Blacklists Compared

27 July 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
82118(total number of IP addresses tested, including 147 at SDSC)
77251(union of most IP zones)
69694b.barracudacentral.org
68950zen.spamhaus.org (union of all results)
68161l2.apews.org
63441cbl.abuseat.org
63432zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
59125bl.tiopan.com
51885spam.dnsbl.sorbs.net
48918dnsbl-1.uceprotect.net
47497hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
45679zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
43978bl.mailspike.net (union of all results)
42729psbl.surriel.com
39559hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
36395dnsbl.sorbs.net (union of all results)
36296db.wpbl.info
31848bl.spameatingmonkey.net
30169dnsbl-2.uceprotect.net
29235dnsbl-3.uceprotect.net
28092bl.mailspike.net (result 127.0.0.12 = bad reputation)
27383all.spamrats.com (union of all results)
26210dnsbl.inps.de
26097ubl.unsubscore.com
20915dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
18159all.spamrats.com (result 127.0.0.36 = dialup)
17419truncate.gbudb.net
16005bl.score.senderscore.com
15414dnsbl.sorbs.net (result 127.0.0.6 = spam source)
14478dnsbl.sorbs.net (result 127.0.0.10 = dialup)
13264bl.spamcop.net
12398bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
10902ips.backscatterer.org
8977all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
7350zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
7040ix.dnsbl.manitu.net
6155list.dnswl.org (not a blacklist!)
5579wl.mailspike.net (union of all results) (not a blacklist!)
4703bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
4198hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3868all.s5h.net
3480wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3133hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2493hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2169hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1825spamsources.fabel.dk
1686bl.spamcannibal.org
1673bl.mailspike.net (result 127.0.0.11 = very bad reputation)
1666free.v4bl.org
1452wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1445tr.countries.nerd.dk
1384zen.spamhaus.org (union of SBL and SBLCSS results)
933zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
738accredit.habeas.com (not a blacklist!)
669hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
615query.bondedsender.org (not a blacklist!)
568wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
523mail-abuse.blacklist.jippg.org
514korea.services.net
451zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
436bl.mav.com.br
332all.spamrats.com (result 127.0.0.38 = spam source)
168iadb.isipp.com (not a blacklist!)
112dnsbl.ahbl.org (union of all results)
102iadb2.isipp.com (not a blacklist!)
95dnsbl.ahbl.org (result 127.0.0.4 = spam source)
79wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
65dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
65dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
65dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
44tor.dnsbl.sectoor.de (union of all results)
42tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
17dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
12dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
7multi.surbl.org
6wadb.isipp.com
5dnsbl-0.uceprotect.net
3hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2l2.bbfh.ext.sorbs.net
2spamguard.leadmon.net (union of all results)
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
82118(total number of IP addresses whose names were tested, including 147 at SDSC)
47039hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
37340hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
25727l1.apews.org
6840hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2721(union of most domain zones)
2404hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1006hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
986dbl.spamhaus.org (union of all results)
985dbl.spamhaus.org (result 127.0.1.2 = spam source)
898hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
322hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
273hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
139fresh.spameatingmonkey.net
131hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
121multi.surbl.org
115dob.sibl.support-intelligence.net
45rhsbl.ahbl.org
23urired.spameatingmonkey.net
19hostkarma.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
79522(total number of domains tested, including 101 at SDSC)
69696hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3336hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3023(union of most domain zones)
2119hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2011dbl.spamhaus.org (union of all results)
2009dbl.spamhaus.org (result 127.0.1.2 = spam source)
1499multi.surbl.org
1486hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1348hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1070hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
578dob.sibl.support-intelligence.net
564fresh.spameatingmonkey.net
335l1.apews.org
212hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
40urired.spameatingmonkey.net
40hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
24rhsbl.ahbl.org
23hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
13hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
4ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 29 July 2013.