Blacklists Compared

23 February 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
78045(total number of IP addresses tested, including 190 at SDSC)
73143(union of most IP zones)
62382b.barracudacentral.org
60681zen.spamhaus.org (union of all results)
60577l2.apews.org
59257cbl.abuseat.org
59256zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
57386ip.v4bl.org
54934bl.tiopan.com
47399bl.mailspike.net (union of all results)
43732dnsbl-1.uceprotect.net
38853zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
38144bl.mailspike.net (result 127.0.0.12 = bad reputation)
37415hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
31602hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
27820dnsbl.sorbs.net (union of all results)
27387spam.dnsbl.sorbs.net
25872ubl.unsubscore.com
25266dnsbl-2.uceprotect.net
24978dnsbl-3.uceprotect.net
24143db.wpbl.info
23383all.spamrats.com (union of all results)
23381bl.spameatingmonkey.net
21898dnsbl.inps.de
19050psbl.surriel.com
17077free.v4bl.org
15755dnsbl.sorbs.net (result 127.0.0.10 = dialup)
15270all.spamrats.com (result 127.0.0.36 = dialup)
11257dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
9306truncate.gbudb.net
8456wl.mailspike.net (union of all results) (not a blacklist!)
7963bl.spamcop.net
7599all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
7498zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
7457bl.mailspike.net (result 127.0.0.11 = very bad reputation)
7395list.dnswl.org (not a blacklist!)
5579ix.dnsbl.manitu.net
5489dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5437wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
4950ips.backscatterer.org
4846bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
3955bl.score.senderscore.com
3885hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3117hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2899hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2729wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2015all.s5h.net
1803hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1587bl.spamcannibal.org
1126zen.spamhaus.org (union of SBL and SBLCSS results)
935spamsources.fabel.dk
761accredit.habeas.com (not a blacklist!)
747tr.countries.nerd.dk
741mail-abuse.blacklist.jippg.org
726hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
619zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
598query.bondedsender.org (not a blacklist!)
590all.spamrats.com (result 127.0.0.38 = spam source)
508bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
507zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
493korea.services.net
330dnsbl.njabl.org (union of all results)
319l2.bbfh.ext.sorbs.net
292dnsbl.njabl.org (result 127.0.0.9 = open proxy)
192dnsbl.ahbl.org (union of all results)
188iadb.isipp.com (not a blacklist!)
181wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
144dnsbl.ahbl.org (result 127.0.0.4 = spam source)
109wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
81iadb2.isipp.com (not a blacklist!)
57dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
57dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
57dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
50tor.dnsbl.sectoor.de (union of all results)
48tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
32dnsbl.njabl.org (result 127.0.0.2 = open relay)
32dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
16dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
8hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
6dnsbl.njabl.org (result 127.0.0.4 = spam source)
4multi.surbl.org
3multi.uribl.com (result 127.0.0.2 = spam resource)
3multi.uribl.com (union of all results)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl-0.uceprotect.net
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
78045(total number of IP addresses whose names were tested, including 190 at SDSC)
50389hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
41066hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
25394l1.apews.org
5972hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3287(union of most domain zones)
2998hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1086hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
1057hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
738hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
653dbl.spamhaus.org (union of all results)
652dbl.spamhaus.org (result 127.0.1.2 = spam source)
216hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
130urired.spameatingmonkey.net
97hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
57dob.sibl.support-intelligence.net
51multi.uribl.com (union of all results)
50multi.surbl.org
48multi.uribl.com (result 127.0.0.2 = spam resource)
46fresh.spameatingmonkey.net
29rhsbl.ahbl.org
10hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
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
68242(total number of domains tested, including 152 at SDSC)
65385hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4708hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3434(union of most domain zones)
3048hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2532hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2517hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2199dbl.spamhaus.org (union of all results)
2197dbl.spamhaus.org (result 127.0.1.2 = spam source)
1825multi.surbl.org
1480multi.uribl.com (union of all results)
1467multi.uribl.com (result 127.0.0.2 = spam resource)
1173hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
876l1.apews.org
425urired.spameatingmonkey.net
324fresh.spameatingmonkey.net
322dob.sibl.support-intelligence.net
304hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
42hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
23rhsbl.ahbl.org
15hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
13multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
9hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
9ex.dnsbl.org
2dbl.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 27 February 2013.