Blacklists Compared

5 October 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
92600(total number of IP addresses tested, including 162 at SDSC)
87345(union of most IP zones)
78342zen.spamhaus.org (union of all results)
77579l2.apews.org
77504b.barracudacentral.org
71307cbl.abuseat.org
71304zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
67903bl.tiopan.com
56976hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
54326dnsbl-1.uceprotect.net
50147hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
50074zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
48538spam.dnsbl.sorbs.net
48173bl.mailspike.net (union of all results)
43167psbl.surriel.com
38632ubl.unsubscore.com
37358db.wpbl.info
33875dnsbl.sorbs.net (union of all results)
33192bl.spameatingmonkey.net
33057all.spamrats.com (union of all results)
31116bl.mailspike.net (result 127.0.0.12 = bad reputation)
30839dnsbl-3.uceprotect.net
30442dnsbl-2.uceprotect.net
27378dnsbl.inps.de
24085truncate.gbudb.net
22274all.spamrats.com (result 127.0.0.36 = dialup)
20642dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
16486bl.spamcop.net
16263dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10985ips.backscatterer.org
10964bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
10459all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
8285zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6417list.dnswl.org (not a blacklist!)
5843bl.score.senderscore.com
5633wl.mailspike.net (union of all results) (not a blacklist!)
5453bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
4844ix.dnsbl.manitu.net
4046all.s5h.net
3967bl.mailspike.net (result 127.0.0.11 = very bad reputation)
3398hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3341wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3320hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2737hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2297hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2139zen.spamhaus.org (union of SBL and SBLCSS results)
1725bl.spamcannibal.org
1575wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1514zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1471spamsources.fabel.dk
1280free.v4bl.org
1113tr.countries.nerd.dk
911dnsbl.sorbs.net (result 127.0.0.6 = spam source)
756accredit.habeas.com (not a blacklist!)
682wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
640query.bondedsender.org (not a blacklist!)
625zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
591mail-abuse.blacklist.jippg.org
582korea.services.net
430all.spamrats.com (result 127.0.0.38 = spam source)
210dnsbl.ahbl.org (union of all results)
184dnsbl.ahbl.org (result 127.0.0.4 = spam source)
178bl.mav.com.br
164iadb.isipp.com (not a blacklist!)
145dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
145dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
145dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
125hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
96iadb2.isipp.com (not a blacklist!)
74tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
74tor.dnsbl.sectoor.de (union of all results)
37wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
26dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
6dnsbl-0.uceprotect.net
4multi.surbl.org
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3wadb.isipp.com
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1spamguard.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
92600(total number of IP addresses whose names were tested, including 162 at SDSC)
54432hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
44222hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
29546l1.apews.org
7382hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3313(union of most domain zones)
2593hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1385dbl.spamhaus.org (result 127.0.1.2 = spam source)
1385dbl.spamhaus.org (union of all results)
1200hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1130hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
425hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
310hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
166multi.surbl.org
124fresh.spameatingmonkey.net
123hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
119dob.sibl.support-intelligence.net
47rhsbl.ahbl.org
22urired.spameatingmonkey.net
13hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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
17617(total number of domains tested, including 138 at SDSC)
13942hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3513(union of most domain zones)
3472hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2670dbl.spamhaus.org (union of all results)
2669dbl.spamhaus.org (result 127.0.1.2 = spam source)
2451hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1612hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1590hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1356multi.surbl.org
1337hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
456dob.sibl.support-intelligence.net
407fresh.spameatingmonkey.net
358l1.apews.org
203hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
105urired.spameatingmonkey.net
37rhsbl.ahbl.org
30hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
3ex.dnsbl.org
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 8 October 2013.