Blacklists Compared

12 December 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
126973(total number of IP addresses tested, including 202 at SDSC)
123355(union of most IP zones)
114282b.barracudacentral.org
112537zen.spamhaus.org (union of all results)
105192l2.apews.org
97254cbl.abuseat.org
97174zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
80252dnsbl.sorbs.net (union of all results)
75457hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
75368dnsbl-1.uceprotect.net
73082zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
73039dnsbl-2.uceprotect.net
72693dnsbl-3.uceprotect.net
70034psbl.surriel.com
64463ubl.unsubscore.com
64451dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
59034bl.spameatingmonkey.net
43083blackholes.five-ten-sg.com (union of all results)
38716blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
31773hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
31217no-more-funn.moensted.dk (union of all results)
25522bl.score.senderscore.com
25227dnsbl.sorbs.net (result 127.0.0.10 = dialup)
24215db.wpbl.info
23472bl.spamcop.net
16779no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
16690zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
14343spam.dnsbl.sorbs.net
13909hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
13016ix.dnsbl.manitu.net
9290no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
9045mail-abuse.blacklist.jippg.org
8925dnsbl.inps.de
7572korea.services.net
6094bl.spamcannibal.org
3936spamsources.fabel.dk
3807list.dnswl.org (not a blacklist!)
3354no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
3136ips.backscatterer.org
3112blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2902hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1997hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1804no-more-funn.moensted.dk (result 127.0.0.9 = misc)
1638dnsbl.njabl.org (union of all results)
1345hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1340dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1234blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1060tr.countries.nerd.dk
828zen.spamhaus.org (union of SBL and SBLCSS results)
707zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
556l2.bbfh.ext.sorbs.net
513accredit.habeas.com (not a blacklist!)
505aspews.ext.sorbs.net
402query.bondedsender.org (not a blacklist!)
284l1.bbfh.ext.sorbs.net
213dnsbl.sorbs.net (result 127.0.0.6 = spam source)
166dnsbl.njabl.org (result 127.0.0.2 = open relay)
155iadb2.isipp.com (not a blacklist!)
144hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
132dnsbl.njabl.org (result 127.0.0.4 = spam source)
123dnsbl.ahbl.org (union of all results)
121zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
119iadb.isipp.com (not a blacklist!)
99dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
76no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
55tor.dnsbl.sectoor.de (union of all results)
54tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
33bl.deadbeef.com
23dnsbl.ahbl.org (result 127.0.0.4 = spam source)
20blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
17dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
13dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
12zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
12multi.uribl.com (result 127.0.0.2 = spam resource)
12multi.uribl.com (union of all results)
10dnsbl-0.uceprotect.net
10blackholes.brainerd.net
2multi.surbl.org
2spamguard.leadmon.net (union of all results)
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)
1dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)

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
126973(total number of IP addresses whose names were tested, including 202 at SDSC)
71688hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
60075hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
57792(union of most domain zones)
49485l1.apews.org
47591abuse.rfc-ignorant.org
20966dynamic.rhs.mailpolice.com
20107whois.rfc-ignorant.org (union of all results)
15175whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
7605hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4932whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3073hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3021webmail.rhs.mailpolice.com
908adv.rhs.mailpolice.com
596hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
496urired.spameatingmonkey.net
485hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
289hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
279bl.deadbeef.com
224hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
108rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
108rhsbl.sorbs.net (union of all results)
74hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
64postmaster.rfc-ignorant.org
43multi.surbl.org
40multi.uribl.com (result 127.0.0.2 = spam resource)
40rhsbl.ahbl.org
40multi.uribl.com (union of all results)
39bulk.rhs.mailpolice.com
38dsn.rfc-ignorant.org (zone not intended for this use)
32bogusmx.rfc-ignorant.org
24fresh.spameatingmonkey.net
24dob.sibl.support-intelligence.net
3porn.rhs.mailpolice.com
1hostkarma.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
55051(total number of domains tested, including 193 at SDSC)
51860hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
12775(union of most domain zones)
6218hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4503hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4275whois.rfc-ignorant.org (union of all results)
3963whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3146urired.spameatingmonkey.net
2784abuse.rfc-ignorant.org
2517hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1441l1.apews.org
1371hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1293postmaster.rfc-ignorant.org
1281bogusmx.rfc-ignorant.org
1076multi.surbl.org
832multi.uribl.com (union of all results)
820multi.uribl.com (result 127.0.0.2 = spam resource)
788webmail.rhs.mailpolice.com
502hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
459dsn.rfc-ignorant.org
330adv.rhs.mailpolice.com
312whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
159porn.rhs.mailpolice.com
133dynamic.rhs.mailpolice.com
95hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
69bulk.rhs.mailpolice.com
44hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
26rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
26rhsbl.sorbs.net (union of all results)
24hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
19rhsbl.ahbl.org
15ex.dnsbl.org
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
7hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
6dob.sibl.support-intelligence.net
3fresh.spameatingmonkey.net
2bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 17 December 2009.