Blacklists Compared

22 August 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
138061(total number of IP addresses tested, including 201 at SDSC)
134148(union of most IP zones)
121197b.barracudacentral.org
118106zen.spamhaus.org (union of all results)
115221l2.apews.org
84301cbl.abuseat.org
83449zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
82974hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
79837dnsbl.sorbs.net (union of all results)
79379dnsbl-1.uceprotect.net
77692dnsbl-2.uceprotect.net
77234dnsbl-3.uceprotect.net
76231bl.spameatingmonkey.net
74838zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
60149ubl.unsubscore.com
59673psbl.surriel.com
58951dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
41718hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
33226no-more-funn.moensted.dk (union of all results)
31386dnsbl.sorbs.net (result 127.0.0.10 = dialup)
29540bl.spamcop.net
25095db.wpbl.info
22192no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
21951blackholes.five-ten-sg.com (union of all results)
20751zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
19342blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
15166ix.dnsbl.manitu.net
14694spam.dnsbl.sorbs.net
11369mail-abuse.blacklist.jippg.org
11101hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
9417no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
9201korea.services.net
8827dnsbl.inps.de
6908bl.spamcannibal.org
5956ips.backscatterer.org
5266tr.countries.nerd.dk
4022spamsources.fabel.dk
3975list.dnswl.org (not a blacklist!)
3154hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2155hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2142hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1974dnsbl.njabl.org (union of all results)
1878blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
1617dnsbl.njabl.org (result 127.0.0.9 = open proxy)
973aspews.ext.sorbs.net
780no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
754no-more-funn.moensted.dk (result 127.0.0.9 = misc)
711blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
480accredit.habeas.com (not a blacklist!)
410query.bondedsender.org (not a blacklist!)
331dnsbl.sorbs.net (result 127.0.0.6 = spam source)
302l2.bbfh.ext.sorbs.net
297dnsbl.njabl.org (result 127.0.0.4 = spam source)
219zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
212hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
180dnsbl.ahbl.org (union of all results)
163iadb2.isipp.com (not a blacklist!)
137no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
130dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
117iadb.isipp.com (not a blacklist!)
88tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
88tor.dnsbl.sectoor.de (union of all results)
60dnsbl.njabl.org (result 127.0.0.2 = open relay)
60bl.deadbeef.com
49dnsbl.ahbl.org (result 127.0.0.4 = spam source)
43dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
38dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
37l1.bbfh.ext.sorbs.net
14blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
11multi.uribl.com (result 127.0.0.2 = spam resource)
11multi.uribl.com (union of all results)
10zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
8dnsbl-0.uceprotect.net
8spamguard.leadmon.net (union of all results)
7hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
5spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
4multi.surbl.org
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
3blackholes.brainerd.net
3dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)

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
138061(total number of IP addresses whose names were tested, including 201 at SDSC)
84015hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
75588hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
67164(union of most domain zones)
58941l1.apews.org
52769abuse.rfc-ignorant.org
26072dynamic.rhs.mailpolice.com
21814whois.rfc-ignorant.org (union of all results)
13861whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
8253hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
7953whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3921webmail.rhs.mailpolice.com
3476hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1454urired.spameatingmonkey.net
810adv.rhs.mailpolice.com
789hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
788hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
732rhsbl.ahbl.org
231hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
216hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
142hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
108multi.uribl.com (result 127.0.0.2 = spam resource)
108multi.uribl.com (union of all results)
88rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
88rhsbl.sorbs.net (union of all results)
80multi.surbl.org
80postmaster.rfc-ignorant.org
53dsn.rfc-ignorant.org (zone not intended for this use)
52bogusmx.rfc-ignorant.org
41bulk.rhs.mailpolice.com
27hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
12fresh.spameatingmonkey.net
12dob.sibl.support-intelligence.net
5porn.rhs.mailpolice.com
2bl.deadbeef.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
73031(total number of domains tested, including 184 at SDSC)
63333hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
19116(union of most domain zones)
7859urired.spameatingmonkey.net
7677hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4384whois.rfc-ignorant.org (union of all results)
4347hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
4199abuse.rfc-ignorant.org
4039hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3645whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3099l1.apews.org
2253hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2014hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1324multi.uribl.com (union of all results)
1310multi.uribl.com (result 127.0.0.2 = spam resource)
1249multi.surbl.org
1247bogusmx.rfc-ignorant.org
1103postmaster.rfc-ignorant.org
913webmail.rhs.mailpolice.com
739whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
573dynamic.rhs.mailpolice.com
467hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
339dsn.rfc-ignorant.org
308adv.rhs.mailpolice.com
280porn.rhs.mailpolice.com
129hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
63bulk.rhs.mailpolice.com
63hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
49hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
29rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
29rhsbl.sorbs.net (union of all results)
24dob.sibl.support-intelligence.net
16fresh.spameatingmonkey.net
16rhsbl.ahbl.org
13multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
13ex.dnsbl.org
6fraud.rhs.mailpolice.com
2bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 27 August 2009.