Blacklists Compared

17 December 2011

[ Fighting Spam | Dialup Zones | Blacklists Compared | Current Blacklist Comparison | Sendmail Configuration ]

Survey results for all known public IP-based DNS blacklists. Lookups were done on connecting IP addresses. The "union of most IP zones" line excludes the hostkarma.junkemailfilter.com (all results but 127.0.0.2, 127.0.0.3, and 127.0.0.4), exemptions.ahbl.org, query.bondedsender.org, list.dnswl.org, accredit.habeas.com, iadb.isipp.com, iadb2.isipp.com, swl.spamhaus.org, and wl.mailspike.net zones because they are not blacklists. Because they are too aggressive to be widely useful the spam.dnsbl.sorbs.net and l2.apews.org zones are also excluded from the union.

HitsDNS Zone
47520(total number of IP addresses tested, including 164 at SDSC)
44660(union of most IP zones)
35359l2.apews.org
34987b.barracudacentral.org
33852zen.spamhaus.org (union of all results)
32150cbl.abuseat.org
32149zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
25345ip.v4bl.org
24332spam.dnsbl.sorbs.net
23304hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
22781bl.tiopan.com
21717zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
20167dnsbl-1.uceprotect.net
20030dnsbl.sorbs.net (union of all results)
17199dnsbl-3.uceprotect.net
16856dnsbl-2.uceprotect.net
16703bl.mailspike.net (union of all results)
16110truncate.gbudb.net
15072hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14297bl.spameatingmonkey.net
13836blackholes.five-ten-sg.com (union of all results)
11709dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
8941bl.mailspike.net (result 127.0.0.11 = very bad reputation)
8875ubl.unsubscore.com
8767ix.dnsbl.manitu.net
7951psbl.surriel.com
7718dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6646bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
6552list.dnswl.org (not a blacklist!)
6407blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
5709blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
5584bl.spamcop.net
5536dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5526hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5236db.wpbl.info
4592zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4072wl.mailspike.net (union of all results) (not a blacklist!)
4027no-more-funn.moensted.dk (union of all results)
3166bl.score.senderscore.com
3058hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
3051dnsbl.inps.de
2793bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
2770ips.backscatterer.org
2664hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2612wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2106no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1775hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1718no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1712blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1453wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1240korea.services.net
1115bl.spamcannibal.org
1006spamsources.fabel.dk
858mail-abuse.blacklist.jippg.org
688accredit.habeas.com (not a blacklist!)
632query.bondedsender.org (not a blacklist!)
531l2.bbfh.ext.sorbs.net
518l1.bbfh.ext.sorbs.net
464zen.spamhaus.org (union of SBL and SBLCSS results)
357dnsbl.njabl.org (union of all results)
316zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
297dnsbl.njabl.org (result 127.0.0.9 = open proxy)
271aspews.ext.sorbs.net
251tr.countries.nerd.dk
212hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
205iadb.isipp.com (not a blacklist!)
190dnsbl.ahbl.org (union of all results)
148zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
116no-more-funn.moensted.dk (result 127.0.0.9 = misc)
114iadb2.isipp.com (not a blacklist!)
95dnsbl.ahbl.org (result 127.0.0.4 = spam source)
64dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
63dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
63dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
63dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
55no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
41no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
38dnsbl.njabl.org (result 127.0.0.2 = open relay)
31dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
28tor.dnsbl.sectoor.de (union of all results)
27tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
25spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
25spamguard.leadmon.net (union of all results)
22dnsbl.njabl.org (result 127.0.0.4 = spam source)
16swl.spamhaus.org (union of all results) (not a blacklist!)
14hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
9dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
7swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
7multi.surbl.org
7wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
7blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
6swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
5bl.deadbeef.com
4dnsbl-0.uceprotect.net
3swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2multi.uribl.com (union of all results)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
47520(total number of IP addresses whose names were tested, including 164 at SDSC)
26362hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
21418hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16601(union of most domain zones)
13396abuse.rfc-ignorant.org
11030l1.apews.org
6180whois.rfc-ignorant.org (union of all results)
5207whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3694hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2738hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
973whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
415hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
349dbl.spamhaus.org (result 127.0.1.2 = spam source)
349dbl.spamhaus.org (union of all results)
276hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
223hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
219hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
191urired.spameatingmonkey.net
121hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
34postmaster.rfc-ignorant.org
33bogusmx.rfc-ignorant.org
26rhsbl.ahbl.org
25fresh.spameatingmonkey.net
22multi.surbl.org
15multi.uribl.com (result 127.0.0.2 = spam resource)
15multi.uribl.com (union of all results)
12dob.sibl.support-intelligence.net
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
4dsn.rfc-ignorant.org (zone not intended for this use)
1bl.deadbeef.com
Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
18570(total number of domains tested, including 129 at SDSC)
15888hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4861(union of most domain zones)
3851hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2020hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1958hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1863whois.rfc-ignorant.org (union of all results)
1740whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1392abuse.rfc-ignorant.org
698postmaster.rfc-ignorant.org
676dbl.spamhaus.org (result 127.0.1.2 = spam source)
676dbl.spamhaus.org (union of all results)
615hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
597l1.apews.org
595hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
447multi.surbl.org
446urired.spameatingmonkey.net
407multi.uribl.com (union of all results)
403bogusmx.rfc-ignorant.org
396multi.uribl.com (result 127.0.0.2 = spam resource)
309hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
264dsn.rfc-ignorant.org
123whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
96fresh.spameatingmonkey.net
39dob.sibl.support-intelligence.net
17rhsbl.ahbl.org
15hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
14hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
13ex.dnsbl.org
12hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 19 December 2011.