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