Blacklists Compared

3 September 2011

[ 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, swl.spamhaus.org, and wl.mailspike.net zones because they are not blacklists. Because they are too aggressive to be widely useful the spam.dnsbl.sorbs.net and l2.apews.org zones are also excluded from the union.

HitsDNS Zone
48648(total number of IP addresses tested, including 169 at SDSC)
45953(union of most IP zones)
37015b.barracudacentral.org
36838l2.apews.org
35179zen.spamhaus.org (union of all results)
33647cbl.abuseat.org
33646zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
30367hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
28184bl.mailspike.net (union of all results)
24472dnsbl-1.uceprotect.net
23316zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
22941dnsbl-2.uceprotect.net
22912dnsbl-3.uceprotect.net
22282ddnsbl.internetdefensesystems.com
20583hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
19134bl.tiopan.com
18015truncate.gbudb.net
17410spam.dnsbl.sorbs.net
16875blackholes.five-ten-sg.com (union of all results)
16722bl.spameatingmonkey.net
16702ubl.unsubscore.com
13956psbl.surriel.com
12883bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
12560bl.mailspike.net (result 127.0.0.11 = very bad reputation)
12194dnsbl.sorbs.net (union of all results)
11984bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
9088blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
7974dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6168blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
5965db.wpbl.info
5811bl.spamcop.net
5741list.dnswl.org (not a blacklist!)
4970bl.score.senderscore.com
4822dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4577zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4546hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
4490no-more-funn.moensted.dk (union of all results)
4307ix.dnsbl.manitu.net
3844wl.mailspike.net (union of all results) (not a blacklist!)
3309dnsbl.inps.de
3061bl.mailspike.net (result 127.0.0.12 = bad reputation)
2626hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2578wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2455hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2420ips.backscatterer.org
2419no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1861no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1602hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1589blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1442korea.services.net
1260wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1189mail-abuse.blacklist.jippg.org
1171bl.spamcannibal.org
1061spamsources.fabel.dk
592accredit.habeas.com (not a blacklist!)
560query.bondedsender.org (not a blacklist!)
398dnsbl.njabl.org (union of all results)
345zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
345zen.spamhaus.org (union of SBL and SBLCSS results)
295dnsbl.njabl.org (result 127.0.0.9 = open proxy)
275aspews.ext.sorbs.net
269dnsbl.ahbl.org (union of all results)
198iadb2.isipp.com (not a blacklist!)
189tr.countries.nerd.dk
180iadb.isipp.com (not a blacklist!)
165dnsbl.ahbl.org (result 127.0.0.4 = spam source)
141hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
107no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
90l2.bbfh.ext.sorbs.net
86no-more-funn.moensted.dk (result 127.0.0.9 = misc)
77dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
71dnsbl.njabl.org (result 127.0.0.2 = open relay)
64dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
64dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
64dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
54dnsbl.sorbs.net (result 127.0.0.6 = spam source)
43tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
43tor.dnsbl.sectoor.de (union of all results)
38l1.bbfh.ext.sorbs.net
32dnsbl.njabl.org (result 127.0.0.4 = spam source)
30no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
29blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
27dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
19swl.spamhaus.org (union of all results) (not a blacklist!)
12bl.deadbeef.com
10swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
8hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
6multi.surbl.org
6wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
4spamguard.leadmon.net (union of all results)
3dnsbl-0.uceprotect.net
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1multi.uribl.com (union of all results)
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
48648(total number of IP addresses whose names were tested, including 169 at SDSC)
26306hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
20735hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
17581(union of most domain zones)
14034abuse.rfc-ignorant.org
10932l1.apews.org
7066whois.rfc-ignorant.org (union of all results)
6052whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3986hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2776hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1016whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
450hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
267dbl.spamhaus.org (result 127.0.1.2 = spam source)
267dbl.spamhaus.org (union of all results)
216hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
201hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
199urired.spameatingmonkey.net
146hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
117hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
40postmaster.rfc-ignorant.org
39bogusmx.rfc-ignorant.org
27multi.surbl.org
20rhsbl.ahbl.org
13fresh.spameatingmonkey.net
11multi.uribl.com (result 127.0.0.2 = spam resource)
11hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
11multi.uribl.com (union of all results)
5dsn.rfc-ignorant.org (zone not intended for this use)
3dob.sibl.support-intelligence.net
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
31102(total number of domains tested, including 143 at SDSC)
24843hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7015(union of most domain zones)
4008hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3743whois.rfc-ignorant.org (union of all results)
3608whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2170hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2160hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1362hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1343abuse.rfc-ignorant.org
761urired.spameatingmonkey.net
739postmaster.rfc-ignorant.org
647l1.apews.org
609bogusmx.rfc-ignorant.org
565hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
545dbl.spamhaus.org (result 127.0.1.2 = spam source)
545dbl.spamhaus.org (union of all results)
391multi.uribl.com (union of all results)
380multi.uribl.com (result 127.0.0.2 = spam resource)
369multi.surbl.org
316hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
248dsn.rfc-ignorant.org
207hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
135whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
124fresh.spameatingmonkey.net
55dob.sibl.support-intelligence.net
22rhsbl.ahbl.org
17hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10ex.dnsbl.org
6hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 5 September 2011.