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 00_NEEDS_RECHECK
 196         https://antispam.imp.ch/
 197                 no usage policy
 198                 no return code info
 199                 no good listing policy
 200                 information received from inquiry to provider
 201                         website will be updated
 202                         return codes
 203                                 dnsrbl.swinog.ch and uribl.swinog.ch (holding time increases with hits)
 204                                         127.0.1.8 = default
 205                                         127.0.0.10 => TRAP (Email sent to a spamtrap)
 206                                         127.0.0.11 => REPO (Email reported as Spam by customer)
 207                                 spamrbl.imp.ch (3 days holding time)
 208                                         IPs are listed when trying to send mail to the spamtrap mailserver
 209                                         MD5 hash: attachment sent to the swinog blacklist
 210                                 wormrbl.imp.ch
 211                                         DEAD
 212         http://blacklist.woody.ch/rblcheck.php3
 213                 dead?
 214                 waiting for feedback
 215         http://dnsbl.iip.lu/
 216                 https://docs.hetrixtools.com/lookup-dnsbl-iip-lu-false-positive-removed/
 217                         in 2016: lookup.dnsbl.iip.lu blacklist started issuing false positive responses and upon further investigation looks to be abandoned/dead.
 218                 https://www.blalert.com/dnsbl/lookup.dnsbl.iip.lu
 219                         This blacklist is marked as "shut down" and non-operational as of 2017-12-31.
 220         http://dnsbl.inps.de/
 221                 timeout
 222                 https://www.dnsbl.com/search/label/dnsbl.inps.de
 223                         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.
 224                 https://docs.hetrixtools.com/dnsbl-inps-de-removed-from-our-system/
 225                         [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.
 226                 https://glockapps.com/blacklist/dnsbl-inps-de/
 227                         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.
 228                 https://www.dnsbl.info/dnsbl-details.php?dnsbl=dnsbl.inps.de
 229                         This blacklist is offline as of May 1, 2020.
 230                 https://web.archive.org/web/20220428013500/http://www.inps.de/
 231 00_NEEDS_RESEARCH
 232         bl.tiopan.com
 233         blocked.hilli.dk
 234         dialups.visi.com
 235         dnsbl.antispam.or.id
 236         dob.sibl.support-intelligence.net
 237         intruders.docs.uu.se
 238         map.spam-rbl.com
 239         rbl.triumf.ca
 240         all.s5h.net
 241                 http://www.usenix.org.uk/content/rbl.html
 242         torexit.dan.me.uk
 243         http://pedantic.org/
 244                 as of 20140701
 245         rbl.fasthosts.co.uk
 246                 https://help.fasthosts.co.uk/app/answers/detail/a_id/140/kw/rbl
 247                 seems dead?
 248                 https://antispam.fasthosts.co.uk/
 249 00_ALIVE
 250         00_RECONSIDER
 251                 http://barracudacentral.org/rbl
 252                         requires account with extensive information (more than spamhaus e.g.):
 253                                 your name.
 254                                 your company name.
 255                                 your phone number.
 256                                 your address.
 257                                 your city name.
 258                                 your state/province name.
 259                                 your zip/postal code.
 260                                 the name of the alternate contact.
 261                                 the phone number of the alternate contact.
 262                                 the email address of the alternate contact.
 263                         seems well documented
 264         00_E_EVIL
 265                 sbl.nszones.com
 266                         http://www.spamhaus.org/organization/statement/008/fake-dnsbl-uncovered-nszones.com
 267         00_E_INFORMATION
 268                 blacklist.sci.kun.nl
 269                         https://cncz.science.ru.nl/en/howto/email-spam/
 270                         not really its own DNSBL?
 271                         no usage information
 272                         no usage policy
 273                 http://anonmails.de/
 274                         seems serious but missing necessary info
 275                                 usage policy
 276                                 listing policy
 277                 http://blacklist.jippg.org/
 278                         no usage policy
 279                         no listing policy
 280                         no return code info
 281                 bip.virusfree.cz
 282                         used by rspamd
 283                         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
 284                 https://www.nixspam.net/
 285                         previously http://www.dnsbl.manitu.net/
 286                         query zone: ix.dnsbl.manitu.net
 287                         provided by the reputable german publisher 'heise' which makes the high quality c’t, iX, and telepolis magacines
 288                         difficult to find info regarding listing policy
 289                         asked for more information to be added
 290                                 https://www.heise.de/forum/iX/Kommentare/Gemeinsam-stark/Nutzungsbedingungen-Return-Codes-sonstige-Infos/posting-42669177/show/
 291                 access.redhawk.org
 292                         website works but barely any info, not even how to query it
 293                         https://www.redhawk.org/?p=64
 294                         https://www.redhawk.org/SpamHawk/index.php
 295                 https://senderscore.org/
 296                         requires registration?
 297                         Scam? http://www.complaintsboard.com/complaints/buyer-beware-senderscoreorg-is-a-scam-c276871.html
 298                         https://senderscore.org/assess/blocklist-lookup/
 299                         FAQ: https://knowledge.validity.com/hc/en-us/articles/360006992592-Return-Path-Blocklist-RPBL-FAQ-
 300                         no information how to query found
 301                 mail-abuse.org
 302                         https://ers.trendmicro.com/
 303                         trendmicro paid service
 304                         https://docs.trendmicro.com/en-us/enterprise/email-reputation-services-online-help/getting-started_001/configuring-email-re/creating-an-account.aspx
 305                                 »If you don’t create an account, you can still query the reputation of an IP address«
 306                         I don’t find any pricing or usage information
 307                 http://dnsbl.tornevall.org/
 308                         https://www.tornevall.net/
 309                         related to https://www.fraudbl.org/
 310                         seems a bit unstructured and not very well documented
 311                                 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
 312                         seems active
 313                 http://rbl.schulte.org/
 314                         seems active
 315                         listing policy seems to be: they received spam from an IP
 316                         usage policy: Anyone can use this RBL list [sic]
 317                         return codes: probably boolean, i.e. either listed or not
 318                 http://relaytest.kundenserver.de/
 319                         by 1und1 (now ionos?), used internally
 320                         https://www.blalert.com/dnsbl/relays.bl.kundenserver.de
 321                         no usage policy found
 322                         no listing policy found
 323                         no return code explanation found
 324         00_E_PAID
 325         00_E_PRIVATE
 326                 88.blacklist.zap
 327                         http://blogs.technet.com/b/fss/archive/2009/05/08/forefront-dnsbl-yeah-or-nay.aspx
 328                         https://web.archive.org/web/20150812003556/http://blogs.technet.com/b/fss/archive/2009/05/08/forefront-dnsbl-yeah-or-nay.aspx
 329                         https://www.blalert.com/dnsbl/88.blacklist.zap
 330                                 88.blacklist.zap is an internal blacklist maintained by Microsoft's Forefront
 331                         https://www.dnsbl.com/search/label/frontbridge
 332                 http://drmx.org/
 333                         »Use of any DrMX.ORG DNS Zone is by request and by contract only.«
 334                 rbl.tdk.net
 335                         tdk.net seems dead on http(s)
 336                         private
 337                                 https://www.blalert.com/dnsbl/rbl.tdk.net
 338                         old link: http://postmaster.tdc.dk/publish.php?id=31787
 339                                 tdc.dk redirects to yousee.dk
 340                                 https://web.archive.org/web/20170703084224/http://postmaster.tdc.dk/publish.php?id=31787
 341                 rbl.zenon.net
 342                         private
 343                                 https://www.blalert.com/dnsbl/rbl.zenon.net
 344                         http://www.noc.zenon.net/rbl/
 345                         russian(?)
 346                 https://ahbl.org/
 347                         was public until 2015
 348                         now private, invite-only
 349         http://rfc-clueless.org/
 350                 lists domains
 351                         that do not adhere to common best practices or requirements
 352                 does NOT list spammers!
 353                 listing criteria are explained well
 354                         http://rfc-clueless.org/pages/listing_policy
 355                 return codes are explained
 356                         http://rfc-clueless.org/
 357                 usage policy is not so clear but the FAQ implies that it’s just free to use for everyone
 358                 many timeouts
 359                         first noticed in 2014 and deactivated
 360                         retried in 2023 and still the case
 361         http://spameatingmonkey.com/
 362                 lists IPs
 363                         that sent backscatter
 364                         that sent to spamtrap
 365                         added by policy
 366                                 this includes dial-up!
 367                                 https://spameatingmonkey.com/faq/policy-based-listing
 368                 lists domains/URIs
 369                         by age
 370                         in spam bodies
 371                 usage policy seems clear
 372                         https://spameatingmonkey.com/faq/query-limits
 373                 listing policy seems clear
 374                         https://spameatingmonkey.com/services
 375                 return codes documented
 376                         https://spameatingmonkey.com/services
 377                 http://blogspambl.com/
 378                         redirects to spameatingmonkey.com
 379         http://uribl.com/
 380                 lists domains/URIs
 381                         that appear in spam bodies
 382                         has whitelist
 383                 lists IPs
 384                         that URIs in spam bodies resolve to
 385                 return codes are documented
 386                         https://uribl.com/about.shtml#implementation
 387                         bitmasked
 388                         127.0.0.1 is used to signal abusive query behaviour
 389         http://wiki.junkemailfilter.com/index.php/Spam_DNS_Lists
 390                 called "hostkarma"
 391                 lists domains/URIs
 392                 lists IPs
 393                 usage policy is relatively clear that it’s free, except maybe for big for-profit oranizations
 394                 listing policy is documented
 395                 return codes are documented
 396                 seems very trustworthy
 397         http://www.sorbs.net/
 398                 good reputation
 399                 lists domains/URIs
 400                 lists IPs
 401                 usage policy is clear that it’s free
 402                 listing policy is documented
 403                 return codes are documented
 404                 seems trustworthy
 405         http://www.spamhaus.org/
 406                 good reputation
 407                 very well done
 408                 seems very professional
 409                 lists domains/URIs
 410                 lists IPs
 411                 usage policy is clear
 412                         https://www.spamhaus.org/organization/dnsblusage/
 413                 listing policies are clearly documented
 414                 return codes are clearly documented
 415         http://www.surbl.org/
 416                 good reputation
 417                 lists domains/URIs
 418                 usage policy is clear
 419                         https://surbl.org/usage-policy
 420                 listing policy is documented
 421                 return codes are documented
 422                         bitmasked
 423                         127.0.0.1 means blocked
 424         http://zapbl.net/
 425                 lists domains/URIs
 426                 lists IPs
 427                 listing policy seems clear
 428                         https://zapbl.net/policy
 429                 usage policy seems clearly free for everyone
 430                         https://zapbl.net/using
 431                 return codes are documented
 432                 seems well done
 433         https://rbl.foobar.hu/
 434                 lists domains/URIs
 435                 lists IPs
 436                 listing policy seems clear
 437                 usage policy seems clearly free for everyone
 438                 return codes are documented
 439                 possibly unmaintained or dead
 440                         footer says: ©2013-14
 441         http://apews.org/?page=filter
 442                 questionable
 443                         https://www.dnsbl.com/search/label/apews
 444                         https://whatismyipaddress.com/apews
 445                 dead?
 446                         no news on http://apews-user.blogspot.com/ since 2014
 447                 not further looked into because of the above
 448         https://www.dnswl.org/
 449                 seems to be run with best intentions but has had issues from what I have heard from some users
 450                 IRC channel has some activity
 451                 usage policy relatively clear
 452                         free within certain limits
 453                 listing policy
 454                         self-service
 455                 return codes are documented
 456         00_E_FOCUS
 457                 https://www.dnsblchile.org/index.en.html
 458                         chilenian spam so not interesting for me
 459                         seems alive
 460         00_LISTS_BLOGSPAMMERS
 461                 https://www.madavi.de/madavibl/
 462                         »This blacklist should only be used to block comment spammer (on blogs and websites). Don’t use it for mail.«
 463                 http://bsb.empty.us/
 464                         does not exist anymore
 465                         empty.us returns »Nothing here, obviously.«
 466         00_LISTS_COUNTRIES
 467                 korea
 468                         http://korea.services.net/
 469         00_LISTS_DIALUPS
 470         00_LISTS_OPENRESOLVERS
 471         00_LISTS_TORNODES
 472                 https://www.dan.me.uk/dnsbl
 473         https://0spam.org/
 474                 clear information on usage policy
 475                         Nothing. The 0Spam Project is absolutely free for email providers, IT professionals and general removal request.
 476                         DNSBL service and removals are 100% for free for all uses; commercial, non profit and personal.
 477                 seems serious
 478                 listing policies are a little less clear
 479                         bl.0spam.org DNSBL | 0spam Spam Trap Primary Database
 480                         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.
 481                         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.
 482                 return codes not very clear
 483         https://abuse.ro/
 484                 policy
 485                         spamtraps
 486                         The last IP address before destination in the email headers is listed into rbl.abuse.ro list.
 487                         Sender domains are analyzed and if confirmed to be not spoofed, are listed into dbl.abuse.ro list
 488                         Spamvertized domains (including those indirectly linked through services like bit.ly) are listed into uribl.abuse.ro list
 489         http://dronebl.org/
 490                 usage policy is clear: free for whatever
 491                 listing policy is not quite so clear
 492                         can be mostly inferred from the classes but not entirely clear IMHO
 493                 has an IRC channel
 494                 return codes
 495                         not explicitly mentioned but it’s 127.0.0.X where X is the class from https://dronebl.org/classes
 496         http://psbl.org/
 497                 query zone: psbl.surriel.com
 498                 no usage policy, but seems implied that usage is free
 499                 listing policy
 500                         no explicit, complete policy given but sending to spamtraps is mentioned to get you listed and seems the exclusive mechanism
 501                 return codes
 502                         not documented, probably only boolean
 503         http://rbldata.interserver.net/
 504                 listing policy more or less clear
 505                 usage policy not given but since usage is explained it’s probably free for all
 506                 return codes seem to be binary, i.e. either listed or not
 507                 lists IPs
 508                 lists domains/URIs
 509         http://rv-soft.info/
 510                 usage policy not explicit but seems to be free
 511                 listing policy also not explicit but can be inferred from return code explanation
 512                 return codes are explained
 513         http://spamrats.com/
 514         http://spamstinks.com/
 515         http://st.technovision.dk/
 516         http://tor.efnet.org/
 517                 http://rbl.efnetrbl.org/ MIRROR
 518         http://v4bl.org/
 519         http://virbl.bit.nl/
 520         http://wpbl.info/
 521         http://www.aupads.org/
 522         http://www.backscatterer.org/
 523                 fragwuerdige policy - bezahlen fuer schnelleres delisting
 524         http://www.blockedservers.com/
 525         http://www.blocklist.de/en/index.html
 526         http://www.emailbasura.org/cgi-bin/emailbasura-ini.pl?lang=eng
 527         http://www.gbudb.com/truncate/
 528         http://www.justspam.org/
 529         http://www.kempt.net/dnsbl/
 530         http://www.leadmon.net/spamguard/
 531         http://www.spamcop.net/
 532                 good policy
 533                 good reputation
 534         http://www.spamsources.fabel.dk/
 535                 sensible policy
 536         http://www.srntools.com/blacklist/
 537         http://www.uceprotect.net/en/index.php
 538         https://bl.konstant.no/
 539         https://choon.net/rbl.php
 540         https://www.abuse.ch/
 541                 https://www.abuse.ch/?tag=httpbl
 542         https://www.kisarbl.or.kr/
 543         https://www.megarbl.net/
 544         https://www.team-cymru.org/Services/Bogons/dns.html
 545         http://mailspike.net/usage.html
 546                 reputation-based
 547         http://www.whitelisted.org/
 548                 paid subscription
 549                 policy on site
 550         https://puck.nether.net/or/
 551                 policies on website
 552         http://www.isipp.com/email-accreditation/iadb-query-instruction/
 553                 requires signup
 554                 not quite a usage policy, but seems ok
 555                 strange split of ipv4 and ipv6
 556                 seems dead?