Blacklists Compared

12 July 2014

[ 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
33676(total number of IP addresses tested, including 134 at SDSC)
29406(union of most IP zones)
22585b.barracudacentral.org
22063l2.apews.org
20466zen.spamhaus.org (union of all results)
18251cbl.abuseat.org
18244zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
16482hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
16322ubl.unsubscore.com
15323hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
13589spam.dnsbl.sorbs.net
13044zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
12871dnsbl-1.uceprotect.net
12628all.s5h.net
10485bl.tiopan.com
8356all.spamrats.com (union of all results)
7175dnsbl-2.uceprotect.net
6909dnsbl.sorbs.net (union of all results)
6438db.wpbl.info
6400psbl.surriel.com
6139list.dnswl.org (not a blacklist!)
6109truncate.gbudb.net
5776dnsbl.inps.de
5465wl.mailspike.net (union of all results) (not a blacklist!)
5393dnsbl-3.uceprotect.net
4826bl.mailspike.net (union of all results)
4695all.spamrats.com (result 127.0.0.36 = dialup)
3756bl.spameatingmonkey.net
3312dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3230all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3091hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2868wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2670dnsbl.sorbs.net (result 127.0.0.10 = dialup)
2565hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2560bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
2501ips.backscatterer.org
2437bl.spamcop.net
2027hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1970dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1733zen.spamhaus.org (union of SBL and SBLCSS results)
1649bl.spamcannibal.org
1576bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1442wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1419hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1393ix.dnsbl.manitu.net
1392zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1080zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
1011spamsources.fabel.dk
1009wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
905bl.score.senderscore.com
734accredit.habeas.com (not a blacklist!)
661query.bondedsender.org (not a blacklist!)
655free.v4bl.org
653zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
607korea.services.net
552bl.mailspike.net (result 127.0.0.12 = bad reputation)
477bl.mailspike.net (result 127.0.0.11 = very bad reputation)
451all.spamrats.com (result 127.0.0.38 = spam source)
331mail-abuse.blacklist.jippg.org
213tr.countries.nerd.dk
146wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
144iadb.isipp.com (not a blacklist!)
87hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
86dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
86dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
86dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
78iadb2.isipp.com (not a blacklist!)
37bl.mav.com.br
36tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
36tor.dnsbl.sectoor.de (union of all results)
25multi.uribl.com (result 127.0.0.2 = spam resource)
25multi.uribl.com (union of all results)
11spamguard.leadmon.net (union of all results)
10spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
8dnsbl-0.uceprotect.net
6dnsbl.sorbs.net (result 127.0.0.5 = open relay)
3multi.surbl.org
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
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
33676(total number of IP addresses whose names were tested, including 134 at SDSC)
17993hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
13921hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4731l1.apews.org
2300hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2196hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1855(union of most domain zones)
949dbl.spamhaus.org (result 127.0.1.2 = spam source)
949dbl.spamhaus.org (union of all results)
912hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
492hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
365hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
178hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
99hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
88fresh.spameatingmonkey.net
87dob.sibl.support-intelligence.net
79multi.surbl.org
73multi.uribl.com (union of all results)
72multi.uribl.com (result 127.0.0.2 = spam resource)
32hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
26urired.spameatingmonkey.net
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
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
31119(total number of domains tested, including 84 at SDSC)
13850hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6229(union of most domain zones)
5052dbl.spamhaus.org (union of all results)
5050dbl.spamhaus.org (result 127.0.1.2 = spam source)
4897hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
4305hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
3220hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2265multi.uribl.com (union of all results)
2251multi.uribl.com (result 127.0.0.2 = spam resource)
2239multi.surbl.org
2104dob.sibl.support-intelligence.net
2090fresh.spameatingmonkey.net
1280hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1213hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
428l1.apews.org
173hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
137hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
57urired.spameatingmonkey.net
24hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
11hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
8multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
6multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
6ex.dnsbl.org
1dbl.spamhaus.org (result 127.0.1.103 = abused legitimate domain redirects to spammer)
1dbl.spamhaus.org (result 127.0.1.4 = phish domain)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 14 July 2014.