Blacklists Compared

20 February 2010

[ 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
209262(total number of IP addresses tested, including 194 at SDSC)
205670(union of most IP zones)
193323zen.spamhaus.org (union of all results)
190588b.barracudacentral.org
173947l2.apews.org
164479zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
164382cbl.abuseat.org
148340dnsbl-1.uceprotect.net
146136hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
139095dnsbl-2.uceprotect.net
135487dnsbl-3.uceprotect.net
128484dnsbl.sorbs.net (union of all results)
126857psbl.surriel.com
117726ubl.unsubscore.com
113848zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
96884dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
86185hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
66768bl.spameatingmonkey.net
50505dnsbl.sorbs.net (result 127.0.0.10 = dialup)
50302blackholes.five-ten-sg.com (union of all results)
47146bl.spamcop.net
45566blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
41935db.wpbl.info
40826no-more-funn.moensted.dk (union of all results)
38806bl.tiopan.com
38611bl.score.senderscore.com
36411zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
30641ix.dnsbl.manitu.net
30273no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
22640mail-abuse.blacklist.jippg.org
16554hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
15151spam.dnsbl.sorbs.net
12151dnsbl.inps.de
9722korea.services.net
8480no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
6785bl.spamcannibal.org
4524list.dnswl.org (not a blacklist!)
4029spamsources.fabel.dk
3645blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2876hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2873dnsbl.ahbl.org (union of all results)
2815ips.backscatterer.org
2755dnsbl.ahbl.org (result 127.0.0.4 = spam source)
2268tr.countries.nerd.dk
2058dnsbl.njabl.org (union of all results)
1966hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1812dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1381hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1329no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1072blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
646no-more-funn.moensted.dk (result 127.0.0.9 = misc)
530zen.spamhaus.org (union of SBL and SBLCSS results)
488zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
460aspews.ext.sorbs.net
438accredit.habeas.com (not a blacklist!)
357query.bondedsender.org (not a blacklist!)
330dnsbl.sorbs.net (result 127.0.0.6 = spam source)
311l2.bbfh.ext.sorbs.net
171no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
154dnsbl.njabl.org (result 127.0.0.2 = open relay)
132iadb2.isipp.com (not a blacklist!)
126tor.dnsbl.sectoor.de (union of all results)
125tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
118dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
93iadb.isipp.com (not a blacklist!)
92dnsbl.njabl.org (result 127.0.0.4 = spam source)
91l1.bbfh.ext.sorbs.net
75hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
43dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
42zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
37dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
37bl.deadbeef.com
18blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
14multi.uribl.com (result 127.0.0.2 = spam resource)
14multi.uribl.com (union of all results)
11zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
6multi.surbl.org
5dnsbl-0.uceprotect.net
5hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4blackholes.brainerd.net
3spamguard.leadmon.net (union of all results)
2dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)


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
209262(total number of IP addresses whose names were tested, including 194 at SDSC)
132524hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
120886hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
110725(union of most domain zones)
95097l1.apews.org
87879abuse.rfc-ignorant.org
37558whois.rfc-ignorant.org (union of all results)
35741dynamic.rhs.mailpolice.com
29822whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
12107hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
7736whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4709webmail.rhs.mailpolice.com
3058hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2734hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
884adv.rhs.mailpolice.com
404urired.spameatingmonkey.net
347hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
291hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
220dbl.spamhaus.org
194hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
77multi.uribl.com (result 127.0.0.2 = spam resource)
77multi.uribl.com (union of all results)
73hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
61rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
61rhsbl.sorbs.net (union of all results)
60postmaster.rfc-ignorant.org
35bulk.rhs.mailpolice.com
35rhsbl.ahbl.org
33dsn.rfc-ignorant.org (zone not intended for this use)
31bogusmx.rfc-ignorant.org
21multi.surbl.org
17fresh.spameatingmonkey.net
14dob.sibl.support-intelligence.net
5bl.deadbeef.com
3porn.rhs.mailpolice.com
3hostkarma.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
93020(total number of domains tested, including 167 at SDSC)
88264hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
18925(union of most domain zones)
9168hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
8744whois.rfc-ignorant.org (union of all results)
8375whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6442hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4424abuse.rfc-ignorant.org
3357urired.spameatingmonkey.net
3111hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2486postmaster.rfc-ignorant.org
1587l1.apews.org
1495bogusmx.rfc-ignorant.org
979hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
945webmail.rhs.mailpolice.com
748multi.surbl.org
744multi.uribl.com (union of all results)
732multi.uribl.com (result 127.0.0.2 = spam resource)
680hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
670dbl.spamhaus.org
587dsn.rfc-ignorant.org
369whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
304adv.rhs.mailpolice.com
257porn.rhs.mailpolice.com
91bulk.rhs.mailpolice.com
49hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
42rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
42rhsbl.sorbs.net (union of all results)
35hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
24hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
23dynamic.rhs.mailpolice.com
20rhsbl.ahbl.org
17dob.sibl.support-intelligence.net
13ex.dnsbl.org
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
12fresh.spameatingmonkey.net
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
3fraud.rhs.mailpolice.com
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 25 February 2010.