Blacklists Compared

12 June 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
200105(total number of IP addresses tested, including 178 at SDSC)
196874(union of most IP zones)
184322zen.spamhaus.org (union of all results)
175115b.barracudacentral.org
170262l2.apews.org
155260cbl.abuseat.org
155076zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
145411hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
139027dnsbl-1.uceprotect.net
137846psbl.surriel.com
135746dnsbl-2.uceprotect.net
135621bl.mailspike.net (union of all results)
130814dnsbl-3.uceprotect.net
110924zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
110352dnsbl.sorbs.net (union of all results)
105199bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
104891bl.spameatingmonkey.net
99600ubl.unsubscore.com
83637hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
75343dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
66039bl.tiopan.com
62966spam.dnsbl.sorbs.net
60860bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
53003blackholes.five-ten-sg.com (union of all results)
50486dnsbl.sorbs.net (result 127.0.0.10 = dialup)
46566bl.spamcop.net
45711bl.score.senderscore.com
45083blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
35754zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
31773db.wpbl.info
27587ix.dnsbl.manitu.net
26704no-more-funn.moensted.dk (union of all results)
19987mail-abuse.blacklist.jippg.org
19453no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
17687bl.mailspike.net (result 127.0.0.12 = bad reputation)
16209dnsbl.inps.de
15421hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8609bl.mailspike.net (result 127.0.0.11 = very bad reputation)
6944no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
6558blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6201korea.services.net
5458bl.spamcannibal.org
4933dnsbl.ahbl.org (union of all results)
4290list.dnswl.org (not a blacklist!)
4265spamsources.fabel.dk
3211ips.backscatterer.org
3138dnsbl.ahbl.org (result 127.0.0.4 = spam source)
2952hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2471wl.mailspike.net (union of all results) (not a blacklist!)
2099hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1934dnsbl.njabl.org (union of all results)
1928wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1916tr.countries.nerd.dk
1729dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1669dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1329blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1321hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1049dnsbl.sorbs.net (result 127.0.0.6 = spam source)
528accredit.habeas.com (not a blacklist!)
503wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
443aspews.ext.sorbs.net
436query.bondedsender.org (not a blacklist!)
315zen.spamhaus.org (union of SBL and SBLCSS results)
306zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
234no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
173dnsbl.njabl.org (result 127.0.0.2 = open relay)
171tor.dnsbl.sectoor.de (union of all results)
170tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
145no-more-funn.moensted.dk (result 127.0.0.9 = misc)
141iadb2.isipp.com (not a blacklist!)
134hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
114no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
112iadb.isipp.com (not a blacklist!)
92dnsbl.njabl.org (result 127.0.0.4 = spam source)
66l2.bbfh.ext.sorbs.net
66dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
46bl.deadbeef.com
40wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
31blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
27l1.bbfh.ext.sorbs.net
15dnsbl-0.uceprotect.net
12zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
12spamguard.leadmon.net (union of all results)
9zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
7multi.surbl.org
7spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
5multi.uribl.com (result 127.0.0.2 = spam resource)
5hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5multi.uribl.com (union of all results)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)

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
200105(total number of IP addresses whose names were tested, including 178 at SDSC)
128584hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
118565hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
107601(union of most domain zones)
91452l1.apews.org
85812abuse.rfc-ignorant.org
37133whois.rfc-ignorant.org (union of all results)
27111whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
19922dynamic.rhs.mailpolice.com
12409hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
10022whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3116hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2621hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
2285webmail.rhs.mailpolice.com
497hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
366urired.spameatingmonkey.net
349hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
270adv.rhs.mailpolice.com
207dbl.spamhaus.org
158hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
80postmaster.rfc-ignorant.org
68rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
68rhsbl.sorbs.net (union of all results)
59hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
53dsn.rfc-ignorant.org (zone not intended for this use)
46bogusmx.rfc-ignorant.org
35rhsbl.ahbl.org
26multi.uribl.com (result 127.0.0.2 = spam resource)
26multi.uribl.com (union of all results)
22multi.surbl.org
17bulk.rhs.mailpolice.com
16fresh.spameatingmonkey.net
16dob.sibl.support-intelligence.net
6bl.deadbeef.com
1porn.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
59422(total number of domains tested, including 169 at SDSC)
57720hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
9060(union of most domain zones)
6132hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2932hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2725abuse.rfc-ignorant.org
2637whois.rfc-ignorant.org (union of all results)
2401whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2303urired.spameatingmonkey.net
1957hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1708postmaster.rfc-ignorant.org
1051l1.apews.org
886hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
753bogusmx.rfc-ignorant.org
752dbl.spamhaus.org
698multi.surbl.org
586multi.uribl.com (union of all results)
577multi.uribl.com (result 127.0.0.2 = spam resource)
511hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
305dsn.rfc-ignorant.org
236whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
25rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
25rhsbl.sorbs.net (union of all results)
21hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
19hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
17hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
15rhsbl.ahbl.org
13ex.dnsbl.org
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
4hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2fresh.spameatingmonkey.net
2dob.sibl.support-intelligence.net
2bl.deadbeef.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 18 June 2010.