Blacklists Compared

25 May 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
72804(total number of IP addresses tested, including 151 at SDSC)
67808(union of most IP zones)
58582b.barracudacentral.org
58205zen.spamhaus.org (union of all results)
57857l2.apews.org
52387cbl.abuseat.org
52377zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
49769bl.tiopan.com
43695bl.mailspike.net (union of all results)
42405spam.dnsbl.sorbs.net
42384hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
38059dnsbl-1.uceprotect.net
37259zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
37102hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
32038dnsbl.sorbs.net (union of all results)
30766psbl.surriel.com
30152db.wpbl.info
25750bl.mailspike.net (result 127.0.0.12 = bad reputation)
25071bl.spameatingmonkey.net
23986all.spamrats.com (union of all results)
23326dnsbl-2.uceprotect.net
22392dnsbl-3.uceprotect.net
19658dnsbl.inps.de
19166ubl.unsubscore.com
18161truncate.gbudb.net
17070dnsbl.sorbs.net (result 127.0.0.6 = spam source)
16065all.spamrats.com (result 127.0.0.36 = dialup)
14600dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
13223dnsbl.sorbs.net (result 127.0.0.10 = dialup)
12545wl.mailspike.net (union of all results) (not a blacklist!)
11851bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
10993bl.score.senderscore.com
9567wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
9174bl.spamcop.net
7955ips.backscatterer.org
7662all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
6883zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6432list.dnswl.org (not a blacklist!)
5675bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
4771bl.mailspike.net (result 127.0.0.11 = very bad reputation)
4487ix.dnsbl.manitu.net
3463hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3286hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3248bl.mav.com.br
2922wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2840hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1753all.s5h.net
1706tr.countries.nerd.dk
1630bl.spamcannibal.org
1515hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1384free.v4bl.org
1354spamsources.fabel.dk
1261zen.spamhaus.org (union of SBL and SBLCSS results)
751accredit.habeas.com (not a blacklist!)
692zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
617query.bondedsender.org (not a blacklist!)
569zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
554mail-abuse.blacklist.jippg.org
447korea.services.net
332all.spamrats.com (result 127.0.0.38 = spam source)
285hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
239l2.bbfh.ext.sorbs.net
206iadb.isipp.com (not a blacklist!)
173dnsbl.ahbl.org (union of all results)
130dnsbl.ahbl.org (result 127.0.0.4 = spam source)
94iadb2.isipp.com (not a blacklist!)
56wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
56dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
56dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
56dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
51tor.dnsbl.sectoor.de (union of all results)
49tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
22dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
21dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
10dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
6dnsbl-0.uceprotect.net
4multi.surbl.org
4hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4spamguard.leadmon.net (union of all results)
3spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2multi.uribl.com (union of all results)
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
72804(total number of IP addresses whose names were tested, including 151 at SDSC)
44589hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
34274hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
22829l1.apews.org
6622hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2951(union of most domain zones)
2713hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
986dbl.spamhaus.org (result 127.0.1.2 = spam source)
986dbl.spamhaus.org (union of all results)
949hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
942hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
436hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
222hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
102hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
90multi.uribl.com (result 127.0.0.2 = spam resource)
90multi.uribl.com (union of all results)
80multi.surbl.org
53dob.sibl.support-intelligence.net
39rhsbl.ahbl.org
21fresh.spameatingmonkey.net
20urired.spameatingmonkey.net
10hostkarma.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
58323(total number of domains tested, including 107 at SDSC)
49560hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3562hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3285(union of most domain zones)
2277dbl.spamhaus.org (union of all results)
2275dbl.spamhaus.org (result 127.0.1.2 = spam source)
2033hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1666hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1435hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1433multi.uribl.com (union of all results)
1418multi.uribl.com (result 127.0.0.2 = spam resource)
1366multi.surbl.org
1251hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
545l1.apews.org
481dob.sibl.support-intelligence.net
225hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
64urired.spameatingmonkey.net
36rhsbl.ahbl.org
24fresh.spameatingmonkey.net
16hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
14multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
11hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
10hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
4ex.dnsbl.org
2dbl.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 27 May 2013.