Blacklists Compared

16 March 2013

[ 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, l2.apews.org, and ip.v4bl.org zones are also excluded from the union.

HitsDNS Zone
88042(total number of IP addresses tested, including 156 at SDSC)
83466(union of most IP zones)
72938ip.v4bl.org
72674b.barracudacentral.org
70818zen.spamhaus.org (union of all results)
65777bl.tiopan.com
62871cbl.abuseat.org
62793zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
53285dnsbl-1.uceprotect.net
52299bl.mailspike.net (union of all results)
48162zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
46494bl.mailspike.net (result 127.0.0.12 = bad reputation)
46493hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
37640spam.dnsbl.sorbs.net
36159hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
33418db.wpbl.info
33167dnsbl.sorbs.net (union of all results)
32195psbl.surriel.com
31834bl.spameatingmonkey.net
31082dnsbl-3.uceprotect.net
29573dnsbl-2.uceprotect.net
28538all.spamrats.com (union of all results)
28405dnsbl.inps.de
23279free.v4bl.org
23211ubl.unsubscore.com
19777all.spamrats.com (result 127.0.0.36 = dialup)
19103dnsbl.sorbs.net (result 127.0.0.10 = dialup)
14909dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
13738truncate.gbudb.net
9746wl.mailspike.net (union of all results) (not a blacklist!)
8483all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
7608zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
7345list.dnswl.org (not a blacklist!)
7257hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
6904bl.spamcop.net
6068ips.backscatterer.org
5629bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
5491wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
4998dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4990bl.score.senderscore.com
4347ix.dnsbl.manitu.net
4327bl.mailspike.net (result 127.0.0.11 = very bad reputation)
3963wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
3383hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3377hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2686all.s5h.net
1895hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1738bl.spamcannibal.org
1523mail-abuse.blacklist.jippg.org
1176zen.spamhaus.org (union of SBL and SBLCSS results)
1140spamsources.fabel.dk
835tr.countries.nerd.dk
731accredit.habeas.com (not a blacklist!)
695zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
623hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
617query.bondedsender.org (not a blacklist!)
494korea.services.net
481zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
369all.spamrats.com (result 127.0.0.38 = spam source)
291l2.bbfh.ext.sorbs.net
210iadb.isipp.com (not a blacklist!)
187wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
167bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
159dnsbl.ahbl.org (union of all results)
105wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
104dnsbl.ahbl.org (result 127.0.0.4 = spam source)
92iadb2.isipp.com (not a blacklist!)
59dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
59dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
59dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
47tor.dnsbl.sectoor.de (union of all results)
42tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
39dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
16dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
11multi.surbl.org
11dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
5tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
4hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3spamguard.leadmon.net (union of all results)
2wadb.isipp.com
2dnsbl-0.uceprotect.net
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
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
88042(total number of IP addresses whose names were tested, including 156 at SDSC)
57036hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
47287hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7104hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3126(union of most domain zones)
3076hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1080hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
887hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
824hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
616dbl.spamhaus.org (result 127.0.1.2 = spam source)
616dbl.spamhaus.org (union of all results)
194hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
145hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
60multi.surbl.org
60fresh.spameatingmonkey.net
55dob.sibl.support-intelligence.net
51multi.uribl.com (result 127.0.0.2 = spam resource)
51multi.uribl.com (union of all results)
42urired.spameatingmonkey.net
26rhsbl.ahbl.org
6hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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
87679(total number of domains tested, including 103 at SDSC)
82470hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5303hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3911(union of most domain zones)
3347hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3016hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2861hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2373dbl.spamhaus.org (union of all results)
2369dbl.spamhaus.org (result 127.0.1.2 = spam source)
1829multi.surbl.org
1449hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1418multi.uribl.com (union of all results)
1399multi.uribl.com (result 127.0.0.2 = spam resource)
498dob.sibl.support-intelligence.net
457fresh.spameatingmonkey.net
344hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
81urired.spameatingmonkey.net
49hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
23hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
21rhsbl.ahbl.org
15multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
7ex.dnsbl.org
6hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
4multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
4dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 19 March 2013.