Blacklists Compared

17 October 2009

[ 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, and iadb2.isipp.com zones because they are not blacklists. Because it is too aggressive to be widely useful the l2.apews.org zone is also excluded from the union.

HitsDNS Zone
166717(total number of IP addresses tested, including 186 at SDSC)
162989(union of most IP zones)
151041zen.spamhaus.org (union of all results)
142206l2.apews.org
134691bl.spameatingmonkey.net
132968b.barracudacentral.org
118855cbl.abuseat.org
118771zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
109442hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
105765dnsbl-1.uceprotect.net
101535dnsbl-2.uceprotect.net
101192dnsbl.sorbs.net (union of all results)
100354dnsbl-3.uceprotect.net
98874zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
92381psbl.surriel.com
74349dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
73078ubl.unsubscore.com
55540hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
41914blackholes.five-ten-sg.com (union of all results)
39921no-more-funn.moensted.dk (union of all results)
39752dnsbl.sorbs.net (result 127.0.0.10 = dialup)
38663blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
37781db.wpbl.info
35556bl.spamcop.net
27428no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
22863zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
20272ix.dnsbl.manitu.net
18621spam.dnsbl.sorbs.net
14815mail-abuse.blacklist.jippg.org
11593dnsbl.inps.de
9978no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
9939bl.spamcannibal.org
8818hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8722korea.services.net
4774spamsources.fabel.dk
3694list.dnswl.org (not a blacklist!)
3270ips.backscatterer.org
2762hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2521dnsbl.njabl.org (union of all results)
2402blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2207tr.countries.nerd.dk
2023dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1930hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1525no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1357hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
973no-more-funn.moensted.dk (result 127.0.0.9 = misc)
862zen.spamhaus.org (union of SBL and SBLCSS results)
840blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
553aspews.ext.sorbs.net
544dnsbl.sorbs.net (result 127.0.0.6 = spam source)
506zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
488accredit.habeas.com (not a blacklist!)
421l2.bbfh.ext.sorbs.net
388query.bondedsender.org (not a blacklist!)
356zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
319dnsbl.njabl.org (result 127.0.0.4 = spam source)
258l1.bbfh.ext.sorbs.net
179dnsbl.njabl.org (result 127.0.0.2 = open relay)
159iadb2.isipp.com (not a blacklist!)
157dnsbl.ahbl.org (union of all results)
128dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
120tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
120tor.dnsbl.sectoor.de (union of all results)
118iadb.isipp.com (not a blacklist!)
114no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
96hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
50bl.deadbeef.com
42dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
42dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
32dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
29dnsbl.ahbl.org (result 127.0.0.4 = spam source)
18zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
15multi.uribl.com (result 127.0.0.2 = spam resource)
15multi.uribl.com (union of all results)
8dnsbl-0.uceprotect.net
7blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
5multi.surbl.org
5spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
5spamguard.leadmon.net (union of all results)
4hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
2dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1blackholes.brainerd.net

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
166717(total number of IP addresses whose names were tested, including 186 at SDSC)
101607hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
90060hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
84902(union of most domain zones)
74422l1.apews.org
68611abuse.rfc-ignorant.org
34849dynamic.rhs.mailpolice.com
27177whois.rfc-ignorant.org (union of all results)
19172whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
10246hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
8005whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3953webmail.rhs.mailpolice.com
2918hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1075urired.spameatingmonkey.net
762adv.rhs.mailpolice.com
736hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
704hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
364hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
249bl.deadbeef.com
220hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
152hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
125rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
125rhsbl.sorbs.net (union of all results)
82multi.uribl.com (result 127.0.0.2 = spam resource)
82multi.uribl.com (union of all results)
71multi.surbl.org
57postmaster.rfc-ignorant.org
35bogusmx.rfc-ignorant.org
30dsn.rfc-ignorant.org (zone not intended for this use)
26fresh.spameatingmonkey.net
26bulk.rhs.mailpolice.com
23dob.sibl.support-intelligence.net
20hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
20rhsbl.ahbl.org
6porn.rhs.mailpolice.com

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
69322(total number of domains tested, including 174 at SDSC)
64822hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
17110(union of most domain zones)
8728hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6580whois.rfc-ignorant.org (union of all results)
6077whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5696hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4937abuse.rfc-ignorant.org
3061urired.spameatingmonkey.net
2796l1.apews.org
2759hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1831hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1435postmaster.rfc-ignorant.org
1308multi.surbl.org
1275bogusmx.rfc-ignorant.org
1148multi.uribl.com (union of all results)
1129multi.uribl.com (result 127.0.0.2 = spam resource)
1063hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
935webmail.rhs.mailpolice.com
513hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
503whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
482dsn.rfc-ignorant.org
426dynamic.rhs.mailpolice.com
326adv.rhs.mailpolice.com
197porn.rhs.mailpolice.com
80bulk.rhs.mailpolice.com
49hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
43hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
40hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
33rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
33rhsbl.sorbs.net (union of all results)
26fresh.spameatingmonkey.net
18ex.dnsbl.org
15rhsbl.ahbl.org
13dob.sibl.support-intelligence.net
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
7multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2fraud.rhs.mailpolice.com
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2bl.deadbeef.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 22 October 2009.