Blacklists Compared

28 September 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
91889(total number of IP addresses tested, including 139 at SDSC)
86899(union of most IP zones)
78378b.barracudacentral.org
77390zen.spamhaus.org (union of all results)
75556l2.apews.org
71019cbl.abuseat.org
71013zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
67800bl.tiopan.com
58531hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
56948dnsbl-1.uceprotect.net
53369spam.dnsbl.sorbs.net
52430hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
49702zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
48659bl.mailspike.net (union of all results)
47161psbl.surriel.com
42008db.wpbl.info
38100dnsbl.sorbs.net (union of all results)
33254bl.spameatingmonkey.net
32532all.spamrats.com (union of all results)
32243bl.mailspike.net (result 127.0.0.12 = bad reputation)
30554dnsbl-2.uceprotect.net
29375dnsbl-3.uceprotect.net
27918dnsbl.inps.de
22995ubl.unsubscore.com
22778truncate.gbudb.net
22079all.spamrats.com (result 127.0.0.36 = dialup)
21240dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
16610dnsbl.sorbs.net (result 127.0.0.10 = dialup)
12744bl.spamcop.net
11657dnsbl.sorbs.net (result 127.0.0.6 = spam source)
10462ips.backscatterer.org
10101all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
9563ix.dnsbl.manitu.net
9465bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
8165zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
7347bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
6285list.dnswl.org (not a blacklist!)
5518wl.mailspike.net (union of all results) (not a blacklist!)
4908bl.score.senderscore.com
4174all.s5h.net
4164bl.mailspike.net (result 127.0.0.11 = very bad reputation)
3519hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3415hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3372wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3335hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2770hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1822bl.spamcannibal.org
1760spamsources.fabel.dk
1618zen.spamhaus.org (union of SBL and SBLCSS results)
1601free.v4bl.org
1582wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1140tr.countries.nerd.dk
876zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
770accredit.habeas.com (not a blacklist!)
742zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
648query.bondedsender.org (not a blacklist!)
638mail-abuse.blacklist.jippg.org
556korea.services.net
531wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
462all.spamrats.com (result 127.0.0.38 = spam source)
277dnsbl.ahbl.org (union of all results)
252dnsbl.ahbl.org (result 127.0.0.4 = spam source)
234bl.mav.com.br
165iadb.isipp.com (not a blacklist!)
152hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
149dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
149dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
149dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
103iadb2.isipp.com (not a blacklist!)
85tor.dnsbl.sectoor.de (union of all results)
84tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
40wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
25dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
9dnsbl-0.uceprotect.net
8dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4wadb.isipp.com
2multi.surbl.org
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.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)
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
91889(total number of IP addresses whose names were tested, including 139 at SDSC)
53907hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
43242hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
29040l1.apews.org
7203hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3331(union of most domain zones)
2600hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1391dbl.spamhaus.org (result 127.0.1.2 = spam source)
1391dbl.spamhaus.org (union of all results)
1284hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1072hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
311hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
272hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
161hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
151multi.surbl.org
75fresh.spameatingmonkey.net
69dob.sibl.support-intelligence.net
66rhsbl.ahbl.org
20urired.spameatingmonkey.net
14hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
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
23708(total number of domains tested, including 106 at SDSC)
18004hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4756(union of most domain zones)
4671hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3498hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2650dbl.spamhaus.org (union of all results)
2648dbl.spamhaus.org (result 127.0.1.2 = spam source)
1759hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1512hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1358hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1078multi.surbl.org
973l1.apews.org
757fresh.spameatingmonkey.net
728dob.sibl.support-intelligence.net
204hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
64urired.spameatingmonkey.net
54hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
42rhsbl.ahbl.org
16hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
10hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
5ex.dnsbl.org
4hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 1 October 2013.