control = submission
control = dkim_disable_verify
+ # Insist that a HELO/EHLO was accepted.
+
+ require message = nice hosts say HELO first
+ condition = ${if def:sender_helo_name}
+
# Insist that any other recipient address that we accept is either in one of
# our local domains, or is in a domain for which we explicitly allow
# relaying. Any other domain is rejected as being unacceptable for relaying.
acl_check_data:
+ # Deny if the message contains an overlong line. Per the standards
+ # we should never receive one such via SMTP.
+ #
+ deny condition = ${if > {$max_received_linelength}{998}}
+
# Deny if the message contains a virus. Before enabling this check, you
# must install a virus scanner and set the av_scanner option above.
#
# This transport is used for delivering messages over SMTP connections.
+# Refuse to send any messsage with over-long lines, which could have
+# been receved other than via SMTP. The use of message_size_limit to
+# enforce this is a red herring.
remote_smtp:
driver = smtp
+ message_size_limit = ${if > {$max_received_linelength}{998} {1}{0}}
# This transport is used for local delivery to user mailboxes in traditional