Blacklists Compared

15 March 2014

[ 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
54710(total number of IP addresses tested, including 154 at SDSC)
49292(union of most IP zones)
42529b.barracudacentral.org
41520zen.spamhaus.org (union of all results)
39715cbl.abuseat.org
39643zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
38523spam.dnsbl.sorbs.net
37812l2.apews.org
35991bl.tiopan.com
35655ubl.unsubscore.com
34009psbl.surriel.com
33115dnsbl-1.uceprotect.net
32249bl.mailspike.net (union of all results)
30944bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
26858hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
25429hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
24246dnsbl.sorbs.net (union of all results)
23824dnsbl.inps.de
23006zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
22981bl.spameatingmonkey.net
19477db.wpbl.info
15175dnsbl.sorbs.net (result 127.0.0.6 = spam source)
14229truncate.gbudb.net
13431bl.spamcop.net
13331all.spamrats.com (union of all results)
11277dnsbl-2.uceprotect.net
10986dnsbl-3.uceprotect.net
9847all.spamrats.com (result 127.0.0.36 = dialup)
9515dnsbl.sorbs.net (result 127.0.0.10 = dialup)
8476ix.dnsbl.manitu.net
7807bl.score.senderscore.com
7331dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6159list.dnswl.org (not a blacklist!)
5285zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5208wl.mailspike.net (union of all results) (not a blacklist!)
4421ips.backscatterer.org
3613hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3374wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3221all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3221hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2459hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1785hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1713bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1699all.s5h.net
1601zen.spamhaus.org (union of SBL and SBLCSS results)
1571wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
988zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
988bl.spamcannibal.org
901spamsources.fabel.dk
883korea.services.net
760tr.countries.nerd.dk
748accredit.habeas.com (not a blacklist!)
681query.bondedsender.org (not a blacklist!)
613zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
502bl.mailspike.net (result 127.0.0.12 = bad reputation)
483hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
428mail-abuse.blacklist.jippg.org
361bl.mailspike.net (result 127.0.0.11 = very bad reputation)
311all.spamrats.com (result 127.0.0.38 = spam source)
308free.v4bl.org
229wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
173iadb.isipp.com (not a blacklist!)
101bl.mav.com.br
91iadb2.isipp.com (not a blacklist!)
83dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
83dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
83dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
48dnsbl.ahbl.org (union of all results)
41tor.dnsbl.sectoor.de (union of all results)
40tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
38dnsbl.ahbl.org (result 127.0.0.4 = spam source)
35wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
11multi.uribl.com (union of all results)
10multi.uribl.com (result 127.0.0.2 = spam resource)
10dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
9spamguard.leadmon.net (union of all results)
8spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
7dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
6dnsbl-0.uceprotect.net
5multi.surbl.org
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor 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
54710(total number of IP addresses whose names were tested, including 154 at SDSC)
36663hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
30796hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16047l1.apews.org
4335hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2496hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2344(union of most domain zones)
886hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
820hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
707dbl.spamhaus.org (result 127.0.1.2 = spam source)
707dbl.spamhaus.org (union of all results)
371hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
246hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
121hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
74multi.surbl.org
60multi.uribl.com (result 127.0.0.2 = spam resource)
60multi.uribl.com (union of all results)
50fresh.spameatingmonkey.net
46hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
33rhsbl.ahbl.org
32dob.sibl.support-intelligence.net
16urired.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
39911(total number of domains tested, including 110 at SDSC)
35566hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4930hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3931(union of most domain zones)
2864hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2581dbl.spamhaus.org (result 127.0.1.2 = spam source)
2581dbl.spamhaus.org (union of all results)
1697hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1595hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1588hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1291multi.surbl.org
1100multi.uribl.com (union of all results)
1085multi.uribl.com (result 127.0.0.2 = spam resource)
981l1.apews.org
327dob.sibl.support-intelligence.net
310fresh.spameatingmonkey.net
218hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
102urired.spameatingmonkey.net
38hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
34rhsbl.ahbl.org
28hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
16hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
13multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
4ex.dnsbl.org
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 18 March 2014.