Blacklists Compared

28 December 2013

[ 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
48186(total number of IP addresses tested, including 126 at SDSC)
44068(union of most IP zones)
39152b.barracudacentral.org
39029zen.spamhaus.org (union of all results)
38805l2.apews.org
36635cbl.abuseat.org
36632zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
33572spam.dnsbl.sorbs.net
32999hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
32707hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
31562dnsbl-1.uceprotect.net
29774bl.mailspike.net (union of all results)
28922ubl.unsubscore.com
28201psbl.surriel.com
26632bl.tiopan.com
26562db.wpbl.info
24640zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
23841dnsbl.sorbs.net (union of all results)
23047bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
18598truncate.gbudb.net
17289bl.spameatingmonkey.net
15713dnsbl.sorbs.net (result 127.0.0.6 = spam source)
15525dnsbl.inps.de
14008bl.spamcop.net
13916all.spamrats.com (union of all results)
13331dnsbl-2.uceprotect.net
11259dnsbl-3.uceprotect.net
9670bl.score.senderscore.com
9534all.spamrats.com (result 127.0.0.36 = dialup)
9156dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
8396dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6484ix.dnsbl.manitu.net
5660bl.mailspike.net (result 127.0.0.11 = very bad reputation)
5628ips.backscatterer.org
4630list.dnswl.org (not a blacklist!)
4397zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4210all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3915wl.mailspike.net (union of all results) (not a blacklist!)
2693hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2583hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2315wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2019bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1580hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1430hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1329spamsources.fabel.dk
1171bl.spamcannibal.org
1047wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1018zen.spamhaus.org (union of SBL and SBLCSS results)
971tr.countries.nerd.dk
935all.s5h.net
729accredit.habeas.com (not a blacklist!)
659zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
654query.bondedsender.org (not a blacklist!)
628bl.mailspike.net (result 127.0.0.12 = bad reputation)
597free.v4bl.org
471wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
454mail-abuse.blacklist.jippg.org
389korea.services.net
359zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
208all.spamrats.com (result 127.0.0.38 = spam source)
143dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
143dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
143dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
137iadb.isipp.com (not a blacklist!)
108hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
96iadb2.isipp.com (not a blacklist!)
82wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
52dnsbl.ahbl.org (union of all results)
39dnsbl.ahbl.org (result 127.0.0.4 = spam source)
20tor.dnsbl.sectoor.de (union of all results)
16tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
13dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
8bl.mav.com.br
5dnsbl-0.uceprotect.net
5spamguard.leadmon.net (union of all results)
4tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2multi.surbl.org
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
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
48186(total number of IP addresses whose names were tested, including 126 at SDSC)
29000hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
23132hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14390l1.apews.org
3886hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1915hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1672(union of most domain zones)
729hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
471hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
425dbl.spamhaus.org (result 127.0.1.2 = spam source)
425dbl.spamhaus.org (union of all results)
196hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
134hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
40hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
36multi.surbl.org
26rhsbl.ahbl.org
14hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
12fresh.spameatingmonkey.net
10urired.spameatingmonkey.net
2dob.sibl.support-intelligence.net
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
16355(total number of domains tested, including 90 at SDSC)
13550hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3592hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2321(union of most domain zones)
1697dbl.spamhaus.org (result 127.0.1.2 = spam source)
1697dbl.spamhaus.org (union of all results)
1364hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1010hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
967hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
961hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
840l1.apews.org
696multi.surbl.org
285fresh.spameatingmonkey.net
247dob.sibl.support-intelligence.net
189hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
32hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
21rhsbl.ahbl.org
19urired.spameatingmonkey.net
10hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
9hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
4ex.dnsbl.org
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 29 December 2013.