Blacklists Compared

3 April 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, iadb2.isipp.com, and wl.mailspike.net 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
189944(total number of IP addresses tested, including 193 at SDSC)
186179(union of most IP zones)
177096b.barracudacentral.org
175209zen.spamhaus.org (union of all results)
158615l2.apews.org
153496cbl.abuseat.org
153487zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
137977hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
134155dnsbl-1.uceprotect.net
126837dnsbl-2.uceprotect.net
121666dnsbl-3.uceprotect.net
118979dnsbl.sorbs.net (union of all results)
112332bl.mailspike.net (union of all results)
105064zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
104549psbl.surriel.com
89176dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
88311hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
64644ubl.unsubscore.com
61545bl.spameatingmonkey.net
56081spam.dnsbl.sorbs.net
52247bl.mailspike.net (result 127.0.0.12 = bad reputation)
44775dnsbl.sorbs.net (result 127.0.0.10 = dialup)
42111blackholes.five-ten-sg.com (union of all results)
38309blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
37146no-more-funn.moensted.dk (union of all results)
36123bl.spamcop.net
34505bl.tiopan.com
32898zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
31331db.wpbl.info
28655bl.mailspike.net (result 127.0.0.11 = very bad reputation)
27673no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
27292bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
24730ix.dnsbl.manitu.net
23966bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
20597bl.score.senderscore.com
18170mail-abuse.blacklist.jippg.org
12314dnsbl.inps.de
11798hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8144korea.services.net
7730no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
6370dnsbl.ahbl.org (union of all results)
6283dnsbl.ahbl.org (result 127.0.0.4 = spam source)
6137bl.spamcannibal.org
4978dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4367list.dnswl.org (not a blacklist!)
3812spamsources.fabel.dk
2858blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2852hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2701wl.mailspike.net (union of all results) (not a blacklist!)
2512tr.countries.nerd.dk
2491ips.backscatterer.org
2152wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2045hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1885dnsbl.njabl.org (union of all results)
1645dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1408hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1037no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
933blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
683no-more-funn.moensted.dk (result 127.0.0.9 = misc)
549wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
497zen.spamhaus.org (union of SBL and SBLCSS results)
493accredit.habeas.com (not a blacklist!)
492aspews.ext.sorbs.net
475zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
413query.bondedsender.org (not a blacklist!)
194l2.bbfh.ext.sorbs.net
158iadb2.isipp.com (not a blacklist!)
157dnsbl.njabl.org (result 127.0.0.2 = open relay)
117iadb.isipp.com (not a blacklist!)
110tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
110tor.dnsbl.sectoor.de (union of all results)
99hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
91no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
87dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
83dnsbl.njabl.org (result 127.0.0.4 = spam source)
73l1.bbfh.ext.sorbs.net
46bl.deadbeef.com
41dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
32dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
22zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
14dnsbl-0.uceprotect.net
13multi.surbl.org
10blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
9zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
6multi.uribl.com (result 127.0.0.2 = spam resource)
6multi.uribl.com (union of all results)
5spamguard.leadmon.net (union of all results)
4spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
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 127.0.0.8 = open proxy)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
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
189944(total number of IP addresses whose names were tested, including 193 at SDSC)
116351hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
105199hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
98204(union of most domain zones)
83806l1.apews.org
78635abuse.rfc-ignorant.org
33979whois.rfc-ignorant.org (union of all results)
31644dynamic.rhs.mailpolice.com
25776whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
12063hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
8203whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4251webmail.rhs.mailpolice.com
3056hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1603hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
847adv.rhs.mailpolice.com
447hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
434hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
335urired.spameatingmonkey.net
313hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
249dbl.spamhaus.org
107rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
107rhsbl.sorbs.net (union of all results)
86multi.uribl.com (union of all results)
85multi.uribl.com (result 127.0.0.2 = spam resource)
71hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
57postmaster.rfc-ignorant.org
46multi.surbl.org
39dsn.rfc-ignorant.org (zone not intended for this use)
39bulk.rhs.mailpolice.com
35rhsbl.ahbl.org
26bogusmx.rfc-ignorant.org
24fresh.spameatingmonkey.net
24dob.sibl.support-intelligence.net
14porn.rhs.mailpolice.com
4bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)

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
73724(total number of domains tested, including 174 at SDSC)
70512hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
12853(union of most domain zones)
6379hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4668whois.rfc-ignorant.org (union of all results)
4435whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3501hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3321urired.spameatingmonkey.net
2881abuse.rfc-ignorant.org
2078hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1749postmaster.rfc-ignorant.org
1275bogusmx.rfc-ignorant.org
1217l1.apews.org
749hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
668webmail.rhs.mailpolice.com
642dbl.spamhaus.org
580multi.uribl.com (union of all results)
569multi.surbl.org
568multi.uribl.com (result 127.0.0.2 = spam resource)
444hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
347dsn.rfc-ignorant.org
265adv.rhs.mailpolice.com
233whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
166porn.rhs.mailpolice.com
118hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
62bulk.rhs.mailpolice.com
19fresh.spameatingmonkey.net
19hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
19dob.sibl.support-intelligence.net
17rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
17rhsbl.sorbs.net (union of all results)
16hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
16rhsbl.ahbl.org
13ex.dnsbl.org
10dynamic.rhs.mailpolice.com
7multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
5multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1fraud.rhs.mailpolice.com
1bl.deadbeef.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 7 April 2010.