Blacklists Compared

14 December 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 and l2.apews.org zones are also excluded from the union.

HitsDNS Zone
45220(total number of IP addresses tested, including 142 at SDSC)
39687(union of most IP zones)
33358l2.apews.org
32134zen.spamhaus.org (union of all results)
31982b.barracudacentral.org
29387cbl.abuseat.org
29385zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
27160spam.dnsbl.sorbs.net
24221hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
22933ubl.unsubscore.com
21056bl.tiopan.com
20689bl.mailspike.net (union of all results)
20640zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
20476hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
20425dnsbl-1.uceprotect.net
18952psbl.surriel.com
18787db.wpbl.info
15403dnsbl.sorbs.net (union of all results)
15100bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
12443dnsbl.inps.de
11726bl.spameatingmonkey.net
10941all.spamrats.com (union of all results)
9899dnsbl-2.uceprotect.net
8688dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
7653ips.backscatterer.org
7178all.spamrats.com (result 127.0.0.36 = dialup)
7055dnsbl-3.uceprotect.net
6750bl.spamcop.net
6645truncate.gbudb.net
6359list.dnswl.org (not a blacklist!)
6279dnsbl.sorbs.net (result 127.0.0.10 = dialup)
5506wl.mailspike.net (union of all results) (not a blacklist!)
3702dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3551all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3533bl.mailspike.net (result 127.0.0.11 = very bad reputation)
3410hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3223wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3049zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2999hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2496bl.score.senderscore.com
2460ix.dnsbl.manitu.net
2271hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2244hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1582bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1538bl.mailspike.net (result 127.0.0.12 = bad reputation)
1496wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1308bl.spamcannibal.org
1240zen.spamhaus.org (union of SBL and SBLCSS results)
1068spamsources.fabel.dk
856accredit.habeas.com (not a blacklist!)
836all.s5h.net
758query.bondedsender.org (not a blacklist!)
747bl.mav.com.br
699zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
680wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
566tr.countries.nerd.dk
541zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
469free.v4bl.org
352mail-abuse.blacklist.jippg.org
303korea.services.net
244all.spamrats.com (result 127.0.0.38 = spam source)
203iadb.isipp.com (not a blacklist!)
146hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
131iadb2.isipp.com (not a blacklist!)
107wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
72dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
72dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
72dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
50dnsbl.ahbl.org (union of all results)
40dnsbl.ahbl.org (result 127.0.0.4 = spam source)
25tor.dnsbl.sectoor.de (union of all results)
22tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
9dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
6dnsbl-0.uceprotect.net
6spamguard.leadmon.net (union of all results)
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
3multi.surbl.org
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
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
45220(total number of IP addresses whose names were tested, including 142 at SDSC)
27630hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
22360hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
11494l1.apews.org
3597hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2518hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1793(union of most domain zones)
703dbl.spamhaus.org (result 127.0.1.2 = spam source)
703dbl.spamhaus.org (union of all results)
636hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
490hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
214hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
207hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
85hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
60multi.surbl.org
42rhsbl.ahbl.org
40hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
28fresh.spameatingmonkey.net
19dob.sibl.support-intelligence.net
16urired.spameatingmonkey.net
1hostkarma.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
23156(total number of domains tested, including 90 at SDSC)
17772hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4322hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3076(union of most domain zones)
2179hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2165dbl.spamhaus.org (union of all results)
2164dbl.spamhaus.org (result 127.0.1.2 = spam source)
1820hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1571hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1343hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
988multi.surbl.org
740fresh.spameatingmonkey.net
729l1.apews.org
676dob.sibl.support-intelligence.net
202hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
42hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
42rhsbl.ahbl.org
29hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
26urired.spameatingmonkey.net
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
5ex.dnsbl.org
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 15 December 2013.