Blacklists Compared

10 August 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
81496(total number of IP addresses tested, including 153 at SDSC)
76406(union of most IP zones)
67410zen.spamhaus.org (union of all results)
66823l2.apews.org
66160b.barracudacentral.org
59564cbl.abuseat.org
59547zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
57976bl.tiopan.com
53997spam.dnsbl.sorbs.net
45993bl.mailspike.net (union of all results)
45578hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
45494zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
39299dnsbl-1.uceprotect.net
38434psbl.surriel.com
37289dnsbl.sorbs.net (union of all results)
37266db.wpbl.info
34706hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
30681bl.spameatingmonkey.net
29510bl.mailspike.net (result 127.0.0.12 = bad reputation)
27314dnsbl.inps.de
26611all.spamrats.com (union of all results)
26396dnsbl-3.uceprotect.net
25887dnsbl-2.uceprotect.net
25274truncate.gbudb.net
21698ips.backscatterer.org
20560ubl.unsubscore.com
20284dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
17773dnsbl.sorbs.net (result 127.0.0.6 = spam source)
17609all.spamrats.com (result 127.0.0.36 = dialup)
15179bl.score.senderscore.com
14871dnsbl.sorbs.net (result 127.0.0.10 = dialup)
13158bl.spamcop.net
9983bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
8789all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
7143zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
7105ix.dnsbl.manitu.net
6160list.dnswl.org (not a blacklist!)
6144hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5544wl.mailspike.net (union of all results) (not a blacklist!)
4911bl.mailspike.net (result 127.0.0.11 = very bad reputation)
4854bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
3877all.s5h.net
3464wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3311hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2549hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2228hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1737bl.spamcannibal.org
1727spamsources.fabel.dk
1653zen.spamhaus.org (union of SBL and SBLCSS results)
1592free.v4bl.org
1417wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1202zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
981tr.countries.nerd.dk
941mail-abuse.blacklist.jippg.org
770accredit.habeas.com (not a blacklist!)
663query.bondedsender.org (not a blacklist!)
578wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
451zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
427korea.services.net
398hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
308all.spamrats.com (result 127.0.0.38 = spam source)
238bl.mav.com.br
150dnsbl.ahbl.org (union of all results)
147iadb.isipp.com (not a blacklist!)
125dnsbl.ahbl.org (result 127.0.0.4 = spam source)
87iadb2.isipp.com (not a blacklist!)
85wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
67dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
67dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
67dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
39tor.dnsbl.sectoor.de (union of all results)
35tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
25dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
11dnsbl-0.uceprotect.net
9dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
5hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4wadb.isipp.com
4tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
4multi.surbl.org
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
81496(total number of IP addresses whose names were tested, including 153 at SDSC)
46791hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
36266hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
24580l1.apews.org
6452hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3109(union of most domain zones)
2556hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1305hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1160dbl.spamhaus.org (union of all results)
1159dbl.spamhaus.org (result 127.0.1.2 = spam source)
979hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
353hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
301hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
268hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
154fresh.spameatingmonkey.net
119multi.surbl.org
119dob.sibl.support-intelligence.net
69rhsbl.ahbl.org
20urired.spameatingmonkey.net
14hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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
69756(total number of domains tested, including 108 at SDSC)
62164hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3570(union of most domain zones)
3204hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2649hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2282dbl.spamhaus.org (union of all results)
2281dbl.spamhaus.org (result 127.0.1.2 = spam source)
1763multi.surbl.org
1602hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1437hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1311hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
577dob.sibl.support-intelligence.net
523fresh.spameatingmonkey.net
359l1.apews.org
267hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
200hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
55urired.spameatingmonkey.net
41rhsbl.ahbl.org
35hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 13 August 2013.