Blacklists Compared

14 September 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
72375(total number of IP addresses tested, including 148 at SDSC)
67418(union of most IP zones)
59456b.barracudacentral.org
58285zen.spamhaus.org (union of all results)
57732l2.apews.org
51205cbl.abuseat.org
51193zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
50572bl.tiopan.com
47154hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
46726spam.dnsbl.sorbs.net
44122dnsbl-1.uceprotect.net
43990hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
39321psbl.surriel.com
37161zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
34268bl.mailspike.net (union of all results)
31151db.wpbl.info
30847dnsbl.sorbs.net (union of all results)
28912ubl.unsubscore.com
23585bl.spameatingmonkey.net
22956all.spamrats.com (union of all results)
22880dnsbl-2.uceprotect.net
21474dnsbl.inps.de
21334dnsbl-3.uceprotect.net
17531bl.mailspike.net (result 127.0.0.12 = bad reputation)
17004dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
15637all.spamrats.com (result 127.0.0.36 = dialup)
13852dnsbl.sorbs.net (result 127.0.0.6 = spam source)
11949truncate.gbudb.net
11933dnsbl.sorbs.net (result 127.0.0.10 = dialup)
11903bl.spamcop.net
11686bl.mailspike.net (result 127.0.0.11 = very bad reputation)
7917ips.backscatterer.org
7579ix.dnsbl.manitu.net
6945all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
6310zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6208list.dnswl.org (not a blacklist!)
4994wl.mailspike.net (union of all results) (not a blacklist!)
4786bl.score.senderscore.com
3815bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
3461bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
3400hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3378hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3217wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3128all.s5h.net
2738hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2471hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1742zen.spamhaus.org (union of SBL and SBLCSS results)
1635bl.spamcannibal.org
1473spamsources.fabel.dk
1399free.v4bl.org
1356wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1079tr.countries.nerd.dk
1024zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
742accredit.habeas.com (not a blacklist!)
718zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
627query.bondedsender.org (not a blacklist!)
494mail-abuse.blacklist.jippg.org
457all.spamrats.com (result 127.0.0.38 = spam source)
361wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
296korea.services.net
167iadb.isipp.com (not a blacklist!)
161hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
134bl.mav.com.br
110iadb2.isipp.com (not a blacklist!)
102dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
102dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
102dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
96dnsbl.ahbl.org (union of all results)
74dnsbl.ahbl.org (result 127.0.0.4 = spam source)
60tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
60wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
60tor.dnsbl.sectoor.de (union of all results)
22dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
5dnsbl-0.uceprotect.net
5multi.surbl.org
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3wadb.isipp.com
3hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3spamguard.leadmon.net (union of all results)
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
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
72375(total number of IP addresses whose names were tested, including 148 at SDSC)
43172hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
34528hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
22545l1.apews.org
6126hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2845(union of most domain zones)
2537hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1005hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
997dbl.spamhaus.org (result 127.0.1.2 = spam source)
997dbl.spamhaus.org (union of all results)
995hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
421hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
324hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
152fresh.spameatingmonkey.net
134hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
105multi.surbl.org
94dob.sibl.support-intelligence.net
65rhsbl.ahbl.org
38hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
21urired.spameatingmonkey.net
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
22270(total number of domains tested, including 114 at SDSC)
15678hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4977hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4370(union of most domain zones)
3184hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
3038hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2395dbl.spamhaus.org (union of all results)
2394dbl.spamhaus.org (result 127.0.1.2 = spam source)
1471hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1376hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
984multi.surbl.org
976l1.apews.org
964dob.sibl.support-intelligence.net
924fresh.spameatingmonkey.net
243hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
54hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
51urired.spameatingmonkey.net
35rhsbl.ahbl.org
19hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
14hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
5ex.dnsbl.org
4hostkarma.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 16 September 2013.