to version 1.33
5062 25. Include certificate and key file names in error message when GnuTLS fails
5063 to set them up, because the GnuTLS error message doesn't include the name
5064 of the failing file when there is a problem reading it.
5066 26. Expand error message when OpenSSL has problems setting up cert/key files.
5069 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5070 (this can affect the format of dates).
5072 28. exim_tidydb, when checking for the continued existence of a message for
5073 which it has found a message-specific retry record, was not finding
5074 messages that were in split spool directories. Consequently, it was
5075 deleting retry records that should have stayed in existence.
5077 29. eximstats updated to version 1.35
5078 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5079 1.35 - bugfix such that pie charts by volume are generated correctly
5081 30. The SPA authentication driver was not abandoning authentication and moving
5082 on to the next authenticator when an expansion was forced to fail,
5083 contradicting the general specification for all authenticators. Instead it
5084 was generating a temporary error. It now behaves as specified.
5086 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5087 (the order specifies the preference for clients). The order is now AES256,
5088 AES128, 3DES, ARCFOUR128.
5090 31. Small patch to Sieve code - explicitly set From: when generating an
5093 32. Exim crashed if a remote delivery caused a very long error message to be
5094 recorded - for instance if somebody sent an entire SpamAssassin report back
5095 as a large number of 550 error lines. This bug was coincidentally fixed by
5096 increasing the size of one of Exim's internal buffers (big_buffer) that
5097 happened as part of the Exiscan merge. However, to be on the safe side, I
5098 have made the code more robust (and fixed the comments that describe what
5101 33. Some experimental protocols are using DNS PTR records for new purposes. The
5102 keys for these records are domain names, not reversed IP addresses. The
5103 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5104 leaves it alone. Component reversal etc. now happens only for IP addresses.
5107 34. The host_aton() function is supposed to be passed a string that is known
5108 to be a valid IP address. However, in the case of IPv6 addresses, it was
5109 not checking this. This is a hostage to fortune. Exim now panics and dies
5110 if the condition is not met. A case was found where this could be provoked
5111 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5112 components; fortuitously, this particular loophole had already been fixed
5113 by change 4.50/55 or 4.44/33 above.
5115 If there are any other similar loopholes, the new check in host_aton()
5116 itself should stop them being exploited. The report I received stated that
5117 data on the command line could provoke the exploit when Exim was running as
5118 exim, but did not say which command line option was involved. All I could
5119 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5120 running as the user.
5123 35. There was a buffer overflow vulnerability in the SPA authentication code
5124 (which came originally from the Samba project). I have added a test to the
5125 spa_base64_to_bits() function which I hope fixes it.
5128 36. The daemon start-up calls getloadavg() while still root for those OS that
5129 need the first call to be done as root, but it missed one case: when
5130 deliver_queue_load_max is set with deliver_drop_privilege. This is
5131 necessary for the benefit of the queue runner, because there is no re-exec
5132 when deliver_drop_privilege is set.
5134 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5135 was in use, was not putting the data itself into the right store pool;
5136 consequently, it could be overwritten for a subsequent message in the same
5137 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5140 38. Sometimes the final signoff response after QUIT could fail to get
5141 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5142 < 0 before doing a fflush(). This bug looks as though it goes back to the
5143 introduction of TLS in release 3.20, but "sometimes" must have been rare
5144 because the tests only now provoked it.
5150 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5151 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5152 Now it returns an integer. A number of calls were still expecting a T/F
5153 return. Fortuitously, in all cases, the tests worked in OK situations,
5154 which is the norm. However, things would have gone wrong on any write
5155 failures on the smtp file descriptor. This function is used when sending
5156 messages over SMTP and also when doing verify callouts.
5158 2. When Exim is called to do synchronous delivery of a locally submitted
5159 message (the -odf or -odi options), it no longer closes stderr before doing
5162 3. Implemented the mua_wrapper option.
5164 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5166 5. Implemented the functions header_remove(), header_testname(),
5167 header_add_at_position(), and receive_remove_recipient(), and exported them
5170 6. If an ACL "warn" statement specified the addition of headers, Exim already
5171 inserted X-ACL-Warn: at the start if there was no header name. However, it
5172 was not making this test for the second and subsequent header lines if
5173 there were newlines in the string. This meant that an invalid header could
5174 be inserted if Exim was badly configured.
5176 7. Allow an ACL "warn" statement to add header lines at the start or after all
5177 the Received: headers, as well as at the end.
5179 8. Added the rcpt_4xx retry error code.
5181 9. Added postmaster_mailfrom=xxx to callout verification option.
5183 10. Added mailfrom=xxxx to the callout verification option, for verify=
5186 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5187 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5189 12. Inserted some casts to stop certain compilers warning when using pointer
5190 differences as field lengths or precisions in printf-type calls (mostly
5191 affecting debugging statements).
5193 13. Added optional readline() support for -be (dynamically loaded).
5195 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5196 same clock tick as a message's arrival, so that its received time was the
5197 same as the "first fail" time on the retry record, and that message
5198 remained on the queue past the ultimate address timeout, every queue runner
5199 would try a delivery (because it was past the ultimate address timeout) but
5200 after another failure, the ultimate address timeout, which should have then
5201 bounced the address, did not kick in. This was a "< instead of <=" error;
5202 in most cases the first failure would have been in the next clock tick
5203 after the received time, and all would be well.
5205 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5206 being recognized when the domain list was tested by the match_domain
5207 condition in an expansion string.
5209 16. Added the ${str2b64: operator.
5211 17. Exim was always calling setrlimit() to set a large limit for the number of
5212 processes, without checking whether the existing limit was already
5213 adequate. (It did check for the limit on file descriptors.) Furthermore,
5214 errors from getrlimit() and setrlimit() were being ignored. Now they are
5215 logged to the main and panic logs, but Exim does carry on, to try to do its
5216 job under whatever limits there are.
5218 18. Imported PCRE 5.0.
5220 19. Trivial typo in log message " temporarily refused connection" (the leading
5223 20. If the log selector return_path_on_delivery was set and an address was
5224 redirected to /dev/null, the delivery process crashed because it assumed
5225 that a return path would always be set for a "successful" delivery. In this
5226 case, the whole delivery is bypassed as an optimization, and therefore no
5229 21. Internal re-arrangement: the function for sending a challenge and reading
5230 a response while authentication was assuming a zero-terminated challenge
5231 string. It's now changed to take a pointer and a length, to allow for
5232 binary data in such strings.
5234 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5236 23. Exim was not respecting finduser_retries when seeking the login of the
5237 uid under which it was called; it was always trying 10 times. (The default
5238 setting of finduser_retries is zero.) Also, it was sleeping after the final
5239 failure, which is pointless.
5241 24. Implemented tls_on_connect_ports.
5243 25. Implemented acl_smtp_predata.
5245 26. If the domain in control=submission is set empty, Exim assumes that the
5246 authenticated id is a complete email address when it generates From: or
5247 Sender: header lines.
5249 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5250 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5251 chown and chgrp in /bin and hostname in /usr/bin.
5253 28. Exim was keeping the "process log" file open after each use, just as it
5254 does for the main log. This opens the possibility of it remaining open for
5255 long periods when the USR1 signal hits a daemon. Occasional processlog
5256 errors were reported, that could have been caused by this. Anyway, it seems
5257 much more sensible not to leave this file open at all, so that is what now
5260 29. The long-running daemon process does not normally write to the log once it
5261 has entered its main loop, and it closes the log before doing so. This is
5262 so that log files can straightforwardly be renamed and moved. However,
5263 there are a couple of unusual error situations where the daemon does write
5264 log entries, and I had neglected to close the log afterwards.
5266 30. The text of an SMTP error response that was received during a remote
5267 delivery was being truncated at 512 bytes. This is too short for some of
5268 the long messages that one sometimes sees. I've increased the limit to
5271 31. It is now possible to make retry rules that apply only when a message has a
5272 specific sender, in particular, an empty sender.
5274 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5275 it possible to be selective about when SMTP synchronization is enforced.
5277 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5279 32. Implemented hosts_connection_nolog.
5281 33. Added an ACL for QUIT.
5283 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5286 35. Added mailbox_size and mailbox_filecount to appendfile.
5288 36. Added control = no_multiline_responses to ACLs.
5290 37. There was a bug in the logic of the code that waits for the clock to tick
5291 in the case where the clock went backwards by a substantial amount such
5292 that the microsecond fraction of "now" was more than the microsecond
5293 fraction of "then" (but the whole seconds number was less).
5295 38. Added support for the libradius Radius client library this is found on
5296 FreeBSD (previously only the radiusclient library was supported).
5302 1. When certain lookups returned multiple values in the form name=value, the
5303 quoting of the values was not always being done properly. Specifically:
5304 (a) If the value started with a double quote, but contained no whitespace,
5306 (b) If the value contained whitespace other than a space character (i.e.
5307 tabs or newlines or carriage returns) it was not quoted.
5308 This fix has been applied to the mysql and pgsql lookups by writing a
5309 separate quoting function and calling it from the lookup code. The fix
5310 should probably also be applied to nisplus, ibase and oracle lookups, but
5311 since I cannot test any of those, I have not disturbed their existing code.
5313 2. A hit in the callout cache for a specific address caused a log line with no
5314 reason for rejecting RCPT. Now it says "Previous (cached) callout
5315 verification failure".
5317 3. There was an off-by-one bug in the queryprogram router. An over-long
5318 return line was truncated at 256 instead of 255 characters, thereby
5319 overflowing its buffer with the terminating zero. As well as fixing this, I
5320 have increased the buffer size to 1024 (and made a note to document this).
5322 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5323 when Exim is waiting for an SMTP response from a remote server, Exim
5324 restarts its select() call on the socket, thereby resetting its timeout.
5325 This is not a problem when such interrupts are rare. Somebody set up a cron
5326 job to run exiwhat every 2 minutes, which is less than the normal select()
5327 timeout (5 or 10 minutes). This meant that the select() timeout never
5328 kicked in because it was always reset. I have fixed this by comparing the
5329 time when an interrupt arrives with the time at the start of the first call
5330 to select(). If more time than the timeout has elapsed, the interrupt is
5331 treated as a timeout.
5333 5. Some internal re-factoring in preparation for the addition of Sieve
5334 extensions (by MH). In particular, the "personal" test is moved to a
5335 separate function, and given an option for scanning Cc: and Bcc: (which is
5336 not set for Exim filters).
5338 6. When Exim created an email address using the login of the caller as the
5339 local part (e.g. when creating a From: or Sender: header line), it was not
5340 quoting the local part when it contained special characters such as @.
5342 7. Installed new OpenBSD configuration files.
5344 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5345 try to make them clearer.
5347 9. Callout options, other than the timeout value, were being ignored when
5348 verifying sender addresses in header lines. For example, when using
5350 verify = header_sender/callout=no_cache
5352 the cache was (incorrectly) being used.
5354 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5355 only the Cygwin environment.
5357 11. When return_path_on_delivery was set as a log selector, if different remote
5358 addresses in the same message used different return paths and parallel
5359 remote delivery occurred, the wrong values would sometimes be logged.
5360 (Whenever a remote delivery process finished, the return path value from
5361 the most recently started remote delivery process was logged.)
5363 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5364 lines when AUTH and/or TLS are in use. This is the "received protocol"
5365 field. Exim used to use "asmtp" for authenticated SMTP, without any
5366 indication (in the protocol name) for TLS use. Now it follows the RFC and
5367 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5368 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5369 names appear in log lines as well as in Received: header lines.
5371 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5372 extensions, and comparison tests, and to fix some bugs.
5374 14. Changes to the "personal" filter test:
5376 (1) The test was buggy in that it was just doing the equivalent of
5377 "contains" tests on header lines. For example, if a user's address was
5378 anne@some.where, the "personal" test would incorrectly be true for
5380 To: susanne@some.where
5382 This test is now done by extracting each address from the header in turn,
5383 and checking the entire address. Other tests that are part of "personal"
5384 are now done using regular expressions (for example, to check local parts
5385 of addresses in From: header lines).
5387 (2) The list of non-personal local parts in From: addresses has been
5388 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5389 taken from the Sieve specification recommendations.
5391 (3) If the message contains any header line starting with "List-" it is
5392 treated as non-personal.
5394 (4) The test for "circular" in the Subject: header line has been removed
5395 because it now seems ill-conceived.
5397 15. Minor typos in src/EDITME comments corrected.
5399 16. Installed latest exipick from John Jetmore.
5401 17. If headers_add on a router specified a text string that was too long for
5402 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5403 of string_sprintf() is now avoided.
5405 18. $message_body_size was not set (it was always zero) when running the DATA
5406 ACL and the local_scan() function.
5408 19. For the "mail" command in an Exim filter, no default was being set for
5409 the once_repeat time, causing a random time value to be used if "once" was
5410 specified. (If the value happened to be <= 0, no repeat happened.) The
5411 default is now 0s, meaning "never repeat". The "vacation" command was OK
5412 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5413 (I found it when inspecting the code).
5415 20. There is now an overall timeout for performing a callout verification. It
5416 defaults to 4 times the callout timeout, which applies to individual SMTP
5417 commands during the callout. The overall timeout applies when there is more
5418 than one host that can be tried. The timeout is checked before trying the
5419 next host. This prevents very long delays if there are a large number of
5420 hosts and all are timing out (e.g. when the network connections are timing
5421 out). The value of the overall timeout can be changed by specifying an
5422 additional sub-option for "callout", called "maxwait". For example:
5424 verify = sender/callout=5s,maxwait=20s
5426 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5427 to the end before writing, but this should make it even safer).
5429 22. Exim was forgetting that it had advertised PIPELINING for the second and
5430 subsequent messages on an SMTP connection. It was also not resetting its
5431 memory on STARTTLS and an internal HELO.
5433 23. When Exim logs an SMTP synchronization error within a session, it now
5434 records whether PIPELINING has been advertised or not.
5436 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5437 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5438 rather than long int.
5440 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5442 26. Added the never_mail option to autoreply.
5448 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5449 crash if the getsockname() call failed; this can happen if a connection is
5450 closed very soon after it is established. The problem was simply in the
5451 order in which certain operations were done, causing Exim to try to write
5452 to the SMTP stream before it had set up the file descriptor. The bug has
5453 been fixed by making things happen in the correct order.
5459 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5460 before the connection was closed, thus losing the rejection response.
5462 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5463 some early Solaris releases, but causes trouble in current releases where
5464 socklen_t is defined.
5466 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5469 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5472 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5473 that releasing the top of it at the end releases what was used for sub-
5474 expansions (unless the block got too big). However, discard this block if
5475 the first thing is a variable or header, so that we can use its block when
5476 it is dynamic (useful for very large $message_headers, for example).
5478 6. Lookups now cache *every* query, not just the most recent. A new, separate
5479 store pool is used for this. It can be recovered when all lookup caches are
5480 flushed. Lookups now release memory at the end of their result strings.
5481 This has involved some general refactoring of the lookup sources.
5483 7. Some code has been added to the store_xxx() functions to reduce the amount
5484 of flapping under certain conditions.
5486 8. log_incoming_interface used to affect only the <= reception log lines. Now
5487 it causes the local interface and port to be added to several more SMTP log
5488 lines, for example "SMTP connection from", and rejection lines.
5490 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5492 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5494 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5495 could be overwritten at the end of the current message (or the start of a
5496 new message if it was set in a HELO ACL). The value is now preserved for
5497 the duration of the SMTP connection.
5499 12. If a transport had a headers_rewrite setting, and a matching header line
5500 contained an unqualified address, that address was qualified, even if it
5501 did not match any rewriting rules. The underlying bug was that the values
5502 of the flags that permit the existence of unqualified sender and recipient
5503 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5504 non-local messages, and by -bnq for local messages) were not being
5505 preserved with the message after it was received.
5507 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5508 "next input=" as part of the text comprising the host identity instead of
5509 the correct text. The code was using the same buffer for two different
5510 strings. However, depending on which order the printing function evaluated
5511 its arguments, the bug did not always show up. Under Linux, for example, my
5512 test suite worked just fine.
5514 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5515 doesn't work with some older versions of Perl. It has been changed to "my",
5516 which in any case is probably the better facility to use.
5518 15. A really picky compiler found some instances of statements for creating
5519 error messages that either had too many or two few arguments for the format
5522 16. The size of the buffer for calls to the DNS resolver has been increased
5523 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
5524 for addresses that have a lot of PTR records. This alleviates a problem; it
5525 does not fully solve it.
5527 17. A dnsdb lookup for PTR records that receives more data than will fit in the
5528 buffer now truncates the list and logs the incident, which is the same
5529 action as happens when Exim is looking up a host name and its aliases.
5530 Previously in this situation something unpredictable would happen;
5531 sometimes it was "internal error: store_reset failed".
5533 18. If a server dropped the connection unexpectedly when an Exim client was
5534 using GnuTLS and trying to read a response, the client delivery process
5535 crashed while trying to generate an error log message.
5537 19. If a "warn" verb in an ACL added multiple headers to a message in a single
5538 string, for example:
5540 warn message = H1: something\nH2: something
5542 the text was added as a single header line from Exim's point of view
5543 though it ended up OK in the delivered message. However, searching for the
5544 second and subsequent header lines using $h_h2: did not work. This has been
5545 fixed. Similarly, if a system filter added multiple headers in this way,
5546 the routers could not see them.
5548 20. Expanded the error message when iplsearch is called with an invalid key to
5549 suggest using net-iplsearch in a host list.
5551 21. When running tests using -bh, any delays imposed by "delay" modifiers in
5552 ACLs are no longer actually imposed (and a message to that effect is
5555 22. If a "gecos" field in a passwd entry contained escaped characters, in
5556 particular, if it contained a \" sequence, Exim got it wrong when building
5557 a From: or a Sender: header from that name. A second bug also caused
5558 incorrect handling when an unquoted " was present following a character
5559 that needed quoting.
5561 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
5562 was not being matched caselessly.
5564 24. Arranged for all hyphens in the exim.8 source to be escaped with
5567 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
5568 properly. Recipient callout cache records were still being keyed to include
5569 the sender, even when use_sender was set false. This led to far more
5570 callouts that were necessary. The sender is no longer included in the key
5571 when use_sender is false.
5573 26. Added "control = submission" modifier to ACLs.
5575 27. Added the ${base62d: operator to decode base 62 numbers.
5577 28. dnsdb lookups can now access SRV records.
5579 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
5580 the configuration file.
5582 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
5583 (-v) mode. This makes the output for a verbose queue run more intelligible.
5585 31. Added a use_postmaster feature to recipient callouts.
5587 32. Added the $body_zerocount variable, containing the number of binary zero
5588 bytes in the message body.
5590 33. The time of last modification of the "new" subdirectory is now used as the
5591 "mailbox time last read" when there is a quota error for a maildir
5594 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
5596 35. Added +ignore_unknown as a special item in host lists.
5598 36. Code for decoding IPv6 addresses in host lists is now included, even if
5599 IPv6 support is not being compiled. This fixes a bug in which an IPv6
5600 address was recognized as an IP address, but was then not correctly decoded
5601 into binary, causing unexpected and incorrect effects when compared with
5608 1. Very minor rewording of debugging text in manualroute to say "list of
5609 hosts" instead of "hostlist".
5611 2. If verify=header_syntax was set, and a header line with an unqualified
5612 address (no domain) and a large number of spaces between the end of the
5613 name and the colon was received, the reception process suffered a buffer
5614 overflow, and (when I tested it) crashed. This was caused by some obsolete
5615 code that should have been removed. The fix is to remove it!
5617 3. When running in the test harness, delay a bit after writing a bounce
5618 message to get a bit more predictability in the log output.
5620 4. Added a call to search_tidyup() just before forking a reception process. In
5621 theory, someone could use a lookup in the expansion of smtp_accept_max_
5622 per_host which, without the tidyup, could leave open a database connection.
5624 5. Added the variables $recipient_data and $sender_data which get set from a
5625 lookup success in an ACL "recipients" or "senders" condition, or a router
5626 "senders" option, similar to $domain_data and $local_part_data.
5628 6. Moved the writing of debug_print from before to after the "senders" test
5631 7. Change 4.31/66 (moving the time when the Received: is generated) caused
5632 problems for message scanning, either using a data ACL, or using
5633 local_scan() because the Received: header was not generated till after they
5634 were called (in order to set the time as the time of reception completion).
5635 I have revised the way this works. The header is now generated after the
5636 body is received, but before the ACL or local_scan() are called. After they
5637 are run, the timestamp in the header is updated.
5643 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
5644 before starting a queue runner without re-exec. This happened only when
5645 deliver_drop_privilege was set or when the Exim user was set to root. The
5646 effect of the bug was that timeouts during subsequent deliveries caused
5647 crashes instead of being properly handled. The handler is now left at its
5648 default (and expected) setting.
5650 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
5651 message, again when deliver_drop_privilege is set or Exim is run as root.
5652 The bug described in (1) was not present in this case, but the tidying up
5653 of the other signals was missing. I have made the two cases consistent.
5655 3. The ignore_target_hosts setting on a manualroute router was being ignored
5656 for hosts that were looked up using the /MX notation.
5658 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
5661 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
5662 operated on the sender address. After changing the $sender_address to <>
5663 for the sender address verify, Exim was re-instated it as the original
5664 (before rewriting) address, but remembering that it had rewritten it, so it
5665 wasn't rewriting it again. This bug also had the effect of breaking the
5666 sender address verification caching when the sender address was rewritten.
5668 6. The ignore_target_hosts option was being ignored by the ipliteral router.
5669 This has been changed so that if the ip literal address matches
5670 ignore_target_hosts, the router declines.
5672 7. Added expansion conditions match_domain, match_address, and match_local_
5673 part (NOT match_host).
5675 8. The placeholder for the Received: header didn't have a length field set.
5677 9. Added code to Exim itself and to exim_lock to test for a specific race
5678 condition that could lead to file corruption when using MBX delivery. The
5679 issue is with the lockfile that is created in /tmp. If this file is removed
5680 after a process has opened it but before that process has acquired a lock,
5681 there is the potential for a second process to recreate the file and also
5682 acquire a lock. This could lead to two Exim processes writing to the file
5683 at the same time. The added code performs the same test as UW imapd; it
5684 checks after acquiring the lock that its file descriptor still refers to
5685 the same named file.
5687 10. The buffer for building added header lines was of fixed size, 8192 bytes.
5688 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
5691 11. Added the smtp_active_hostname option. If used, this will typically be made
5692 to depend on the incoming interface address. Because $interface_address is
5693 not set up until the daemon has forked a reception process, error responses
5694 that can happen earlier (such as "too many connections") no longer contain
5697 12. If an expansion in a condition on a "warn" statement fails because a lookup
5698 defers, the "warn" statement is abandoned, and the next ACL statement is
5699 processed. Previously this caused the whole ACL to be aborted.
5701 13. Added the iplsearch lookup type.
5703 14. Added ident_timeout as a log selector.
5705 15. Added tls_certificate_verified as a log selector.
5707 16. Added a global option tls_require_ciphers (compare the smtp transport
5708 option of the same name). This controls incoming TLS connections.
5710 17. I finally figured out how to make tls_require_ciphers do a similar thing
5711 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
5712 before starting the TLS session.
5714 18. Tabs are now shown as \t in -bP output.
5716 19. If the log selector return_path_on_delivery was set, Exim crashed when
5717 bouncing a message because it had too many Received: header lines.
5719 20. If two routers both had headers_remove settings, and the first one included
5720 a superfluous trailing colon, the final name in the first list and the
5721 first name in the second list were incorrectly joined into one item (with a
5722 colon in the middle).
5728 1. Added -C and -D options to the exinext utility, mainly to make it easier
5729 to include in the automated testing, but these could be helpful when
5730 multiple configurations are in use.
5732 2. The exinext utility was not formatting the output nicely when there was
5733 an alternate port involved in the retry record key, nor when there was a
5734 message id as well (for retries that were specific to a specific message
5735 and a specific host). It was also confused by IPv6 addresses, because of
5736 the additional colons they contain. I have fixed the IPv4 problem, and
5737 patched it up to do a reasonable job for IPv6.
5739 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
5740 delivery, the log line now contains "pipelined" if PIPELINING was used.
5742 4. An SMTP transport process used to panic and die if the bind() call to set
5743 an explicit outgoing interface failed. This has been changed; it is now
5744 treated in the same way as a connect() failure.
5746 5. A reference to $sender_host_name in the part of a conditional expansion
5747 that was being skipped was still causing a DNS lookup. This no longer
5750 6. The def: expansion condition was not recognizing references to header lines
5751 that used bh_ and bheader_.
5753 7. Added the _cache feature to named lists.
5755 8. The code for checking quota_filecount in the appendfile transport was
5756 allowing one more file than it should have been.
5758 9. For compatibility with Sendmail, the command line option
5766 and sets the incoming protocol and host name (for trusted callers). The
5767 host name and its colon can be omitted when only the protocol is to be set.
5768 Note the Exim already has two private options, -pd and -ps, that refer to
5769 embedded Perl. It is therefore impossible to set a protocol value of "d" or
5770 "s", but I don't think that's a major issue.
5772 10. A number of refactoring changes to the code, none of which should affect
5775 (a) The number of logging options was getting close to filling up the
5776 32-bit word that was used as a bit map. I have split them into two classes:
5777 those that are passed in the argument to log_write(), and those that are
5778 only ever tested independently outside of that function. These are now in
5779 separate 32-bit words, so there is plenty of room for expansion again.
5780 There is no change in the user interface or the logging behaviour.
5782 (b) When building, for example, log lines, the code previously used a
5783 macro that called string_cat() twice, in order to add two strings. This is
5784 not really sufficiently general. Furthermore, there was one instance where
5785 it was actually wrong because one of the argument was used twice, and in
5786 one call a function was used. (As it happened, calling the function twice
5787 did not affect the overall behaviour.) The macro has been replaced by a
5788 function that can join an arbitrary number of extra strings onto a growing
5791 (c) The code for expansion conditions now uses a table and a binary chop
5792 instead of a serial search (which was left over from when there were very
5793 few conditions). Also, it now recognizes conditions like "pam" even when
5794 the relevant support is not compiled in: a suitably worded error message is
5795 given if an attempt is made to use such a condition.
5797 11. Added ${time_interval:xxxxx}.
5799 12. A bug was causing one of the ddress fields not to be passed back correctly
5800 from remote delivery subprocesses. The field in question was not being
5801 subsequently used, so this caused to problems in practice.
5803 13. Added new log selectors queue_time and deliver_time.
5805 14. Might have fixed a bug in maildirsizefile handling that threw up
5806 "unexpected character" debug warnings, and recalculated the data
5807 unnecessarily. In any case, I expanded the warning message to give more
5810 15. Added the message "Restricted characters in address" to the statements in
5811 the default ACL that block characters like @ and % in local parts.
5813 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
5814 Three changes have been made:
5816 (a) There was a serious bug; a negative response to MAIL caused the whole
5817 recipient domain to be cached as invalid, thereby blocking all messages
5818 to all local parts at the same domain, from all senders. This bug has
5819 been fixed. The domain is no longer cached after a negative response to
5820 MAIL if the sender used is not empty.
5822 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
5825 (c) A new callout option, "use_sender" has been added for people who want
5826 the modified behaviour.
5832 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
5835 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
5836 indeed breaks things for older releases.
5838 3. Added additional logging to the case where there is a problem reading data
5839 from a filter that is running in a subprocess using a pipe, in order to
5840 try to track down a specific problem.
5842 4. Testing facility fudge: when running in the test harness and attempting
5843 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
5844 getting "No route to host". Convert this to a timeout.
5846 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
5849 6. Some OS don't have socklen_t but use size_t instead. This affects the
5850 fifth argument of getsockopt() amongst other things. This is now
5851 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
5852 can be set for individual OS. I have set it for SunOS5, OSF1, and
5853 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
5854 some earlier ones do not.
5856 7. Change 4.30/15 was not doing the test caselessly.
5858 8. The standard form for an IPv6 address literal was being rejected by address
5859 parsing in, for example, MAIL and RCPT commands. An example of this kind of
5860 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5861 this, as well as the form without the "IPv6" on the front (but only when
5862 address literals are enabled, of course).
5864 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
5866 10. Exim crashed if a message with an empty sender address specified by -f
5867 encountered a router with an errors_to setting. This could be provoked only
5868 by a command such as
5872 where an empty string was supplied; "<>" did not hit this bug.
5874 11. Installed PCRE release 4.5.
5876 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
5877 remained set. It is now erased.
5879 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
5880 times from message ids (which are base 36 rather than the normal 62).
5882 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
5883 were being counted as actual protocol errors, and logged if the log
5884 selector +smtp_protocol_error was set. One cannot be perfect in this test,
5885 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
5886 and DATA following a set of rejected RCPTs do not count as protocol errors.
5887 In other words, Exim assumes they were pipelined, though this may not
5888 actually be the case. Of course, in all cases the client gets an
5889 appropriate error code.
5891 15. If a lookup fails in an ACL condition, a message about the failure may
5892 be available; it is used if testing the ACL cannot continue, because most
5893 such messages specify what the cause of the deferral is. However, some
5894 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
5895 that caused an old message to be retained and used if a later statement
5896 caused a defer, replacing the real cause of the deferral.
5898 16. If an IP address had so many PTR records that the DNS lookup buffer
5899 was not large enough to hold them, Exim could crash while trying to process
5900 the truncated data. It now detects and logs this case.
5902 17. Further to 4.21/58, another change has been made: if (and only if) the
5903 first line of a message (the first header line) ends with CRLF, a bare LF
5904 in a subsequent header line has a space inserted after it, so as not to
5905 terminate the header.
5907 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
5908 unnecessarily, used atoi() instead of strtol(), and didn't check the
5909 termination when getting file sizes from file names by regex.
5911 19. Completely re-implemented the support for maildirsize files, in the light
5912 of a number of problems with the previous contributed implementation
5913 (4.30/29). In particular:
5915 . If the quota is zero, the maildirsize file is maintained, but no quota is
5918 . If the maildir directory does not exist, it is created before any attempt
5919 to write a maildirsize file.
5921 . The quota value in the file is just a cache; if the quota is changed in
5922 the transport, the new value overrides.
5924 . A regular expression is available for excluding directories from the
5927 20. The autoreply transport checks the characters in options that define the
5928 message's headers; it allows continued headers, but it was checking with
5929 isspace() after an embedded newline instead of explicitly looking for a
5932 21. If all the "regular" hosts to which an address was routed had passed their
5933 expiry times, and had not reached their retry times, the address was
5934 bounced, even if fallback hosts were defined. Now Exim should go on to try
5937 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
5938 equivalent code in the SMTP transport. Some hosts send humungous responses
5939 to HELO/EHLO, more than 1024 it seems.
5941 23. Refactoring: code in filter.c used (void *) for "any old type" but this
5942 gives compiler warnings in some environments. I've now done it "properly",
5945 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
5946 (because of problems with the built-in one) was declared to return uschar *
5947 instead of char *, causing compiler failure.
5949 25. Fixed a file descriptor leak when processing alias/forward files.
5951 26. Fixed a minor format string issue in dbfn.c.
5953 27. Typo in exim.c: ("dmbnz" for "dbmnz").
5955 28. If a filter file refered to $h_xxx or $message_headers, and the headers
5956 contained RFC 2047 "words", Exim's memory could, under certain conditions,
5959 29. When a sender address is verified, it is cached, to save repeating the test
5960 when there is more than one recipient in a message. However, when the
5961 verification involves a callout, it is possible for different callout
5962 options to be set for different recipients. It is too complicated to keep
5963 track of this in the cache, so now Exim always runs a verification when a
5964 callout is required, relying on the callout cache for the optimization.
5965 The overhead is duplication of the address routing, but this should not be
5968 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
5969 to be verified with callout=postmaster, and the main callout worked but the
5970 postmaster check failed, the verification correctly failed. However, if a
5971 subsequent RCPT command asked for sender verification *without* the
5972 postmaster check, incorrect caching caused this verification also to fail,
5975 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
5976 it was not caching the DNS options (qualify_single, search_parents) that
5977 were used when the lookup failed. A subsequent lookup with different
5978 options therefore always gave the same answer, though there were cases
5979 where it should not have. (Example: a "domains = !$mx_any" option on a
5980 dnslookup router: the "domains" option is always processed without any
5981 widening, but the router might have qualify_single set.) Now Exim uses the
5982 cached value only when the same options are set.
5984 32. Added John Jetmore's "exipick" utility to the distribution.
5986 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
5987 than a timeout (e.g. a certificate is required, and is not provided), an
5988 Exim server now closes the connection immediately. Previously it waited for
5989 the client to close - but if the client is SSL, it seems that they each
5990 wait for each other, leading to a delay before one of them times out.
5992 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
5993 maintained 0.8.x compatibility because I don't think many are using it, and
5994 it is clearly obsolete.
5996 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
5999 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6000 client certificate was expired. A simple patch fixes this, though I don't
6001 understand the full logic of why the verify callback is called multiple
6004 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6005 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6006 which causes problems with some clients (such as the Certicom SSL Plus
6007 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6008 disables the coutermeasure allowing Eudora to connect."
6010 38. Exim was not checking that a write() to a log file succeeded. This could
6011 lead to Bad Things if a log got too big, in particular if it hit a file
6012 size limit. Exim now panics and dies if it cannot write to a log file, just
6013 as it does if it cannot open a log file.
6015 39. Modified OS/Makefile-Linux so that it now contains
6017 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6019 The two -D definitions ensure that Exim is compiled with large file
6020 support, which makes it possible to handle log files that are bigger than
6023 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6024 instance) a domain was checked against a named list that involved a lookup,
6025 causing $domain_data to be set, then another domain was checked against the
6026 same list, then the first domain was re-checked, the value of $domain_data
6027 after the final check could be wrong. In particular, if the second check
6028 failed, it could be set empty. This bug probably also applied to
6031 41. The strip_trailing_dot option was not being applied to the address given
6032 with the -f command-line option.
6034 42. The code for reading a message's header from the spool was incrementing
6035 $received_count, but never initializing it. This meant that the value was
6036 incorrect (doubled) while delivering a message in the same process in which
6037 it was received. In the most common configuration of Exim, this never
6038 happens - a fresh exec is done - but it can happen when
6039 deliver_drop_privilege is set.
6041 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6042 it now includes up to 150 characters of the unexpected data in the log
6045 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6046 and building data strings. The size of both of these buffers was 10 000
6047 bytes - far larger than anybody would *ever* want, thought I. Needless to
6048 say, somebody hit the limit. I have increased the maximum line length to
6049 20 000 and the maximum data length of concatenated lines to 100 000. I have
6050 also fixed two bugs, because there was no checking on these buffers. Tsk,
6051 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6052 buffer is too small.
6054 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6055 lsearch lookups. Now it does.
6057 46. When parsing a route_list item in a manualroute router, a fixed-length
6058 buffer was used for the list of hosts. I made this 1024 bytes long,
6059 thinking that nobody would ever have a list of hosts that long. Wrong.
6060 Somebody had a whole pile of complicated expansion conditions, and the
6061 string was silently truncated, leading to an expansion error. It turns out
6062 that it is easier to change to an unlimited length (owing to other changes
6063 that have happened since this code was originally written) than to build
6064 structure for giving a limitation error. The length of the item that
6065 expands into the list of hosts is now unlimited.
6067 47. The lsearch lookup could not handle data where the length of text line was
6068 more than 4095 characters. Such lines were truncated, leading to shortened
6069 data being returned. It should now handle lines of any length.
6071 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6072 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6075 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6076 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6077 no longer happens in comment lines. A list of replacements is now placed
6078 at the head of all of the source files, except those whose only change is
6079 to replace PERL_COMMAND in the very first #! line.
6081 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6082 messages on the queue, with a bottom-up merge sort, using code contributed
6083 by Michael Haardt. This should make operations like -bp somewhat faster on
6084 large queues. It won't affect queue runners, except when queue_run_in_order
6087 51. Installed eximstats 1.31 in the distribution.
6089 52. Added support for SRV lookups to the dnslookup router.
6091 53. If an ACL referred to $message_body or $message_body_end, the value was not
6092 reset for any messages that followed in the same SMTP session.
6094 54. The store-handling optimization for building very long strings was not
6095 differentiating between the different store pools. I don't think this
6096 actually made any difference in practice, but I've tidied it.
6098 55. While running the routers to verify a sender address, $sender_address
6099 was still set to the sender address. This is wrong, because when routing to
6100 send a bounce to the sender, it would be empty. Therefore, I have changed
6101 it so that, while verifying a sender address, $sender_address is set to <>.
6102 (There is no change to what happens when verifying a recipient address.)
6104 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6105 target A or AAAA records (if not already returned) without resetting the
6106 qualify_single or search_parents options of the DNS resolver. These are
6107 inappropriate in this case because the targets of MX and SRV records must
6108 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6109 target that, when qualified, matched something in the local domain. These
6110 two options are now turned off when doing these lookups.
6112 57. It seems that at least some releases of Reiserfs (which does not have the
6113 concept of a fixed number of inodes) returns zero and not -1 for the
6114 number of available inodes. This interacted badly with check_spool_inodes,
6115 which assumed that -1 was the "no such thing" setting. What I have done is
6116 to check that the total number of inodes is greater than zero before doing
6117 the test of how many are available.
6119 58. When a "warn" ACL statement has a log_message modifier, the message is
6120 remembered, and not repeated. This is to avoid a lot of repetition when a
6121 message has many recipients that cause the same warning to be written.
6122 However, Exim was preserving the list of already written lines for an
6123 entire SMTP session, which doesn't seem right. The memory is now reset if a
6124 new message is started.
6126 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6127 debugging output unless log_rewrite was also set.
6129 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6130 of (int)(handle) when we know that handle contains (void *)(-1).
6132 61. The Exim daemon panic-logs an error return when it closes the incoming
6133 connection. However "connection reset by peer" seems to be common, and
6134 isn't really an error worthy of noting specially, so that particular error
6137 62. When Exim is trying to find all the local interfaces, it used to panic and
6138 die if the ioctl to get the interface flags failed. However, it seems that
6139 on at least one OS (Solaris 9) it is possible to have an interface that is
6140 included in the list of interfaces, but for which you get a failure error
6141 for this call. This happens when the interface is not "plumbed" into a
6142 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6143 failure of the "get flags" call assumes that the interface is down.
6145 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6146 makes life easier for people who are doing arithmetic on fields extracted
6147 from dates, where you often get leading zeros that should not be
6148 interpreted as octal.
6150 64. Added qualify_domain to the redirect router, to override the global
6153 65. If a pathologically long header line contained very many addresses (the
6154 report of this problem mentioned 10 000) and each of them was rewritten,
6155 Exim could use up a very large amount of memory. (It kept on making new
6156 copies of the header line as it rewrote, and never released the old ones.)
6157 At the expense of a bit more processing, the header rewriting function has
6158 been changed so that it no longer eats memory in this way.
6160 66. The generation of the Received: header has been moved from the time that a
6161 message starts to be received, to the time that it finishes. The timestamp
6162 in the Received: header should now be very close to that of the <= log
6163 line. There are two side-effects of this change:
6165 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6166 logged header lines no longer include the local Received: line, because
6167 it has not yet been created. The same applies to a copy of the message
6168 that is returned to a non-SMTP sender when a message is rejected.
6170 (b) When a filter file is tested using -bf, no additional Received: header
6171 is added to the test message. After some thought, I decided that this
6174 This change does not affect the value of $received_for. It is still set
6175 after address rewriting, but before local_scan() is called.
6177 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6179 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6180 gave an unhelpful panic error message, and a defer error. I have managed to
6181 change this behaviour so that it now rejects any supplied certificate,
6182 which seems right, as the list of acceptable certificates is empty.
6184 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6185 gave an unhelpful defer error. I have not managed to make this reject any
6186 supplied certificates, but the error message it gives is "no certificate
6187 supplied", which is not helpful.
6189 70. exigrep's output now also includes lines that are not associated with any
6190 message, but which match the given pattern. Implemented by a patch from
6191 Martin Sluka, which also tidied up the Perl a bit.
6193 71. Recipient callout verification, like sender verification, was using <> in
6194 the MAIL FROM command. This isn't really the right thing, since the actual
6195 sender may affect whether the remote host accepts the recipient or not. I
6196 have changed it to use the actual sender in the callout; this means that
6197 the cache record is now keyed on a recipient/sender pair, not just the
6198 recipient address. There doesn't seem to be a real danger of callout loops,
6199 since a callout by the remote host to check the sender would use <>.
6200 [SEE ABOVE: changed after hitting problems.]
6202 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6203 temporary errors. However, in the case of such a code being given after
6204 the end of a data transmission (i.e. after ".") Exim was failing to write
6205 a retry record for the message. (Yes, there was some broken host that was
6206 actually sending 8xx at this point.)
6208 73. An unknown lookup type in a host list could cause Exim to panic-die when
6209 the list was checked. (An example that provoked this was putting <; in the
6210 middle of a list instead of at the start.) If this happened during a DATA
6211 ACL check, a -D file could be left lying around. This kind of configuration
6212 error no longer causes Exim to die; instead it causes a defer error. The
6213 incident is still logged to the main and panic logs.
6215 74. Buglet left over from Exim 3 conversion. The message "too many messages
6216 in one connection" was written to the rejectlog but not the mainlog, except
6217 when address rewriting (yes!) was being logged.
6219 75. Added write_rejectlog option.
6221 76. When a system filter was run not as root (that is, when system_filter_user
6222 was set), the values of the $n variables were not being returned to the
6223 main process; thus, they were not subsequently available in the $sn
6226 77. Added +return_path_on_delivery log selector.
6228 78. A connection timeout was being treated differently from recipients deferred
6229 when testing hosts_max_try with a message that was older than the host's
6230 retry timeout. (The host should not be counted, thus allowing all hosts to
6231 be tried at least once before bouncing.) This may have been the cause of an
6232 occasionally reported bug whereby a message would remain on the queue
6233 longer than the retry timeout, but would be bounced if a delivery was
6234 forced. I say "may" because I never totally pinned down the problem;
6235 setting up timeout/retry tests is difficult. See also the next item.
6237 79. The ultimate address timeout was not being applied to errors that involved
6238 a combination of host plus message (for example, a timeout on a MAIL
6239 command). When an address resolved to a number of possible hosts, and they
6240 were not all tried for each delivery (e.g. because of hosts_max_try), a
6241 message could remain on the queue longer than the retry timeout.
6243 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6246 81. Fixed an obscure SMTP outgoing bug which required at least the following
6247 conditions: (a) there was another message waiting for the same server;
6248 (b) the server returned 5xx to all RCPT commands in the first message so
6249 that the message was not completed; (c) the server dropped the connection
6250 or gave a negative response to the RSET that Exim sends to abort the
6251 transaction. The observed case was a dropped connection after DATA that had
6252 been sent in pipelining mode. That is, the server had advertised PIPELINING
6253 but was not implementing it correctly. The effect of the bug was incorrect
6254 behaviour, such as trying another host, and this could lead to a crash.
6260 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6261 and daemon.c were passed as pointers to ints; they should have been
6262 pointers to socklen_t variables (which are typically unsigned ints).
6264 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6267 3. Fixed a really odd bug that affected only the testing scheme; patching a
6268 certain fixed string in the binary changed the value of another string that
6269 happened to be identical to the end of the original first string.
6271 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6272 name", it returns that address as the IP address. On some operating
6273 systems (e.g. Solaris), it also passes back the IP address string as the
6274 "host name". However, on others (e.g. Linux), it passes back an empty
6275 string. Exim wasn't checking for this, and was changing the host name to an
6276 empty string, assuming it had been canonicalized.
6278 5. Although rare, it is permitted to have more than one PTR record for a given
6279 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6280 all the names associated with an address, because they do in Solaris.
6281 However, it seems that they do not in Linux for data that comes from the
6282 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6283 I found this out when I moved to a new Linux workstation and tried to run
6284 the Exim test suite.
6286 To get round this problem I have changed the code so that it now does its
6287 own call to the DNS to look up PTR records when searching for a host name.
6288 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6289 addresses that are only in /etc/hosts are still found.
6291 This behaviour is, however, controlled by an option called host_lookup_
6292 order, which defaults to "bydns:byaddr". If people want to use the other
6293 order, or indeed, just use one or the other means of lookup, they can
6294 specify it in this variable.
6296 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6297 some operating systems, this comes back from gethostbyaddr() as an empty
6298 string, and this is what Exim used to test for. However, it seems that in
6299 other systems, "." is yielded. Exim now tests for this case too.
6301 7. The values of check_spool_space and check_log_space are now held internally
6302 as a number of kilobytes instead of an absolute number of bytes. If a
6303 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6304 kilobyte. This means that much larger values can be stored.
6306 8. Exim monitor: an attempt to get the action menu when not actually pointing
6307 at a message produces an empty menu entitled "No message selected". This
6308 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6309 no entries in it ("Shell widget menu has zero width and/or height"). So I
6310 have added a single, blank menu entry in this case.
6312 9. Added ${quote_local_part.
6314 10. MIME decoding is now applied to the contents of Subject: header lines when
6317 11. Now that a reference to $sender_host_address automatically causes a reverse
6318 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6319 host lookup before query-style lookups in lists that might use this
6320 variable. This has therefore been abolished, and the "net-" prefix is no
6321 longer necessary for query-style lookups.
6323 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6324 have been a typo for LFLAGS, so it has been changed.
6326 13. The install script calls Exim with "-C /dev/null" in order to find the
6327 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6328 to be output. However, since Exim outputs its version number before the
6329 error, it didn't break the script. It just looked ugly. I fixed this by
6330 always allowing "-C /dev/null" if the caller is root.
6332 14. Ignore overlarge ACL variable number when reading spool file - insurance
6333 against a later release with more variables having written the file.
6335 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6336 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6337 this, as well as the form without the "IPv6" on the front.
6339 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6340 OS/Makefile-Darwin file.
6342 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6343 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6345 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6346 variable. However, some OS use ints for inodes. I've added cast to long int
6347 to get rid of the compiler warning.
6349 19. I had forgotten to lock out "/../" in configuration file names when
6350 ALT_CONFIG_PREFIX was set.
6352 20. Routers used for verification do not need to specify transports. However,
6353 if such a router generated a host list, and callout was configured, Exim
6354 crashed, because it could not find a port number from the (non-existent)
6355 transport. It now assumes port 25 in this circumstance.
6357 21. Added the -t option to exigrep.
6359 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6360 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6361 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6362 them is set, LOOKUP_LSEARCH is forced.
6364 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6366 24. Added sender and host information to the "rejected by local_scan()" log
6367 line; previously there was no indication of these.
6369 25. Added .include_if_exists.
6371 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6372 Linux. It turns out that not all file systems support this. Apparently some
6373 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6374 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6375 not supported on the file descriptor, is now ignored when Exim is trying to
6376 sync a directory. This applies only to Linux.
6378 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6380 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6381 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6384 29. Added support for maildirsize files from supplied patch (modified a bit).
6386 30. The use of :fail: followed by an empty string could lead Exim to respond to
6387 sender verification failures with (e.g.):
6389 550 Verification failed for <xxx>
6390 550 Sender verify failed
6392 where the first response line was missing the '-' that indicates it is not
6393 the final line of the response.
6395 31. The loop for finding the name of the user that called Exim had a hardwired
6396 limit of 10; it now uses the value of finduser_retries, which is used for
6397 all other user lookups.
6399 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6402 33. Exim was neglecting to zero errno before one call of strtol() when
6403 expanding a string and expecting an integer value. On some systems this
6404 resulted in spurious "integer overflow" errors. Also, it was casting the
6405 result into an int without checking.
6407 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6408 did not work. The code looks as if it has *never* worked, though it appears
6409 to have been documented since at least release 1.62. I have made it work.
6411 35. The "timeout_DNS" error in retry rules, also documented since at least
6412 1.62, also never worked. As it isn't clear exactly what this means, and
6413 clearly it isn't a major issue, I have abolished the feature by treating it
6414 as "timeout", and writing a warning to the main and panic logs.
6416 36. The display of retry rules for -brt wasn't always showing the error code
6419 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6420 timeout_connect_A, timeout_connect_MX.
6422 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6423 to the empty sender.
6425 39. The daemon was not analysing the content of -oX till after it had closed
6426 stderr and disconnected from the controlling terminal. This meant that any
6427 syntax errors were only noted on the panic log, and the return code from
6428 the command was 0. By re-arranging the code a little, I've made the
6429 decoding happen first, so such errors now appear on stderr, and the return
6430 code is 1. However, the actual setting up of the sockets still happens in
6431 the disconnected process, so errors there are still only recorded on the
6434 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6435 connections (as happens on some IP stacks) was logged at start up time as
6436 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6437 it from "IPv6 and IPv4", which means that two separate sockets are being
6440 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6441 says whether AF_INET or AF_INET6 was passed as an argument.
6443 42. Exiwhat output was messed up when time zones were included in log
6446 43. Exiwhat now gives more information about the daemon's listening ports,
6447 and whether -tls-on-connect was used.
6449 44. The "port" option of the smtp transport is now expanded.
6451 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6452 silently ignored. Now an error message is written to the main and panic
6455 46. There's a new ACL modifier called "logwrite" which writes to a log file
6456 as soon as it is encountered.
6458 47. Added $local_user_uid and $local_user_gid at routing time.
6460 48. Exim crashed when trying to verify a sender address that was being
6463 49. Exim was recognizing only a space character after ".include". It now also
6464 recognizes a tab character.
6466 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6467 extracting the relevant information from the specification. The man page no
6468 longer contains scrambled data for the -d option, and I've added a section
6469 at the front about calling Exim under different names.
6471 51. Added "extra_headers" argument to the "mail" command in filter files.
6473 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6476 53. Installed eximstats 1.29.
6478 54. Added transport_filter_timeout as a generic transport option.
6480 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6481 Cc: header lines. This was required by RFC 822, but it not required by RFC
6484 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6485 incoming messages that did not have them. Now it does so only if the
6486 message originates locally, that is, if there is no associated remote host
6487 address. When Resent- header lines are present, this applies to the Resent-
6488 lines rather than the non-Resent- lines.
6490 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6491 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6493 58. Messages for configuration errors now include the name of the main
6494 configuration file - useful now that there may be more than one file in a
6495 list (.included file names were always shown).
6497 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6498 for those rare installations that do not start the daemon as root or run it
6499 setuid root. I've cut out the call to initgroups() if the daemon is not
6502 60. The Exim user and group can now be bound into the binary as text strings
6503 that are looked up at the start of Exim's processing.
6505 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6507 62. Added $mailstore_basename variable.
6509 63. Installed patch to sieve.c from Michael Haardt.
6511 64. When Exim failed to open the panic log after failing to open the main log,
6512 the original message it was trying to log was written to stderr and debug
6513 output, but if they were not available (the usual case in production), it
6514 was lost. Now it is written to syslog before the two lines that record the
6515 failures to open the logs.
6517 65. Users' Exim filters run in subprocesses under the user's uid. It is
6518 possible for a "deliver" command or an alias in a "personal" command to
6519 provoke an address rewrite. If logging of address rewriting is configured,
6520 this fails because the process is not running as root or exim. There may be
6521 a better way of dealing with this, but for the moment (because 4.30 needs
6522 to be released), I have disabled address rewrite logging when running a
6523 filter in a non-root, non-exim process.
6529 1. The buildconfig auxiliary program wasn't quoting the value set for
6530 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
6531 not defined. This bug was masked in 4.22 by the effect that was fixed in
6534 2. Some messages that were rejected after a message id was allocated were
6535 shown as "incomplete" by exigrep. It no longer does this for messages that
6536 are rejected by local_scan() or the DATA or non-SMTP ACLs.
6538 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
6539 have allow_domain_literals set, the ID did not get logged in the <= line.
6540 Domain literals are now always recognized in Message-ID: header lines.
6542 4. The first argument for a ${extract expansion item is the key name or field
6543 number. Leading and trailing spaces in this item were not being ignored,
6544 causing some misleading effects.
6546 5. When deliver_drop_privilege was set, single queue runner processes started
6547 manually (i.e. by the command "exim -q") or by the daemon (which uses the
6548 same command in the process it spins off) were not dropping privilege.
6550 6. When the daemon running as "exim" started a queue runner, it always
6551 re-executed Exim in the spun-off process. This is a waste of effort when
6552 deliver_drop_privilege is set. The new process now just calls the
6553 queue-runner function directly.
6559 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
6562 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
6563 ignored. Though the use of -oP was forcing the writing of a pid file, it
6564 was always written to the default place.
6566 3. If the message "no IP address found for host xxxx" is generated during
6567 incoming verification, it is now followed by identification of the incoming
6568 connection (so you can more easily find what provoked it).
6570 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
6572 5. Added some features to "harden" Exim a bit more against certain attacks:
6574 (a) There is now a build-time option called FIXED_NEVER_USERS that can
6575 be put in Local/Makefile. This is like the never_users runtime option,
6576 but it cannot be overridden. The default setting is "root".
6578 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
6579 prefix string with which any file named in a -C command line option
6582 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
6583 is retained for -C and -D only if the caller of Exim is root. Without
6584 it, the exim user may also use -C and -D and retain privilege.
6586 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
6587 command line option is disabled.
6589 6. Macro names set by the -D option must start with an upper case letter, just
6590 like macro names defined in the configuration file.
6592 7. Added "dereference=" facility to LDAP.
6594 8. Two instances of the typo "uknown" in the source files are fixed.
6596 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
6597 the Configure-Makefile script screwed up while processing it.
6599 10. Incorporated PCRE 4.4.
6601 11. The SMTP synchronization check was not operating right at the start of an
6602 SMTP session. For example, it could not catch a HELO sent before the client
6603 waited for the greeting. There is now a check for outstanding input at the
6604 point when the greeting is written. Because of the duplex, asynchronous
6605 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
6606 way, but not yet received, when the check is performed.
6608 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
6609 on TCP/IP sockets, because this apparently causes some broken clients to
6612 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
6613 unchanged) from the Cygwin maintainer.
6615 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
6616 was supported instead of testing for mbx. Effectively a typo.
6618 15. The spa authenticator server code was not checking that the input it
6619 received was valid base64.
6621 16. The debug output line for the "set" modifier in ACLs was not showing the
6622 name of the variable that was being set.
6624 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
6626 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
6627 lookup on its own. Something else was needed to trigger the lookup. For
6628 example, a match in host_lookup or the need for a host name in a host list.
6629 Now, if $sender_host_name is referenced and the host name has not yet been
6630 looked up, a lookup is performed. If the lookup fails, the variable remains
6631 empty, and $host_lookup_failed is set to "1".
6633 19. Added "eqi" as a case-independent comparison operator.
6635 20. The saslauthd authentication condition could segfault if neither service
6636 nor realm was specified.
6638 21. If an overflowing value such as "2048M" was set for message_size_limit, the
6639 error message that was logged was misleading, and incoming SMTP
6640 connections were dropped. The message is now more accurate, and temporary
6641 errors are given to SMTP connections.
6643 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
6644 (except RSET) with a 421 error, until QUIT is received. However, it was
6645 failing to send a response to QUIT.
6647 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
6648 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
6649 ACL is now run after the helo_try_verify_hosts code.
6651 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
6652 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
6653 case-independent, so other case variants are also recognized). Apparently
6654 some systems use these upper case variants.
6656 25. If more than two messages were waiting for the same host, and a transport
6657 filter was specified for the transport, Exim sent two messages over the
6658 same TCP/IP connection, and then failed with "socket operation on non-
6659 socket" when it tried to send the third.
6661 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
6663 27. The extern definition of crypt16() in expand.c was not being excluded when
6664 the OS had its own crypt16() function.
6666 28. Added bounce_return_body as a new option, and bounce_return_size_limit
6667 as a preferred synonym for return_size_limit, both as an option and as an
6670 29. Added LIBS=-liconv to OS/Makefile-OSF1.
6672 30. Changed the default configuration ACL to relax the local part checking rule
6673 for addresses that are not in any local domains. For these addresses,
6674 slashes and pipe symbols are allowed within local parts, but the sequence
6675 /../ is explicitly forbidden.
6677 31. SPA server authentication was not clearing the challenge buffer before
6680 32. log_message in a "warn" ACL statement was writing to the reject log as
6681 well as to the main log, which contradicts the documentation and doesn't
6682 seem right (because no rejection is happening). So I have stopped it.
6684 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
6685 However, I am unable to do any testing of this.
6687 34. Fixed an infelicity in the appendfile transport. When checking directories
6688 for a mailbox, to see if any needed to be created, it was accidentally
6689 using path names with one or more superfluous leading slashes; tracing
6690 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
6692 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
6693 contents are added to the log line that is written for every discarded
6694 recipient. (Previously a log_message setting was ignored.)
6696 36. The ${quote: operator now quotes the string if it is empty.
6698 37. The install script runs exim in order to find its version number. If for
6699 some reason other than non-existence or emptiness, which it checks, it
6700 could not run './exim', it was installing it with an empty version number,
6701 i.e. as "exim-". This error state is now caught, and the installation is
6704 38. An argument was missing from the function that creates an error message
6705 when Exim fails to connect to the socket for saslauthd authentication.
6706 This could cause Exim to crash, or give a corrupted message.
6708 39. Added isip, isip4, and isip6 to ${if conditions.
6710 40. The ACL variables $acl_xx are now saved with the message, and can be
6711 accessed later in routers, transports, and filters.
6713 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
6714 strings in the file are not string-expanded.
6716 42. If a MAIL command specified a SIZE value that was too large to fit into an
6717 int variable, the check against message_size_limit failed. Such values are
6718 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
6719 day this will have to be increased, but I don't think I want to be around
6720 when emails are that large.
6727 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
6728 iconv() is not standard in FreeBSD.
6730 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
6731 IPv6 enabled. The observed symptom was a segmentation fault on return from
6732 the function os_common_find_running_interfaces() in src/os.c.
6734 3. In the check_special_case() function in daemon.c I had used "errno" as an
6735 argument name, which causes warnings on some systems. This was basically a
6736 typo, since it was named "eno" in the comments!
6738 4. The code that waits for the clock to tick (at a resolution of some fraction
6739 of a second) so as to ensure message-id uniqueness was always waiting for
6740 at least one whole tick, when it could have waited for less. [This is
6741 almost certainly not relevant at current processor speeds, where it is
6742 unlikely to ever wait at all. But we try to future-proof.]
6744 5. The function that sleeps for a time interval that includes fractions of a
6745 second contained a race. It did not block SIGALRM between setting the
6746 timer, and suspending (a couple of lines later). If the interval was short
6747 and the sigsuspend() was delayed until after it had expired, the suspension
6748 never ended. On busy systems this could lead to processes getting stuck for
6751 6. Some uncommon configurations may cause a lookup to happen in a queue runner
6752 process, before it forks any delivery processes. The open lookup caching
6753 mechanism meant that the open file or database connection was passed into
6754 the delivery process. The problem was that delivery processes always tidy
6755 up cached lookup data. This could cause a problem for the next delivery
6756 process started by the queue runner, because the external queue runner
6757 process does not know about the closure. So the next delivery process
6758 still has data in the lookup cache. In the case of a file lookup, there was
6759 no problem because closing a file descriptor in a subprocess doesn't affect
6760 the parent. However, if the lookup was caching a connection to a database,
6761 the connection was closed, and the second delivery process was likely to
6762 see errors such as "PGSQL: query failed: server closed the connection
6763 unexpectedly". The problem has been fixed by closing all cached lookups
6764 in a queue runner before running a delivery process.
6766 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
6767 seem to have the "const" qualifier which it has on other OS. I've
6770 8. Change 4.21/2 was too strict. It is only if there are two authenticators
6771 *of the same type* (client or server) with the same public name that an
6772 error should be diagnosed.
6774 9. When Exim looked up a host name for an IP address, but failed to find the
6775 original IP address when looking up the host name (a safety check), it
6776 output the message "<ip address> does not match any IP for NULL", which was
6777 confusing, to say the least. The bug was that the host name should have
6778 appeared instead of "NULL".
6780 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
6781 user that is built into the binary, and the -C or -D options is used, root
6782 privilege is dropped before the configuration file is read. In addition,
6783 logging is switched to stderr instead of the normal log files. If the
6784 configuration then re-defines the Exim user, the unprivileged environment
6785 is probably not what is expected, so Exim logs a panic warning message (but
6788 However, if deliver_drop_privilege is set, the unprivileged state may well
6789 be exactly what is intended, so the warning has been cut out in that case,
6790 and Exim is allowed to try to write to its normal log files.
6796 1. smtp_return_error_details was not giving details for temporary sender
6797 or receiver verification errors.
6799 2. Diagnose a configuration error if two authenticators have the same public
6802 3. Exim used not to create the message log file for a message until the first
6803 delivery attempt. This could be confusing when incoming messages were held
6804 for policy or load reasons. The message log file is now created at the time
6805 the message is received, and an initial "Received" line is written to it.
6807 4. The automatically generated man page for command line options had a minor
6808 bug that caused no ill effects; however, a more serious problem was that
6809 the procedure for building the man page automatically didn't always
6810 operate. Consequently, release 4.20 contains an out-of-date version. This
6811 shouldn't happen again.
6813 5. When building Exim with embedded Perl support, the script that builds the
6814 Makefile was calling 'perl' to find its compile-time parameters, ignoring
6815 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
6817 6. The freeze_tell option was not being used for messages that were frozen on
6818 arrival, either by an ACL or by local_scan().
6820 7. Added the smtp_incomplete_transaction log selector.
6822 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
6823 was accepting AUTH without a new EHLO.
6825 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
6826 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
6829 10. Logging of TCP/IP connections (when configured) now happens in the main
6830 daemon process instead of the child process, so that the TCP/IP connection
6831 count is more accurate (but it can never be perfect).
6833 11. The use of "drop" in a nested ACL was not being handled correctly in the
6834 outer ACL. Now, if condition failure induced by the nested "drop" causes
6835 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
6836 or "require"), the connection is dropped.
6838 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
6839 that yield "discard" can now be used with an "accept" or a "discard" verb,
6840 but an error is generated for any others (because I can't see a useful way
6841 to define what should happen).
6843 13. When an ACL is read dynamically from a file (or anywhere else), the lines
6844 are now processed in the same way as lines in the Exim configuration file.
6845 In particular, continuation lines are supported.
6847 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
6849 15. Added -ti meaning -t -i.
6851 16. Check for letters, digits, hyphens, and dots in the names of dnslist
6852 domains, and warn by logging if others are found.
6854 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
6855 returned from GIFCONF when Exim is trying to find the list of interfaces on
6856 a host. The code in os.c has been modified to copy each ifreq to an aligned
6857 structure in all cases.
6859 Also, in some cases, the returned ifreq's were being copied to a 'struct
6860 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
6861 means the last couple of bytes of an IPv6 address could be chopped if the
6862 ifreq contained only a normal sockaddr (14 bytes storage).
6864 18. Named domain lists were not supported in the hosts_treat_as_local option.
6865 An entry such as +xxxx was not recognized, and was treated as a literal
6868 19. Ensure that header lines added by a DATA ACL are included in the reject log
6869 if the ACL subsequently rejects the message.
6871 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
6872 MD5 (which is deprecated).
6874 21. When testing a filter file using -bf, Exim was writing a message when it
6875 took the sender from a "From " line in the message, but it was not doing so
6876 when it took $return_path from a Return-Path: header line. It now does.
6878 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
6879 with a valid header line field name (a series of printing characters
6880 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
6882 23. Changed "disc" in the source to "disk" to conform to the documentation and
6883 the book and for uniformity.
6885 24. Ignore Sendmail's -Ooption=value command line item.
6887 25. When execve() failed while trying to run a command in a pipe transport,
6888 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
6889 could be confused with a return value of 69 from the command itself. This
6890 has been changed to 127, the value the shell returns if it is asked to run
6891 a non-existent command. The wording for the related log line suggests a
6892 non-existent command as the problem.
6894 26. If received_header_text expands to an empty string, do not add a Received:
6895 header line to the message. (Well, it adds a token one on the spool, but
6896 marks it "old" so that it doesn't get used or transmitted.)
6898 27. Installed eximstats 1.28 (addition of -nt option).
6900 28. There was no check for failure on the call to getsockname() in the daemon
6901 code. This can fail if there is a shortage of resources on the system, with
6902 ENOMEM, for example. A temporary error is now given on failure.
6904 29. Contrary to the C standard, it seems that in some environments, the
6905 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
6906 program. Exim now does this explicitly; it affects the formatting of
6907 timestamps using strftime().
6909 30. If exiqsumm was given junk data, it threw up some uninitialized variable
6910 complaints. I've now initialized all the variables, to avoid this.
6912 32. Header lines added by a system filter were not being "seen" during
6913 transport-time rewrites.
6915 33. The info_callback() function passed to OpenSSL is set up with type void
6916 (*)(SSL *, int, int), as described somewhere. However, when calling the
6917 function (actually a macro) that sets it up, the type void(*)() is
6918 expected. I've put in a cast to prevent warnings from picky compilers.
6920 34. If a DNS black list lookup found a CNAME record, but there were no A
6921 records associated with the domain it pointed at, Exim crashed.
6923 35. If a DNS black list lookup returned more than one A record, Exim ignored
6924 all but the first. It now scans all returned addresses if a particular IP
6925 value is being sought. In this situation, the contents of the
6926 $dnslist_value variable are a list of all the addresses, separated by a
6929 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
6930 to accept a host name and all its aliases if the forward lookup for any of
6931 them yielded the IP address of the incoming connection. Now it accepts only
6932 those names whose forward lookup yields the correct IP address. Any other
6933 names are discarded. This closes a loophole whereby a rogue DNS
6934 administrator could create reverse DNS records to break through a
6935 wildcarded host restriction in an ACL.
6937 37. If a user filter or a system filter that ran in a subprocess used any of
6938 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
6939 the wrong values were passed to the pipe command ($thisaddress had the
6940 value of $0, $0 had the value of $1, etc). This bug was introduced by
6941 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
6943 38. Improved the line breaking for long SMTP error messages from ACLs.
6944 Previously, if there was no break point between 40 and 75 characters, Exim
6945 left the rest of the message alone. Two changes have been made: (a) I've
6946 reduced the minimum length to 35 characters; (b) if it can't find a break
6947 point between 35 and 75 characters, it looks ahead and uses the first one
6948 that it finds. This may give the occasional overlong line, but at least the
6949 remaining text gets split now.
6951 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
6952 file descriptors might be low, and that setting 1000 would always raise it.
6953 It turns out that in some environments, the limit is already over 1000 and
6954 that lowering it causes trouble. So now Exim takes care not to decrease it.
6956 40. When delivering a message, the value of $return_path is set to $sender_
6957 address at the start of routing (routers may change the value). By an
6958 oversight, this default was not being set up when an address was tested by
6959 -bt or -bv, which affected the outcome if any router or filter referred to
6962 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
6963 log only when "message" or "log_message" are set. However, if one of the
6964 conditions was an address verification, or a call to a nested ACL, the
6965 messages generated by the underlying test were being passed through. This
6966 no longer happens. The underlying message is available in $acl_verify_
6967 message for both "message" and "log_message" expansions, so it can be
6968 passed through if needed.
6970 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
6971 new expansion $bh_ to give the encoded byte string without charset
6972 translation. Translation happens only if iconv() is available; HAVE_ICONV
6973 indicates this at build time. HEADERS_CHARSET gives the charset to
6974 translate to; headers_charset can change it in the configuration, and
6975 "headers charset" can change it in an individual filter file.
6977 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
6978 that creates RFC 2047 encoded "words" labels them as that charset instead
6979 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
6980 expansion operator; (ii) when Exim creates a From: line for a local
6981 message; (iii) when a header line is rewritten to include a "phrase" part.
6983 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
6984 buggy, causing it to skip the first lines of messages whose message ID
6985 ended in 'D'. This would not have bitten before Exim release 4.14, because
6986 message IDs were unlikely to end in 'D' before then. The effect was to have
6987 incorrect size information for certain domains.
6989 45. #include "config.h" was missing at the start of the crypt16.c module. This
6990 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
6993 46. If there was a timeout during a "random" callout check, Exim treated it as
6994 a failure of the random address, and carried on sending RSET and the real
6995 address. If the delay was just some slowness somewhere, the response to the
6996 original RCPT would be taken as a response to RSET and so on, causing
6997 mayhem of various kinds.
6999 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7000 when I implemented it. It didn't allow for the fact that some option values
7001 may legitimately be negative (e.g. size_addition), and it didn't even do
7002 the right test for positive values.
7004 48. Domain names in DNS records are case-independent. Exim always looks them up
7005 in lower case. Some resolvers return domain names in exactly the case they
7006 appear in the zone file, that is, they may contain uppercase letters. Not
7007 all resolvers do this - some return always lower case. Exim was treating a
7008 change of case by a resolver as a change of domain, similar to a widening
7009 of a domain abbreviation. This triggered its re-routing code and so it was
7010 trying to route what was effectively the same domain again. This normally
7011 caused routing to fail (because the router wouldn't handle the domain
7012 twice). Now Exim checks for this case specially, and just changes the
7013 casing of the domain that it ultimately uses when it transmits the message
7016 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7019 50. If a filter generated a file delivery with a non-absolute name (possible if
7020 no home directory exists for the router), the forbid_file option was not
7023 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7024 the existing equality matching.
7026 52. Exim was using ints instead of ino_t variables in some places where it was
7027 dealing with inode numbers.
7029 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7030 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7031 called TMPDIR, and if it finds it is different, it changes its value.
7033 54. The smtp_printf() function is now made available to local_scan() so
7034 additional output lines can be written before returning. There is also an
7035 smtp_fflush() function to enable the detection of a dropped connection.
7036 The variables smtp_input and smtp_batched_input are exported to
7039 55. Changed the default runtime configuration: the message "Unknown user"
7040 has been removed from the ACL, and instead placed on the localuser router,
7041 using the cannot_route_message feature. This means that any verification
7042 failures that generate their own messages won't get overridden. Similarly,
7043 the "Unrouteable address" message that was in the ACL for unverifiable
7044 relay addresses has also been removed.
7046 56. Added hosts_avoid_esmtp to the smtp transport.
7048 57. The exicyclog script was not checking for the esoteric option
7049 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7050 will work only if exicyclog is run under the appropriate euid.
7052 58. Following a discussion on the list, the rules by which Exim recognises line
7053 endings on incoming messages have been changed. The -dropcr and drop_cr
7054 options are now no-ops, retained only for backwards compatibility. The
7055 following line terminators are recognized: LF CRLF CR. However, special
7056 processing applies to CR:
7058 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7059 nor a local message in the state where . is a terminator.
7061 (ii) If a bare CR is encountered in a header line, an extra space is added
7062 after the line terminator so as not to end the header. The reasoning
7063 behind this is that bare CRs in header lines are most likely either
7064 to be mistakes, or people trying to play silly games.
7066 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7067 was being incorrectly given as 18 bytes larger than it should have been.
7068 This is a VOB (very old bug).
7070 60. This may never have affected anything current, but just in case it has:
7071 When the local host is found other than at the start of a list of hosts,
7072 the local host, those with the same MX, and any that follow, are discarded.
7073 When the list in question was part of a longer list of hosts, the following
7074 hosts (not currently being processed) were also being discarded. This no
7075 longer happens. I'm not sure if this situation could ever has previously
7078 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7081 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7082 header. This is something that is recommended in a new Internet Draft, and
7083 is something that is documented as being done by Sendmail. There are two
7084 possible values. For messages generated by the autoreply transport, Exim
7087 Auto-Submitted: auto-replied
7089 whereas for all other generated messages (e.g. bounces) it adds
7091 Auto-Submitted: auto-generated
7093 63. The "personal" condition in filters now includes a test for the
7094 Auto-Submitted: header. If it contains the string "auto-" the message it
7095 not considered personal.
7097 64. Added rcpt_include_affixes as a generic transport option.
7099 65. Added queue_only_override (default true).
7101 66. Added the syslog_duplication option.
7103 67. If what should have been the first header line of a message consisted of
7104 a space followed by a colon, Exim was mis-interpreting it as a header line.
7105 It isn't of course - it is syntactically invalid and should therefore be
7106 treated as the start of the message body. The misbehaviour could have
7107 caused a number of strange effects, including loss of data in subsequent
7108 header lines, and spool format errors.
7110 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7111 client host had authenticated. This control can now be exercised by an ACL
7112 for more flexibility.
7114 69. By default, callouts do not happen when testing with -bh. There is now a
7115 variant, -bhc, which does actually run the callout code, including
7116 consulting and updating the callout cache.
7118 70. Added support for saslauthd authentication, courtesy of Alexander
7121 71. If statvfs() failed on the spool or log directories while checking their
7122 size for availability, Exim confusingly gave the error "space shortage".
7123 Furthermore, in debugging mode it crashed with a floating point exception.
7124 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7125 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7126 serious problem, Exim now writes to the main and panic logs when this
7127 happens, with details of the failure. It then refuses to accept the
7128 incoming message, giving the message "spool directory problem" or "log
7129 directory problem" with a 421 code for SMTP messages.
7131 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7132 0, 1, and 2 exist, because some OS complain for execs without them (see
7133 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7134 descriptors. However, the code omitted to check that the open succeeded,
7135 causing mysterious errors if for some reason the permissions on /dev/null
7136 got screwed. Now Exim writes a message to the main and panic logs, and
7137 bombs out if it can't open /dev/null.
7139 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7140 interact so that it is all more flexible. It is supposed to remain
7141 backwards compatible. Also added extra_local_interfaces.
7143 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7144 to bomb out with an assertion failure - to the client this appears as a
7145 connection drop. This problem occurs in the part of the code that was taken
7146 from the Samba project. Fortunately, the assertion is in a very simple
7147 function, so I have fixed this by reproducing the function inline in the
7148 one place where it is called, and arranging for authentication to fail
7149 instead of killing the process with assert().
7151 75. The SPA client code was not working when the server requested OEM rather
7152 than Unicode encoding.
7154 76. Added code to make require_files with a specific uid setting more usable in
7155 the case where statting the file as root fails - usually a non-root-mounted
7156 NFS file system. When this happens and the failure is EACCES, Exim now
7157 forks a subprocess and does the per-uid checking as the relevant uid.
7159 77. Added process_log_path.
7161 78. If log_file_path was not explicitly set, a setting of check_log_space or
7162 check_log_inodes was ignored.
7164 79. If a space check for the spool or log partitions fails, the incident is now
7165 logged. Of course, in the latter case the data may get lost...
7167 80. Added the %p formatting code to string_format() so that it can be used to
7168 print addresses in debug_print(). Adjusted all the address printing in the
7169 debugging in store.c to use %p rather than %d.
7171 81. There was a concern that a line of code in smtp_in.c could overflow a
7172 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7173 initially expressed, the concern was not well-founded, because trailing
7174 spaces are removed early. However, if the trailing spaces were followed by
7175 a NULL, they did not get removed, so the overflow was possible. Two fixes
7178 (a) I re-wrote the offending code in a cleaner fashion.
7179 (b) If an incoming SMTP command contains a NULL character, it is rejected
7182 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7183 runs initgroups(), so that if the Exim user is in any additional groups,
7184 they will be used during message reception.
7190 The change log for 4.20 and earlier releases has been archived.
projects / user / henk / code / exim.git / blob