Blacklists Compared

28 May 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
51337(total number of IP addresses tested, including 162 at SDSC)
48120(union of most IP zones)
39240b.barracudacentral.org
38120zen.spamhaus.org (union of all results)
36320cbl.abuseat.org
36225zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
31006bl.mailspike.net (union of all results)
30980hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
27902dnsbl-1.uceprotect.net
25183zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
24152spam.dnsbl.sorbs.net
23502dnsbl-2.uceprotect.net
23320dnsbl-3.uceprotect.net
22203bl.tiopan.com
21963dnsbl.sorbs.net (union of all results)
19436bl.spameatingmonkey.net
19217ddnsbl.internetdefensesystems.com
17924hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
17504dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
17368truncate.gbudb.net
17046blackholes.five-ten-sg.com (union of all results)
15696psbl.surriel.com
15264bl.mailspike.net (result 127.0.0.11 = very bad reputation)
14645bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
11543bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
9066blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
7270db.wpbl.info
7243ubl.unsubscore.com
6760bl.spamcop.net
6379blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
5874bl.score.senderscore.com
5596list.dnswl.org (not a blacklist!)
5274dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4943hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
4714no-more-funn.moensted.dk (union of all results)
3819wl.mailspike.net (union of all results) (not a blacklist!)
3612bl.mailspike.net (result 127.0.0.12 = bad reputation)
3408zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3399dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3344ix.dnsbl.manitu.net
3158dnsbl.inps.de
3087ips.backscatterer.org
2776hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2517no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2343hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2340wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1995no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1974korea.services.net
1578blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1476hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1464wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1312bl.spamcannibal.org
1287spamsources.fabel.dk
1251mail-abuse.blacklist.jippg.org
601l2.bbfh.ext.sorbs.net
590zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
590zen.spamhaus.org (union of SBL and SBLCSS results)
575accredit.habeas.com (not a blacklist!)
534query.bondedsender.org (not a blacklist!)
453dnsbl.njabl.org (union of all results)
421aspews.ext.sorbs.net
339dnsbl.njabl.org (result 127.0.0.9 = open proxy)
309tr.countries.nerd.dk
249iadb2.isipp.com (not a blacklist!)
222iadb.isipp.com (not a blacklist!)
192l1.bbfh.ext.sorbs.net
141dnsbl.ahbl.org (union of all results)
119hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
96no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
85dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
82dnsbl.njabl.org (result 127.0.0.2 = open relay)
69no-more-funn.moensted.dk (result 127.0.0.9 = misc)
60dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
60dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
60dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
53no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
36tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
36tor.dnsbl.sectoor.de (union of all results)
32dnsbl.njabl.org (result 127.0.0.4 = spam source)
32dnsbl.ahbl.org (result 127.0.0.4 = spam source)
24dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
22blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
15wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
11swl.spamhaus.org (union of all results) (not a blacklist!)
10bl.deadbeef.com
7swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
5dnsbl-0.uceprotect.net
4swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
3hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (union of all results)
1multi.surbl.org
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
51337(total number of IP addresses whose names were tested, including 162 at SDSC)
29372hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
23539hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
19543(union of most domain zones)
16665abuse.rfc-ignorant.org
6168whois.rfc-ignorant.org (union of all results)
4894whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4040hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2950hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1276whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
415hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
326hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
257hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
230hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
195urired.spameatingmonkey.net
145hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
143dbl.spamhaus.org (result 127.0.1.2 = spam source)
143dbl.spamhaus.org (union of all results)
39bogusmx.rfc-ignorant.org
38postmaster.rfc-ignorant.org
22multi.surbl.org
19rhsbl.ahbl.org
11hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
9dsn.rfc-ignorant.org (zone not intended for this use)
8fresh.spameatingmonkey.net
8dob.sibl.support-intelligence.net
7multi.uribl.com (result 127.0.0.2 = spam resource)
7multi.uribl.com (union of all results)
4bl.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
23824(total number of domains tested, including 129 at SDSC)
17596hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5971(union of most domain zones)
4033hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2600whois.rfc-ignorant.org (union of all results)
2462whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2368hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2245hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1554abuse.rfc-ignorant.org
847hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
825postmaster.rfc-ignorant.org
794dbl.spamhaus.org (result 127.0.1.2 = spam source)
794dbl.spamhaus.org (union of all results)
686hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
670multi.surbl.org
595multi.uribl.com (union of all results)
589multi.uribl.com (result 127.0.0.2 = spam resource)
522bogusmx.rfc-ignorant.org
488urired.spameatingmonkey.net
403hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
279dsn.rfc-ignorant.org
139rhsbl.ahbl.org
138whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
80fresh.spameatingmonkey.net
59dob.sibl.support-intelligence.net
26hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
15hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
9ex.dnsbl.org
5multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
4hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
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 31 May 2011.