Blacklists Compared

14 June 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
32250(total number of IP addresses tested, including 136 at SDSC)
27668(union of most IP zones)
20566b.barracudacentral.org
18537zen.spamhaus.org (union of all results)
17100l2.apews.org
16397zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
16396cbl.abuseat.org
15890ubl.unsubscore.com
14536hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
13088spam.dnsbl.sorbs.net
12469all.s5h.net
12201zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
11893dnsbl-1.uceprotect.net
10851hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
10814bl.tiopan.com
8060dnsbl-2.uceprotect.net
7924all.spamrats.com (union of all results)
7631db.wpbl.info
6903dnsbl.sorbs.net (union of all results)
6446dnsbl.inps.de
6239list.dnswl.org (not a blacklist!)
6157psbl.surriel.com
6081bl.mailspike.net (union of all results)
5426dnsbl-3.uceprotect.net
5377ips.backscatterer.org
5376wl.mailspike.net (union of all results) (not a blacklist!)
5087truncate.gbudb.net
4429all.spamrats.com (result 127.0.0.36 = dialup)
3956bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
3873bl.spameatingmonkey.net
3322dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3192hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3148all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
2927wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2780hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2586hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2523dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2516dnsbl.sorbs.net (result 127.0.0.10 = dialup)
2292bl.spamcop.net
2176hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1783bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1644zen.spamhaus.org (union of SBL and SBLCSS results)
1478wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1451bl.spamcannibal.org
1256ix.dnsbl.manitu.net
1251zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
881zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
872wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
839bl.score.senderscore.com
785accredit.habeas.com (not a blacklist!)
763zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
711query.bondedsender.org (not a blacklist!)
681spamsources.fabel.dk
599free.v4bl.org
481bl.mailspike.net (result 127.0.0.11 = very bad reputation)
481bl.mailspike.net (result 127.0.0.12 = bad reputation)
446korea.services.net
374all.spamrats.com (result 127.0.0.38 = spam source)
293mail-abuse.blacklist.jippg.org
188tr.countries.nerd.dk
171iadb.isipp.com (not a blacklist!)
99wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
84dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
84dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
84dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
81iadb2.isipp.com (not a blacklist!)
73hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
64bl.mav.com.br
27tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
27tor.dnsbl.sectoor.de (union of all results)
13multi.uribl.com (result 127.0.0.2 = spam resource)
13multi.uribl.com (union of all results)
7multi.surbl.org
6dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2dnsbl-0.uceprotect.net
2spamguard.leadmon.net (union of all results)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
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
32250(total number of IP addresses whose names were tested, including 136 at SDSC)
17998hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
13690hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3668l1.apews.org
2307hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2301hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1712(union of most domain zones)
818hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
750dbl.spamhaus.org (result 127.0.1.2 = spam source)
750dbl.spamhaus.org (union of all results)
498hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
350hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
116dob.sibl.support-intelligence.net
114fresh.spameatingmonkey.net
88hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
88hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
77multi.surbl.org
59multi.uribl.com (result 127.0.0.2 = spam resource)
59multi.uribl.com (union of all results)
40hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
18urired.spameatingmonkey.net
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
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
25555(total number of domains tested, including 99 at SDSC)
12032hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5409(union of most domain zones)
3933hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
3853dbl.spamhaus.org (result 127.0.1.2 = spam source)
3853dbl.spamhaus.org (union of all results)
3151hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2935hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2278multi.surbl.org
2139multi.uribl.com (union of all results)
2127multi.uribl.com (result 127.0.0.2 = spam resource)
1308hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1193hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1150fresh.spameatingmonkey.net
1105dob.sibl.support-intelligence.net
391urired.spameatingmonkey.net
242l1.apews.org
187hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
36hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
22hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
5ex.dnsbl.org
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 16 June 2014.