Blacklists Compared

29 June 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
67378(total number of IP addresses tested, including 145 at SDSC)
62362(union of most IP zones)
54555l2.apews.org
53995zen.spamhaus.org (union of all results)
53809b.barracudacentral.org
49033cbl.abuseat.org
49026zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
44858bl.tiopan.com
39367spam.dnsbl.sorbs.net
37028zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
36548bl.mailspike.net (union of all results)
35351hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
31790dnsbl-1.uceprotect.net
30719psbl.surriel.com
28163hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
26582db.wpbl.info
26478dnsbl.sorbs.net (union of all results)
23792bl.spameatingmonkey.net
22599bl.mailspike.net (result 127.0.0.12 = bad reputation)
21273truncate.gbudb.net
21046all.spamrats.com (union of all results)
20469dnsbl-2.uceprotect.net
20284dnsbl.inps.de
20078dnsbl-3.uceprotect.net
16840ubl.unsubscore.com
15233dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
13448all.spamrats.com (result 127.0.0.36 = dialup)
11279dnsbl.sorbs.net (result 127.0.0.10 = dialup)
9821ips.backscatterer.org
9456bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
7369all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
7245dnsbl.sorbs.net (result 127.0.0.6 = spam source)
6485bl.mav.com.br
6239wl.mailspike.net (union of all results) (not a blacklist!)
6180list.dnswl.org (not a blacklist!)
5347zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4009bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
3933wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3755hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3349bl.mailspike.net (result 127.0.0.11 = very bad reputation)
3096hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2724bl.spamcop.net
2589hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2573bl.score.senderscore.com
1607ix.dnsbl.manitu.net
1592wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1523bl.spamcannibal.org
1490hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1438spamsources.fabel.dk
1318tr.countries.nerd.dk
1209zen.spamhaus.org (union of SBL and SBLCSS results)
737zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
734accredit.habeas.com (not a blacklist!)
641wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
598query.bondedsender.org (not a blacklist!)
507hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
472zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
450free.v4bl.org
418korea.services.net
383mail-abuse.blacklist.jippg.org
343all.s5h.net
291all.spamrats.com (result 127.0.0.38 = spam source)
192iadb.isipp.com (not a blacklist!)
133l2.bbfh.ext.sorbs.net
106dnsbl.ahbl.org (union of all results)
83iadb2.isipp.com (not a blacklist!)
77dnsbl.ahbl.org (result 127.0.0.4 = spam source)
73wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
44dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
44dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
44dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
36tor.dnsbl.sectoor.de (union of all results)
34tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
17dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
12dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
9dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4wadb.isipp.com
3multi.surbl.org
3hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3spamguard.leadmon.net (union of all results)
2dnsbl-0.uceprotect.net
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
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
67378(total number of IP addresses whose names were tested, including 145 at SDSC)
38421hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
29013hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
19176l1.apews.org
5646hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2573(union of most domain zones)
2452hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
938hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
897hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
833dbl.spamhaus.org (result 127.0.1.2 = spam source)
833dbl.spamhaus.org (union of all results)
310hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
236hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
134hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
101multi.surbl.org
63multi.uribl.com (result 127.0.0.2 = spam resource)
63multi.uribl.com (union of all results)
57fresh.spameatingmonkey.net
41dob.sibl.support-intelligence.net
39rhsbl.ahbl.org
23urired.spameatingmonkey.net
20hostkarma.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
57837(total number of domains tested, including 107 at SDSC)
47839hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3440hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2751(union of most domain zones)
1800hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1708dbl.spamhaus.org (union of all results)
1705dbl.spamhaus.org (result 127.0.1.2 = spam source)
1516hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1433hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1222multi.surbl.org
1044multi.uribl.com (union of all results)
1026multi.uribl.com (result 127.0.0.2 = spam resource)
880hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
413l1.apews.org
397dob.sibl.support-intelligence.net
394fresh.spameatingmonkey.net
247hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
124urired.spameatingmonkey.net
40hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
28rhsbl.ahbl.org
15multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
13hostkarma.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
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
3dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 1 July 2013.