Blacklists Compared

27 October 2012

[ 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
35892(total number of IP addresses tested, including 148 at SDSC)
31842(union of most IP zones)
23882l2.apews.org
23740b.barracudacentral.org
23450ip.v4bl.org
23034zen.spamhaus.org (union of all results)
21876zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
21875cbl.abuseat.org
21393bl.tiopan.com
18337hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
18185hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14885dnsbl-1.uceprotect.net
14043zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
14036ubl.unsubscore.com
13310bl.mailspike.net (union of all results)
10972bl.mailspike.net (result 127.0.0.12 = bad reputation)
10700dnsbl-2.uceprotect.net
10393all.spamrats.com (union of all results)
10207dnsbl.sorbs.net (union of all results)
10112psbl.surriel.com
10109wl.mailspike.net (union of all results) (not a blacklist!)
10035dnsbl-3.uceprotect.net
8266dnsbl.inps.de
8133spam.dnsbl.sorbs.net
7684bl.spameatingmonkey.net
7437dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6405list.dnswl.org (not a blacklist!)
6184wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
5952free.v4bl.org
5289all.spamrats.com (result 127.0.0.36 = dialup)
4780all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
4314bl.spamcop.net
4230db.wpbl.info
3504dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3160wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
3143truncate.gbudb.net
3014hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2871hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1862ips.backscatterer.org
1860bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1846zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1701bl.mailspike.net (result 127.0.0.11 = very bad reputation)
1665ix.dnsbl.manitu.net
1660hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1632all.s5h.net
1503bl.score.senderscore.com
1475zen.spamhaus.org (union of SBL and SBLCSS results)
1258hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1229bl.spamcannibal.org
1074mail-abuse.blacklist.jippg.org
936spamsources.fabel.dk
822zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
794accredit.habeas.com (not a blacklist!)
727korea.services.net
669query.bondedsender.org (not a blacklist!)
653zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
585wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
361all.spamrats.com (result 127.0.0.38 = spam source)
320l2.bbfh.ext.sorbs.net
266tr.countries.nerd.dk
253iadb.isipp.com (not a blacklist!)
242aspews.ext.sorbs.net
213bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
188wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
163dnsbl.njabl.org (union of all results)
137iadb2.isipp.com (not a blacklist!)
123dnsbl.ahbl.org (union of all results)
115dnsbl.njabl.org (result 127.0.0.9 = open proxy)
105hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
78dnsbl.ahbl.org (result 127.0.0.4 = spam source)
46tor.dnsbl.sectoor.de (union of all results)
45tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
29dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
28dnsbl.njabl.org (result 127.0.0.4 = spam source)
20dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
20dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
20dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
20dnsbl.njabl.org (result 127.0.0.2 = open relay)
16dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
6multi.surbl.org
6spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
6spamguard.leadmon.net (union of all results)
4multi.uribl.com (result 127.0.0.2 = spam resource)
4multi.uribl.com (union of all results)
3dnsbl-0.uceprotect.net
3dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1wadb.isipp.com
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1swl.spamhaus.org (union of all results) (not a blacklist!)
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
35892(total number of IP addresses whose names were tested, including 148 at SDSC)
19451hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16013hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
5983l1.apews.org
2642hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2606hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1165(union of most domain zones)
403hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
360dbl.spamhaus.org (result 127.0.1.2 = spam source)
360dbl.spamhaus.org (union of all results)
252hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
210hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
190hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
55hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
50fresh.spameatingmonkey.net
36urired.spameatingmonkey.net
35multi.uribl.com (result 127.0.0.2 = spam resource)
35multi.uribl.com (union of all results)
33dob.sibl.support-intelligence.net
29rhsbl.ahbl.org
21multi.surbl.org
13hostkarma.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
24359(total number of domains tested, including 98 at SDSC)
21280hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4200hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3548(union of most domain zones)
2713hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2306dbl.spamhaus.org (union of all results)
2301dbl.spamhaus.org (result 127.0.1.2 = spam source)
2123hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2016hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1648multi.surbl.org
1601hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1288multi.uribl.com (union of all results)
1271multi.uribl.com (result 127.0.0.2 = spam resource)
757fresh.spameatingmonkey.net
733dob.sibl.support-intelligence.net
555l1.apews.org
263hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
224urired.spameatingmonkey.net
24hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
19hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
17hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
17rhsbl.ahbl.org
16multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8ex.dnsbl.org
5dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 28 October 2012.