Blacklists Compared

5 March 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
84069(total number of IP addresses tested, including 162 at SDSC)
80752(union of most IP zones)
71543b.barracudacentral.org
70338zen.spamhaus.org (union of all results)
69207l2.apews.org
67939zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
67933cbl.abuseat.org
60404hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
54382bl.mailspike.net (union of all results)
53918dnsbl-1.uceprotect.net
45376zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
43178dnsbl-2.uceprotect.net
43140bl.spameatingmonkey.net
42416dnsbl-3.uceprotect.net
40698bl.tiopan.com
39249hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
35855ddnsbl.internetdefensesystems.com
35205psbl.surriel.com
31543bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
30692spam.dnsbl.sorbs.net
27494blackholes.five-ten-sg.com (union of all results)
21809bl.mailspike.net (result 127.0.0.11 = very bad reputation)
19323db.wpbl.info
19318dnsbl.sorbs.net (union of all results)
17356bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
16621bl.spamcop.net
16613ubl.unsubscore.com
15798blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
12426dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10528ix.dnsbl.manitu.net
10302blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
9595dnsbl.inps.de
8860bl.mailspike.net (result 127.0.0.12 = bad reputation)
8611no-more-funn.moensted.dk (union of all results)
8516zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
7877mail-abuse.blacklist.jippg.org
5273list.dnswl.org (not a blacklist!)
5154hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5127no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
4012wl.mailspike.net (union of all results) (not a blacklist!)
3982dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3691ips.backscatterer.org
3581dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3396hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3295no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2429hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2425wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2052korea.services.net
1803bl.spamcannibal.org
1773spamsources.fabel.dk
1579wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1368blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
951hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
875bl.score.senderscore.com
740l2.bbfh.ext.sorbs.net
701dnsbl.njabl.org (union of all results)
636tr.countries.nerd.dk
607dnsbl.njabl.org (result 127.0.0.9 = open proxy)
564accredit.habeas.com (not a blacklist!)
481query.bondedsender.org (not a blacklist!)
368aspews.ext.sorbs.net
301dnsbl.ahbl.org (union of all results)
279zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
279zen.spamhaus.org (union of SBL and SBLCSS results)
243l1.bbfh.ext.sorbs.net
191dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
149iadb2.isipp.com (not a blacklist!)
127iadb.isipp.com (not a blacklist!)
114dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
114dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
114dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
112no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
102no-more-funn.moensted.dk (result 127.0.0.9 = misc)
96hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
89dnsbl.ahbl.org (result 127.0.0.4 = spam source)
59dnsbl.njabl.org (result 127.0.0.2 = open relay)
58tor.dnsbl.sectoor.de (union of all results)
56tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
47no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
35dnsbl.njabl.org (result 127.0.0.4 = spam source)
25blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
21dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
20bl.deadbeef.com
18swl.spamhaus.org (union of all results) (not a blacklist!)
12multi.surbl.org
11swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
10zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
8wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
7swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
2dnsbl-0.uceprotect.net
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (union of all results)
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)
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
84069(total number of IP addresses whose names were tested, including 162 at SDSC)
49889hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
42094hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
35622(union of most domain zones)
30884abuse.rfc-ignorant.org
28884l1.apews.org
11786whois.rfc-ignorant.org (union of all results)
9060whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5131hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3876hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2727whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
893hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
720hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
287hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
244urired.spameatingmonkey.net
147dbl.spamhaus.org
132hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
109hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
62postmaster.rfc-ignorant.org
39bogusmx.rfc-ignorant.org
34dsn.rfc-ignorant.org (zone not intended for this use)
25rhsbl.ahbl.org
17multi.surbl.org
16fresh.spameatingmonkey.net
10hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
9dob.sibl.support-intelligence.net
6multi.uribl.com (result 127.0.0.2 = spam resource)
6multi.uribl.com (union of all results)
2bl.deadbeef.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
34382(total number of domains tested, including 121 at SDSC)
25532hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
9238(union of most domain zones)
5846hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
5720hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4480whois.rfc-ignorant.org (union of all results)
4276whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2925hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2768hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2530abuse.rfc-ignorant.org
1535postmaster.rfc-ignorant.org
1034l1.apews.org
929urired.spameatingmonkey.net
780dbl.spamhaus.org
774hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
656bogusmx.rfc-ignorant.org
497multi.surbl.org
406hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
400multi.uribl.com (union of all results)
390multi.uribl.com (result 127.0.0.2 = spam resource)
365dsn.rfc-ignorant.org
204whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
152fresh.spameatingmonkey.net
104dob.sibl.support-intelligence.net
75hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
18rhsbl.ahbl.org
15hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8ex.dnsbl.org
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 8 March 2011.