Blacklists Compared

23 August 2014

[ 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
28512(total number of IP addresses tested, including 158 at SDSC)
25266(union of most IP zones)
17781b.barracudacentral.org
16251l2.apews.org
15266zen.spamhaus.org (union of all results)
14487hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
13365cbl.abuseat.org
13363zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
12692spam.dnsbl.sorbs.net
12518ubl.unsubscore.com
12221all.s5h.net
11835hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
10572dnsbl-1.uceprotect.net
9533zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
9322bl.tiopan.com
8065free.v4bl.org
7322all.spamrats.com (union of all results)
6558psbl.surriel.com
6251list.dnswl.org (not a blacklist!)
5910dnsbl.sorbs.net (union of all results)
5645dnsbl.inps.de
5575bl.mailspike.net (union of all results)
5393wl.mailspike.net (union of all results) (not a blacklist!)
5355dnsbl-2.uceprotect.net
4993db.wpbl.info
4761dnsbl-3.uceprotect.net
3963all.spamrats.com (result 127.0.0.36 = dialup)
3927bl.spameatingmonkey.net
3818truncate.gbudb.net
3569bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
3015hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2940all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
2833bl.spamcop.net
2789wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2691dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
2682hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2207dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2075dnsbl.sorbs.net (result 127.0.0.10 = dialup)
1920ips.backscatterer.org
1918hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1830ix.dnsbl.manitu.net
1385bl.spamcannibal.org
1378wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1249zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1238bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1181hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1094zen.spamhaus.org (union of SBL and SBLCSS results)
1061wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
885bl.score.senderscore.com
722zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
722bl.mailspike.net (result 127.0.0.11 = very bad reputation)
710spamsources.fabel.dk
695accredit.habeas.com (not a blacklist!)
621query.bondedsender.org (not a blacklist!)
468bl.mailspike.net (result 127.0.0.12 = bad reputation)
445all.spamrats.com (result 127.0.0.38 = spam source)
372zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
333korea.services.net
206mail-abuse.blacklist.jippg.org
200tr.countries.nerd.dk
169iadb.isipp.com (not a blacklist!)
165wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
143hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
91iadb2.isipp.com (not a blacklist!)
27dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
27dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
27dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
17tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
17tor.dnsbl.sectoor.de (union of all results)
11multi.uribl.com (union of all results)
10multi.uribl.com (result 127.0.0.2 = spam resource)
10dnsbl.sorbs.net (result 127.0.0.5 = open relay)
9dnsbl-0.uceprotect.net
3multi.surbl.org
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
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
28512(total number of IP addresses whose names were tested, including 158 at SDSC)
16710hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
13204hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4108l1.apews.org
2271hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2180hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1594(union of most domain zones)
800dbl.spamhaus.org (union of all results)
794dbl.spamhaus.org (result 127.0.1.2 = spam source)
684hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
414hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
378hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
117hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
79dob.sibl.support-intelligence.net
78fresh.spameatingmonkey.net
58hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
47multi.surbl.org
42multi.uribl.com (result 127.0.0.2 = spam resource)
42multi.uribl.com (union of all results)
38hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
21urired.spameatingmonkey.net
5dbl.spamhaus.org (result 127.0.1.102 = abused legitimate domain spam source)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1dbl.spamhaus.org (result 127.0.1.4 = phish domain)
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
21471(total number of domains tested, including 115 at SDSC)
13049hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3877(union of most domain zones)
3140hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2692dbl.spamhaus.org (union of all results)
2666dbl.spamhaus.org (result 127.0.1.2 = spam source)
2634hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2080multi.uribl.com (union of all results)
2069multi.uribl.com (result 127.0.0.2 = spam resource)
1985hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1856multi.surbl.org
1185hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1101hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
450fresh.spameatingmonkey.net
420dob.sibl.support-intelligence.net
414l1.apews.org
168hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
31hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
22urired.spameatingmonkey.net
20hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
20dbl.spamhaus.org (result 127.0.1.102 = abused legitimate domain spam source)
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
6hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
5ex.dnsbl.org
5dbl.spamhaus.org (result 127.0.1.4 = phish domain)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1dbl.spamhaus.org (result 127.0.1.103 = abused legitimate domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 24 August 2014.