Blacklists Compared

21 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
37200(total number of IP addresses tested, including 143 at SDSC)
31667(union of most IP zones)
25808l2.apews.org
24443zen.spamhaus.org (union of all results)
24303b.barracudacentral.org
21366spam.dnsbl.sorbs.net
21255zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
21254cbl.abuseat.org
19675hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
15957hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
15682bl.mailspike.net (union of all results)
15020zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
14639dnsbl-1.uceprotect.net
14205bl.tiopan.com
14195db.wpbl.info
13697ubl.unsubscore.com
13089psbl.surriel.com
12701bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
11751dnsbl.sorbs.net (union of all results)
9818dnsbl.inps.de
8843all.spamrats.com (union of all results)
7747bl.spameatingmonkey.net
6958ips.backscatterer.org
6829dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6728dnsbl-2.uceprotect.net
6288list.dnswl.org (not a blacklist!)
5819all.spamrats.com (result 127.0.0.36 = dialup)
5512wl.mailspike.net (union of all results) (not a blacklist!)
5037truncate.gbudb.net
4498dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3974dnsbl-3.uceprotect.net
3529bl.spamcop.net
3472hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3273wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2853hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2788all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
2762dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2363hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2280bl.score.senderscore.com
2245zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2123hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1785bl.mailspike.net (result 127.0.0.11 = very bad reputation)
1505wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1467ix.dnsbl.manitu.net
1235zen.spamhaus.org (union of SBL and SBLCSS results)
1224bl.spamcannibal.org
1186bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
954spamsources.fabel.dk
828accredit.habeas.com (not a blacklist!)
776bl.mailspike.net (result 127.0.0.12 = bad reputation)
749query.bondedsender.org (not a blacklist!)
707all.s5h.net
637wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
627zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
608zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
508tr.countries.nerd.dk
472mail-abuse.blacklist.jippg.org
298korea.services.net
284free.v4bl.org
257all.spamrats.com (result 127.0.0.38 = spam source)
205iadb.isipp.com (not a blacklist!)
132dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
132dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
132dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
126iadb2.isipp.com (not a blacklist!)
123hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
97wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
51dnsbl.ahbl.org (union of all results)
42dnsbl.ahbl.org (result 127.0.0.4 = spam source)
38bl.mav.com.br
28tor.dnsbl.sectoor.de (union of all results)
24tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
9dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
6dnsbl-0.uceprotect.net
5dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2multi.surbl.org
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (union of all results)
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
37200(total number of IP addresses whose names were tested, including 143 at SDSC)
22935hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
19120hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
8298l1.apews.org
2901hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2553hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1644(union of most domain zones)
818dbl.spamhaus.org (result 127.0.1.2 = spam source)
818dbl.spamhaus.org (union of all results)
670hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
263hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
254hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
160hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
98hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
55multi.surbl.org
55fresh.spameatingmonkey.net
34dob.sibl.support-intelligence.net
31rhsbl.ahbl.org
29hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
27urired.spameatingmonkey.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
18225(total number of domains tested, including 103 at SDSC)
14690hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4139hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2988(union of most domain zones)
2178dbl.spamhaus.org (union of all results)
2177dbl.spamhaus.org (result 127.0.1.2 = spam source)
1968hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1859hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1426hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1160hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
914multi.surbl.org
693fresh.spameatingmonkey.net
656dob.sibl.support-intelligence.net
611l1.apews.org
175hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
52urired.spameatingmonkey.net
36hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
28rhsbl.ahbl.org
19hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
11hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
4ex.dnsbl.org
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 22 December 2013.