Blacklists Compared

16 November 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
38880(total number of IP addresses tested, including 130 at SDSC)
33986(union of most IP zones)
27228l2.apews.org
26706b.barracudacentral.org
25266zen.spamhaus.org (union of all results)
23231zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
23231cbl.abuseat.org
18766spam.dnsbl.sorbs.net
17380hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
16155bl.tiopan.com
15847hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
15560zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
12163bl.mailspike.net (union of all results)
12107dnsbl-1.uceprotect.net
11966dnsbl.sorbs.net (union of all results)
11765all.spamrats.com (union of all results)
9430db.wpbl.info
9427ubl.unsubscore.com
9139dnsbl.inps.de
9048psbl.surriel.com
7870all.spamrats.com (result 127.0.0.36 = dialup)
6881bl.spameatingmonkey.net
6761dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6513dnsbl-2.uceprotect.net
6312truncate.gbudb.net
6187list.dnswl.org (not a blacklist!)
6144ips.backscatterer.org
5429wl.mailspike.net (union of all results) (not a blacklist!)
4676bl.spamcop.net
4664bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
4478bl.mailspike.net (result 127.0.0.11 = very bad reputation)
4473dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4356dnsbl-3.uceprotect.net
3570all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3391hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3241wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2785dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2609hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2578hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2320hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2299bl.mailspike.net (result 127.0.0.12 = bad reputation)
1987zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1595ix.dnsbl.manitu.net
1574zen.spamhaus.org (union of SBL and SBLCSS results)
1495bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1457wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1323bl.spamcannibal.org
1159bl.score.senderscore.com
917spamsources.fabel.dk
806mail-abuse.blacklist.jippg.org
806accredit.habeas.com (not a blacklist!)
791zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
783zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
758query.bondedsender.org (not a blacklist!)
640wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
615all.s5h.net
384korea.services.net
362all.spamrats.com (result 127.0.0.38 = spam source)
352tr.countries.nerd.dk
229free.v4bl.org
196iadb.isipp.com (not a blacklist!)
164hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
120iadb2.isipp.com (not a blacklist!)
98bl.mav.com.br
91wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
85dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
85dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
85dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
75tor.dnsbl.sectoor.de (union of all results)
71dnsbl.ahbl.org (union of all results)
70tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
54dnsbl.ahbl.org (result 127.0.0.4 = spam source)
17dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
10dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
5tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
4spamguard.leadmon.net (union of all results)
3dnsbl-0.uceprotect.net
3spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2multi.surbl.org
1wadb.isipp.com
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
38880(total number of IP addresses whose names were tested, including 130 at SDSC)
23038hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
18312hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7883l1.apews.org
3110hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2505hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2234(union of most domain zones)
905hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
728hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
668dbl.spamhaus.org (result 127.0.1.2 = spam source)
668dbl.spamhaus.org (union of all results)
323hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
195hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
101multi.surbl.org
86hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
47hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
47rhsbl.ahbl.org
31fresh.spameatingmonkey.net
28urired.spameatingmonkey.net
20dob.sibl.support-intelligence.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
20535(total number of domains tested, including 92 at SDSC)
17105hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3891hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3424(union of most domain zones)
2647dbl.spamhaus.org (result 127.0.1.2 = spam source)
2647dbl.spamhaus.org (union of all results)
2234hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2086hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1565hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1363hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1264multi.surbl.org
676fresh.spameatingmonkey.net
601dob.sibl.support-intelligence.net
531l1.apews.org
212hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
47urired.spameatingmonkey.net
43hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
36rhsbl.ahbl.org
27hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
11hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
3ex.dnsbl.org
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 17 November 2013.