dnslists.otl

   1 TODO
   2         check and link (de)listing policy
   3                 NOGO: delisting for money
   4         check and link usage policy
   5         check and link return codes
   6         find newsfeed or mailinglist
   7         give feedback?
   8         implement in exim
   9         implement in SA
  10         implement in rspamd
  11 00_META
  12         https://bugs.launchpad.net/ubuntu/+source/amispammer/+bug/835614
  13         http://www.blalert.com/dnsbls
  14         http://www.dnsbl.info/dnsbl-list.php
  15         http://dnsbl.inps.de/index.cgi?lang=en&site=00002
  16         http://www.sdsc.edu/~jeff/spam/cbc.html
  17         http://moensted.dk/spam/
  18         https://whatismyipaddress.com/blacklist-check
  19         https://multirbl.valli.org/
  20         https://glockapps.com/blacklist/
  21         https://docs.hetrixtools.com/monitored-blacklists/
  22         https://www.blacklistmaster.com/
  23         https://knowledge.validity.com/hc/en-us/sections/204468388-Blocklists
  24         https://github.com/zbetcheckin/DNSBLs
  25         https://en.wikipedia.org/wiki/Comparison_of_DNS_blacklists
  26         https://www.impressionwise.com/kb/threats/rbl-advisories.html
  27 00_ELANG
  28         http://dnsbl.aspnet.hu/
  29                 hungarian?
  30         http://spam-rbl.fr/
  31                 french
  32         https://mav.com.br/
  33                 maybe? they have antispam but it’s all portugese? or spanish? no idea
  34 00_DEAD
  35         http://openrbl.org/
  36                 as seems dead
  37                         404s
  38                         wiki is down
  39         http://mailhosts.org/
  40                 dead
  41                         https://www.blalert.com/dnsbl/shortlist.mailhosts.org
  42         blitzed.org
  43                 dead since 2006
  44                         https://www.dnsbl.com/2007/02/status-of-opmblitzedorg-dead.html
  45                                 referenced ML post is 404
  46         blackholes.five-ten-sg.com
  47                 Offline as of 1/1/2013
  48                         https://whatismyipaddress.com/five-ten-sg
  49         dynip.rothen.com
  50                 On 9/29/2020 the ROTHEN blacklist appears to have started to list the entire internet
  51                         https://www.dnsbl.info/dnsbl-details.php?dnsbl=dynip.rothen.com
  52         fl.chickenboner.biz
  53                 dead since 2011
  54                         https://community.spiceworks.com/topic/329762-blacklist-removal
  55                         https://bugs.launchpad.net/ubuntu/+source/amispammer/+bug/835614
  56                 website contains spam/crap
  57         http://cart00ney.surriel.com/
  58                 cart00ney.org is dead
  59         http://dsbl.org/
  60                 points to surriel.com
  61         http://csma.biz/
  62                 domain is for sale
  63                 dead since 2013
  64                         https://www.dnsbl.com/2013/02/status-of-blcsmabiz-dead.html
  65         http://dnsbl.net.au/
  66                 website contains info about living in australia? called "AusBlog"
  67                 http://www.dnsbl.com/2009/04/status-of-dnsblnetau-dead.html
  68         http://moensted.dk/spam/
  69                 dead since 2010
  70                 https://moensted.dk/spam/
  71         http://rbl.mw-internet.net/
  72                 domain was parked
  73                 2023: it is an asian(?) gambling(?) website
  74         http://www.blackholes.us/
  75                 dead since 2009
  76                         https://www.dnsbl.com/2009/10/status-of-blackholesus-dead.html
  77         http://www.deadbeef.com/
  78                 dead, no info
  79         spamsources.dnsbl.info
  80                 dead since 2011 or so
  81                         http://www.dnsbl.info/spamsources-dnsbl-defunct.php
  82         http://www.gweep.ca/
  83                 domain dead, no other info
  84         http://www.njabl.org/
  85                 dead since 2013
  86                         https://en.wikipedia.org/wiki/Not_Just_Another_Bogus_List
  87         http://wytnij.to/
  88                 website parked, no other info
  89         https://www.transip.nl/
  90                 dead since 2013
  91                         https://www.blalert.com/dnsbl/proxy.block.transip.nl
  92                         https://www.blalert.com/dnsbl/residential.block.transip.nl
  93         pss.spambusters.org.ar
  94                 NXDOMAIN
  95         rbl.snark.net
  96                 NXDOMAIN
  97                 https://snark.net/ gives access denied
  98         whois.rfc-ignorant.org
  99                 NXDOMAIN
 100                 rfc-ignorant.org registered but no A/AAAA record
 101                 dead since 2012
 102                         http://www.h-online.com/security/news/item/RFC-Ignorant-org-blacklist-closes-down-1724814.html
 103                         https://www.dnsbl.com/2012/09/status-of-rfc-ignorantorg-shutting-down.html
 104         will-spam-for-food.eu.org
 105                 unmaintained
 106                 dead
 107                         https://rfc1149.net/blog/2012/01/22/who-did-resurrect-will-spam-for-food/
 108         http://proxybl.org/
 109                 dead, seemingly written on http://proxybl.org/blog but that’s also dead
 110                 https://linuxreviews.org/Mail_Spam_Blacklists
 111                 https://community.sophos.com/utm-firewall/f/web-server-security/50273/dnsbl-proxybl-org-offline
 112         dev.null.dk
 113                 timeout, also on the parent null.dk
 114                 effectively dead
 115         dnsbl.mags.net
 116                 seems dead, no info to be found
 117                 domain does not respond
 118         http://msrbl.blogspot.ch/
 119                 http://msrbl.blogspot.com/ says "no updates" since 2010 but supposed to be reactivated
 120                 effectively dead
 121         http://www.olsentech.net/
 122                 strange content on web
 123                 effectively dead
 124         rbl.orbitrbl.com
 125                 http://www.orbitrbl.com/
 126                 timeout
 127         rbl.polarcomm.net
 128                 NXDOMAIN
 129                 registered but no A/AAAA record
 130         cidr.bl.mcafee.com
 131                 https://kc.mcafee.com/corporate/index?page=content&id=KB53783
 132                         404
 133                 no info to be found
 134                 dead?
 135         http://anti-spam.org.cn/?locale=en_US
 136                 unreachable DNS
 137         rbl.talkactive.net
 138                 seems dead
 139                 talkactive.net redirects twice to some hosting company
 140                 last listings in 2017
 141                         https://multirbl.valli.org/detail/rbl.talkactive.net.html
 142                         https://www.blacklistmaster.com/blacklists?view=details&blacklist=rbl.talkactive.net
 143         dnsbl.ipocalypse.net
 144                 no policies published
 145                 dead
 146                         was a private list of an irc network
 147                         network was renamed idlechat.net in 2014
 148                         became a discord chat in 2022(?)
 149         http://blakjak.net/RBL
 150                 external access disabled
 151                 2023: seems dead, website is a weird error
 152                 https://www.blalert.com/dnsbl/rbl.blakjak.net
 153                         This is a private list that we do not monitor as the maintainer has explicity announced that the list is for his personal use
 154         http://cyberlogic.net/
 155                 french (canada)
 156                 https://www.dnsbl.info/dnsbl-details.php?dnsbl=dnsbl.cyberlogic.net
 157                         On or about 5/21/2018 the cyberlogic DNSBL ceased functioning properly.
 158                 https://www.dnsbl.com/2018/05/
 159                         As reported on the mailop mailing list on Friday May 25, 2018, the blocking list at dnsbl.cyberlogic.net now contains a "wildcard" DNS entry, effectively listing the entire internet
 160         http://www.rbl.jp/allrbl-e.html
 161                 website asks for login or just errors
 162         http://www.spamhauswhitelist.com/en/
 163                 looks like a parked domain with ads
 164         http://stopspam.org/rblcheck/index.php
 165                 aka dul.pacifier.net
 166                 http://www.stopspam.org/rbl-info/
 167                         stopped in 2013
 168         http://countries.nerd.dk/
 169                 unable to connect, also for nerd.dk
 170         http://dul.ru/dul.en.html
 171                 DEAD for sale
 172         http://dns.measurement-factory.com/surveys/openresolvers.html
 173                 dead
 174                         »The following text describes past open DNS resolver surveys and an associated DNS lookup service that has been long shut down«
 175         http://www.sectoor.de/tor.php
 176                 timeouts
 177         http://anticaptcha.net/
 178                 for sale
 179         http://blacklist.lashback.com/
 180                 query zone: ubl.unsubscore.com
 181                 provider’s website https://lashback.com/ seems alive and active (news entries from 2023) but does not link to the blacklist
 182                 rsync URLs seem dead, so does the download url
 183         http://blacklist.woody.ch/
 184                 no entries in the displayed "top 100"
 185                 may have been absorbed into the swinog blacklists, see antispam.imp.ch
 186         http://cbl.abuseat.org/
 187                 https://www.abuseat.org/
 188                         changes to the CBL that occured in January 2021. In short, the CBL infrastructure was replaced by the Spamhaus XBL structure
 189         http://dnsbl.burnt-tech.com/
 190                 domain is for sale
 191         http://rbl.dns-servicios.com/rbl.php
 192                 website can not be found
 193         http://spamcannibal.org/
 194                 dead, as of at least 2018
 195         http://st.technovision.dk/
 196                 https://docs.hetrixtools.com/st-technovision-dk-inactive-removed/
 197                         [December 8, 2021] This RBL has stopped responding to DNS queries.
 198         http://spamstinks.com/
 199                 cert is for generic hostname
 200                 website shows some login form
 201         http://virbl.bit.nl/
 202                 https://www.rollernet.us/2017/01/shutdown-of-virbl-dnsbl-bit-nl/
 203                         January 23, 2017: »The Virbl-project site has been replaced by this static message to inform those that find their ways here. The Virbl DNSBL-zone was emptied and will be removed all together at a moment further on in the future.«
 204         http://www.blocklist.de/en/index.html
 205                 lots of timeouts as of 2023
 206                 forum link is dead, among others
 207                 seems unmaintained but alive
 208                 latest news is from 2016
 209                 latest blog entry from 2022
 210                         Abusix, a network security company for mail security and abuse report handling, takes over blocklist.de to integrate it within its Abusix platform to further improve its data quality.
 211         http://www.emailbasura.org/cgi-bin/emailbasura-ini.pl?lang=eng
 212                 placeholder/parked?
 213         http://www.leadmon.net/spamguard/
 214                 website times out
 215         http://www.srntools.com/blacklist/
 216                 redirects to comodo.com subdomain where I can’t find any information about a DNSBL
 217 00_NEEDS_RECHECK
 218         https://antispam.imp.ch/
 219                 no usage policy
 220                 no return code info
 221                 no good listing policy
 222                 information received from inquiry to provider
 223                         website will be updated
 224                         return codes
 225                                 dnsrbl.swinog.ch and uribl.swinog.ch (holding time increases with hits)
 226                                         127.0.1.8 = default
 227                                         127.0.0.10 => TRAP (Email sent to a spamtrap)
 228                                         127.0.0.11 => REPO (Email reported as Spam by customer)
 229                                 spamrbl.imp.ch (3 days holding time)
 230                                         IPs are listed when trying to send mail to the spamtrap mailserver
 231                                         MD5 hash: attachment sent to the swinog blacklist
 232                                 wormrbl.imp.ch
 233                                         DEAD
 234         http://blacklist.woody.ch/rblcheck.php3
 235                 dead?
 236                 waiting for feedback
 237         http://dnsbl.iip.lu/
 238                 https://docs.hetrixtools.com/lookup-dnsbl-iip-lu-false-positive-removed/
 239                         in 2016: lookup.dnsbl.iip.lu blacklist started issuing false positive responses and upon further investigation looks to be abandoned/dead.
 240                 https://www.blalert.com/dnsbl/lookup.dnsbl.iip.lu
 241                         This blacklist is marked as "shut down" and non-operational as of 2017-12-31.
 242         http://dnsbl.inps.de/
 243                 timeout
 244                 https://www.dnsbl.com/search/label/dnsbl.inps.de
 245                         Today, May 25, 2020, he has announced that it is shutting down, due to concerns around GDPR and personal challenges brought on by the coronavirus pandemic.
 246                 https://docs.hetrixtools.com/dnsbl-inps-de-removed-from-our-system/
 247                         [May 29,2018] IPv4 RBL dnsbl.inps.de has been removed from our system, as they have decided to discontinue the RBL project for the time being.
 248                 https://glockapps.com/blacklist/dnsbl-inps-de/
 249                         Today, May 25, 2020, he has announced that it is shutting down, due to concerns around GDPR and personal challenges brought on by the coronavirus pandemic.
 250                 https://www.dnsbl.info/dnsbl-details.php?dnsbl=dnsbl.inps.de
 251                         This blacklist is offline as of May 1, 2020.
 252                 https://web.archive.org/web/20220428013500/http://www.inps.de/
 253 00_NEEDS_RESEARCH
 254         bl.tiopan.com
 255         blocked.hilli.dk
 256         dialups.visi.com
 257         dnsbl.antispam.or.id
 258         dob.sibl.support-intelligence.net
 259         intruders.docs.uu.se
 260         map.spam-rbl.com
 261         rbl.triumf.ca
 262         all.s5h.net
 263                 http://www.usenix.org.uk/content/rbl.html
 264         torexit.dan.me.uk
 265         http://pedantic.org/
 266                 as of 20140701
 267         rbl.fasthosts.co.uk
 268                 https://help.fasthosts.co.uk/app/answers/detail/a_id/140/kw/rbl
 269                 seems dead?
 270                 https://antispam.fasthosts.co.uk/
 271 00_ALIVE
 272         00_RECONSIDER
 273                 http://barracudacentral.org/rbl
 274                         requires account with extensive information (more than spamhaus e.g.):
 275                                 your name.
 276                                 your company name.
 277                                 your phone number.
 278                                 your address.
 279                                 your city name.
 280                                 your state/province name.
 281                                 your zip/postal code.
 282                                 the name of the alternate contact.
 283                                 the phone number of the alternate contact.
 284                                 the email address of the alternate contact.
 285                         seems well documented
 286         00_E_EVIL
 287                 sbl.nszones.com
 288                         http://www.spamhaus.org/organization/statement/008/fake-dnsbl-uncovered-nszones.com
 289                 http://www.backscatterer.org/
 290                         questionable policy - pay for (quicker) delisting
 291                         https://support.hornetsecurity.com/hc/en-us/articles/360011880797-Why-are-Hornetsecurity-IP-addresses-listed-at-Backscatterer-
 292                                 as of December 29, 2021: »The removal at the blacklist backscatterer.org can only be done for a fee«
 293                         https://www.warmy.io/blog/backscatterer-blacklist-how-to-remove-your-ip-from-it
 294                                 in March 17, 2023 does not mention need to pay
 295                         https://support.forcepoint.com/s/article/Forcepoint-IP-s-blocklisted-by-UCEProtect-and-Backscatterer-org
 296                                 recommend against using it
 297                         https://whatismyipaddress.com/backscatterer
 298                                 mentions strict delisting process and "express delisting" but nothing further
 299                         https://bobcares.com/blog/backscatterer-blacklist/
 300                                 goes through the process with screenshots showing express delisting for 109$
 301                         https://community.cisco.com/t5/email-security/issues-with-www-backscatterer-org-any-one/td-p/1298377
 302                                 more opinions
 303                         https://www.titanhq.com/blog/warning-ignore-pay-for-de-listing-blacklist-service/
 304                                 Jan 17th, 2020: »UCEProtect also charges a delisting fee. TitanHQ discourages email administrators from using the UCEProtect blacklist and we do not recommend paying for list removal«
 305                         https://web.archive.org/web/20150320180344/http://www.jvfconsulting.com/blog/130/Backscatterer_Network_Spam_List_Is_Another_UCEPROTECT_Extortion_Scam.html
 306                                 another opinion
 307         00_E_INFORMATION
 308                 blacklist.sci.kun.nl
 309                         https://cncz.science.ru.nl/en/howto/email-spam/
 310                         not really its own DNSBL?
 311                         no usage information
 312                         no usage policy
 313                 http://anonmails.de/
 314                         seems serious but missing necessary info
 315                                 usage policy
 316                                 listing policy
 317                 http://blacklist.jippg.org/
 318                         no usage policy
 319                         no listing policy
 320                         no return code info
 321                 bip.virusfree.cz
 322                         used by rspamd
 323                         https://www.virusfree.cz/en/help is the only place I can find any official reference to this list at all but no policies or usage information
 324                 https://www.nixspam.net/
 325                         previously http://www.dnsbl.manitu.net/
 326                         query zone: ix.dnsbl.manitu.net
 327                         provided by the reputable german publisher 'heise' which makes the high quality c’t, iX, and telepolis magacines
 328                         difficult to find info regarding listing policy
 329                         asked for more information to be added
 330                                 https://www.heise.de/forum/iX/Kommentare/Gemeinsam-stark/Nutzungsbedingungen-Return-Codes-sonstige-Infos/posting-42669177/show/
 331                 access.redhawk.org
 332                         website works but barely any info, not even how to query it
 333                         https://www.redhawk.org/?p=64
 334                         https://www.redhawk.org/SpamHawk/index.php
 335                 https://senderscore.org/
 336                         requires registration?
 337                         Scam? http://www.complaintsboard.com/complaints/buyer-beware-senderscoreorg-is-a-scam-c276871.html
 338                         https://senderscore.org/assess/blocklist-lookup/
 339                         FAQ: https://knowledge.validity.com/hc/en-us/articles/360006992592-Return-Path-Blocklist-RPBL-FAQ-
 340                         no information how to query found
 341                 mail-abuse.org
 342                         https://ers.trendmicro.com/
 343                         trendmicro paid service
 344                         https://docs.trendmicro.com/en-us/enterprise/email-reputation-services-online-help/getting-started_001/configuring-email-re/creating-an-account.aspx
 345                                 »If you don’t create an account, you can still query the reputation of an IP address«
 346                         I don’t find any pricing or usage information
 347                 http://dnsbl.tornevall.org/
 348                         https://www.tornevall.net/
 349                         related to https://www.fraudbl.org/
 350                         seems a bit unstructured and not very well documented
 351                                 I can’t be arsed to deal with confluence slowing my browser to a halt repeatedly and it’s really hard to navigate but there seems to be some information on https://docs.tornevall.net/display/TORNEVALL/Endpoint%3A+dnsbl+-+DNSBL+v5+with+API+v3
 352                         seems active
 353                 http://rbl.schulte.org/
 354                         seems active
 355                         listing policy seems to be: they received spam from an IP
 356                         usage policy: Anyone can use this RBL list [sic]
 357                         return codes: probably boolean, i.e. either listed or not
 358                 http://relaytest.kundenserver.de/
 359                         by 1und1 (now ionos?), used internally
 360                         https://www.blalert.com/dnsbl/relays.bl.kundenserver.de
 361                         no usage policy found
 362                         no listing policy found
 363                         no return code explanation found
 364                 http://www.blockedservers.com/
 365                         no usage policy
 366                         no listing policy
 367                         no documentation
 368                         "funny":
 369                                 No rights given; all rights are in the dumpster; Copyleft 2012 - 3013 - page generated in 0.009843111038208 secs
 370                 https://choon.net/dnsbl.php
 371                         no usage policy or instructions
 372                         no listing policy
 373                         only automatic delisting after 30 days
 374         00_E_PAID
 375         00_E_PRIVATE
 376                 88.blacklist.zap
 377                         http://blogs.technet.com/b/fss/archive/2009/05/08/forefront-dnsbl-yeah-or-nay.aspx
 378                         https://web.archive.org/web/20150812003556/http://blogs.technet.com/b/fss/archive/2009/05/08/forefront-dnsbl-yeah-or-nay.aspx
 379                         https://www.blalert.com/dnsbl/88.blacklist.zap
 380                                 88.blacklist.zap is an internal blacklist maintained by Microsoft's Forefront
 381                         https://www.dnsbl.com/search/label/frontbridge
 382                 http://drmx.org/
 383                         »Use of any DrMX.ORG DNS Zone is by request and by contract only.«
 384                 rbl.tdk.net
 385                         tdk.net seems dead on http(s)
 386                         private
 387                                 https://www.blalert.com/dnsbl/rbl.tdk.net
 388                         old link: http://postmaster.tdc.dk/publish.php?id=31787
 389                                 tdc.dk redirects to yousee.dk
 390                                 https://web.archive.org/web/20170703084224/http://postmaster.tdc.dk/publish.php?id=31787
 391                 rbl.zenon.net
 392                         private
 393                                 https://www.blalert.com/dnsbl/rbl.zenon.net
 394                         http://www.noc.zenon.net/rbl/
 395                         russian(?)
 396                 https://ahbl.org/
 397                         was public until 2015
 398                         now private, invite-only
 399         http://rfc-clueless.org/
 400                 lists domains
 401                         that do not adhere to common best practices or requirements
 402                 does NOT list spammers!
 403                 listing criteria are explained well
 404                         http://rfc-clueless.org/pages/listing_policy
 405                 return codes are explained
 406                         http://rfc-clueless.org/
 407                 usage policy is not so clear but the FAQ implies that it’s just free to use for everyone
 408                 many timeouts
 409                         first noticed in 2014 and deactivated
 410                         retried in 2023 and still the case
 411         http://spameatingmonkey.com/
 412                 lists IPs
 413                         that sent backscatter
 414                         that sent to spamtrap
 415                         added by policy
 416                                 this includes dial-up!
 417                                 https://spameatingmonkey.com/faq/policy-based-listing
 418                 lists domains/URIs
 419                         by age
 420                         in spam bodies
 421                 usage policy seems clear
 422                         https://spameatingmonkey.com/faq/query-limits
 423                 listing policy seems clear
 424                         https://spameatingmonkey.com/services
 425                 return codes documented
 426                         https://spameatingmonkey.com/services
 427                 http://blogspambl.com/
 428                         redirects to spameatingmonkey.com
 429         http://uribl.com/
 430                 lists domains/URIs
 431                         that appear in spam bodies
 432                         has whitelist
 433                 lists IPs
 434                         that URIs in spam bodies resolve to
 435                 return codes are documented
 436                         https://uribl.com/about.shtml#implementation
 437                         bitmasked
 438                         127.0.0.1 is used to signal abusive query behaviour
 439         http://wiki.junkemailfilter.com/index.php/Spam_DNS_Lists
 440                 called "hostkarma"
 441                 lists domains/URIs
 442                 lists IPs
 443                 usage policy is relatively clear that it’s free, except maybe for big for-profit oranizations
 444                 listing policy is documented
 445                 return codes are documented
 446                 seems very trustworthy
 447         http://www.sorbs.net/
 448                 good reputation
 449                 lists domains/URIs
 450                 lists IPs
 451                 usage policy is clear that it’s free
 452                 listing policy is documented
 453                 return codes are documented
 454                 seems trustworthy
 455         http://www.spamhaus.org/
 456                 good reputation
 457                 very well done
 458                 seems very professional
 459                 lists domains/URIs
 460                 lists IPs
 461                 usage policy is clear
 462                         https://www.spamhaus.org/organization/dnsblusage/
 463                 listing policies are clearly documented
 464                 return codes are clearly documented
 465         http://www.surbl.org/
 466                 good reputation
 467                 lists domains/URIs
 468                 usage policy is clear
 469                         https://surbl.org/usage-policy
 470                 listing policy is documented
 471                 return codes are documented
 472                         bitmasked
 473                         127.0.0.1 means blocked
 474         http://zapbl.net/
 475                 lists domains/URIs
 476                 lists IPs
 477                 listing policy seems clear
 478                         https://zapbl.net/policy
 479                 usage policy seems clearly free for everyone
 480                         https://zapbl.net/using
 481                 return codes are documented
 482                 seems well done
 483         https://rbl.foobar.hu/
 484                 lists domains/URIs
 485                 lists IPs
 486                 listing policy seems clear
 487                 usage policy seems clearly free for everyone
 488                 return codes are documented
 489                 possibly unmaintained or dead
 490                         footer says: ©2013-14
 491         http://apews.org/?page=filter
 492                 questionable
 493                         https://www.dnsbl.com/search/label/apews
 494                         https://whatismyipaddress.com/apews
 495                 dead?
 496                         no news on http://apews-user.blogspot.com/ since 2014
 497                 not further looked into because of the above
 498         https://www.dnswl.org/
 499                 seems to be run with best intentions but has had issues from what I have heard from some users
 500                 IRC channel has some activity
 501                 usage policy relatively clear
 502                         free within certain limits
 503                 listing policy
 504                         self-service
 505                 return codes are documented
 506         00_E_FOCUS
 507                 https://www.dnsblchile.org/index.en.html
 508                         chilenian spam so not interesting for me
 509                         seems alive
 510         00_LISTS_BLOGSPAMMERS
 511                 https://www.madavi.de/madavibl/
 512                         »This blacklist should only be used to block comment spammer (on blogs and websites). Don’t use it for mail.«
 513                 http://bsb.empty.us/
 514                         does not exist anymore
 515                         empty.us returns »Nothing here, obviously.«
 516         00_LISTS_COUNTRIES
 517                 korea
 518                         http://korea.services.net/
 519         00_LISTS_DIALUPS
 520         00_LISTS_OPENRESOLVERS
 521         00_LISTS_TORNODES
 522                 https://www.dan.me.uk/dnsbl
 523                 http://rbl.efnetrbl.org/
 524                         aka http://tor.efnet.org/
 525                         lists IPs
 526                         lists open proxies, infected machines, tornodes, etc.
 527         https://0spam.org/
 528                 clear information on usage policy
 529                         Nothing. The 0Spam Project is absolutely free for email providers, IT professionals and general removal request.
 530                         DNSBL service and removals are 100% for free for all uses; commercial, non profit and personal.
 531                 seems serious
 532                 listing policies are a little less clear
 533                         bl.0spam.org DNSBL | 0spam Spam Trap Primary Database
 534                         nbl.0spam.org Network Black List | Spam Source Networks, high volume of spam trap hits in a Class C block will result in network listings in this DNSBL.
 535                         url.0spam.org URL Black List | This list contains the IP address of domains found to be in the source of spam emails found in our traps.
 536                 return codes not very clear
 537         https://abuse.ro/
 538                 policy
 539                         spamtraps
 540                         The last IP address before destination in the email headers is listed into rbl.abuse.ro list.
 541                         Sender domains are analyzed and if confirmed to be not spoofed, are listed into dbl.abuse.ro list
 542                         Spamvertized domains (including those indirectly linked through services like bit.ly) are listed into uribl.abuse.ro list
 543         http://dronebl.org/
 544                 usage policy is clear: free for whatever
 545                 listing policy is not quite so clear
 546                         can be mostly inferred from the classes but not entirely clear IMHO
 547                 has an IRC channel
 548                 return codes
 549                         not explicitly mentioned but it’s 127.0.0.X where X is the class from https://dronebl.org/classes
 550         http://psbl.org/
 551                 query zone: psbl.surriel.com
 552                 no usage policy, but seems implied that usage is free
 553                 listing policy
 554                         no explicit, complete policy given but sending to spamtraps is mentioned to get you listed and seems the exclusive mechanism
 555                 return codes
 556                         not documented, probably only boolean
 557         http://rbldata.interserver.net/
 558                 listing policy more or less clear
 559                 usage policy not given but since usage is explained it’s probably free for all
 560                 return codes seem to be binary, i.e. either listed or not
 561                 lists IPs
 562                 lists domains/URIs
 563         http://rv-soft.info/
 564                 usage policy not explicit but seems to be free
 565                 listing policy also not explicit but can be inferred from return code explanation
 566                 return codes are explained
 567         http://spamrats.com/
 568                 clear usage policy (ToS)
 569                 listing policies documented
 570                 return codes of aggregated list documented
 571                 lists IPs
 572         http://v4bl.org/
 573                 usage policy documented
 574                 listing policy not really clear
 575                 return codes documented
 576         http://wpbl.info/
 577                 listing procedure is documented
 578                 usage policy implied: free to use
 579                 return codes documented
 580         http://www.aupads.org/
 581                 aka www.antispam-ufrj.pads.ufrj.br
 582                 aka www.orve.org
 583                 listing policy more or less clear
 584                 lists IPs and FQDNs
 585                 usage policy seems clear: freely exported by anybody who wants to use them«
 586         http://www.gbudb.com/truncate/
 587                 listing policy
 588                 usage policy seems implied: free use
 589                 return codes documented
 590                 »Truncate is very conservative. On most systems it can be safely used to reject connections!«
 591         http://www.justspam.org/
 592                 listing policy documented
 593                         warning: relies on listings in other DNSBLs! also for delisting!
 594                 usage policy clear
 595                 return codes: binary
 596         http://www.kempt.net/dnsbl/
 597                 listing policy documented
 598                 usage policy documented
 599                 return codes undocumented
 600         http://www.spamcop.net/
 601                 listing policy documented
 602                         The SCBL is aggressive and often errs on the side of blocking mail
 603                 usage policy is: free
 604                 good reputation
 605                 return codes documented
 606         http://www.spamsources.fabel.dk/
 607                 usage policy is: free
 608                 listing policy seems clear
 609                 lists IPs
 610         http://www.uceprotect.net/en/index.php
 611         https://bl.konstant.no/
 612         https://www.abuse.ch/
 613                 https://www.abuse.ch/?tag=httpbl
 614         https://www.kisarbl.or.kr/
 615         https://www.megarbl.net/
 616         https://www.team-cymru.org/Services/Bogons/dns.html
 617         http://mailspike.net/usage.html
 618                 reputation-based
 619         http://www.whitelisted.org/
 620                 paid subscription
 621                 policy on site
 622         https://puck.nether.net/or/
 623                 policies on website
 624         http://www.isipp.com/email-accreditation/iadb-query-instruction/
 625                 requires signup
 626                 not quite a usage policy, but seems ok
 627                 strange split of ipv4 and ipv6
 628                 seems dead?