Blacklists Compared

24 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
81097(total number of IP addresses tested, including 189 at SDSC)
76198(union of most IP zones)
67410zen.spamhaus.org (union of all results)
66728l2.apews.org
66182b.barracudacentral.org
61593cbl.abuseat.org
61574zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
58498bl.tiopan.com
56227dnsbl-1.uceprotect.net
53796spam.dnsbl.sorbs.net
49111bl.mailspike.net (union of all results)
47933hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
45546zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
44459psbl.surriel.com
40881db.wpbl.info
40836hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
35696dnsbl.sorbs.net (union of all results)
31516dnsbl-2.uceprotect.net
30612bl.spameatingmonkey.net
28738bl.mailspike.net (result 127.0.0.12 = bad reputation)
28324dnsbl-3.uceprotect.net
27473dnsbl.inps.de
26511all.spamrats.com (union of all results)
23793truncate.gbudb.net
19966dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
18054ips.backscatterer.org
17484all.spamrats.com (result 127.0.0.36 = dialup)
16770ubl.unsubscore.com
16328bl.spamcop.net
14768bl.score.senderscore.com
14511dnsbl.sorbs.net (result 127.0.0.10 = dialup)
14054dnsbl.sorbs.net (result 127.0.0.6 = spam source)
12826bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
8789all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
8052ix.dnsbl.manitu.net
6868zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6247bl.mailspike.net (result 127.0.0.11 = very bad reputation)
6100list.dnswl.org (not a blacklist!)
5767hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5549wl.mailspike.net (union of all results) (not a blacklist!)
4831bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
4215all.s5h.net
3433wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3349hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2754hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2068hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1747bl.spamcannibal.org
1738free.v4bl.org
1500spamsources.fabel.dk
1427wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1412zen.spamhaus.org (union of SBL and SBLCSS results)
1224tr.countries.nerd.dk
978mail-abuse.blacklist.jippg.org
812zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
746accredit.habeas.com (not a blacklist!)
620query.bondedsender.org (not a blacklist!)
612wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
600zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
445korea.services.net
389hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
321all.spamrats.com (result 127.0.0.38 = spam source)
190bl.mav.com.br
163iadb.isipp.com (not a blacklist!)
116dnsbl.ahbl.org (union of all results)
99dnsbl.ahbl.org (result 127.0.0.4 = spam source)
93iadb2.isipp.com (not a blacklist!)
77wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
68dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
68dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
68dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
54tor.dnsbl.sectoor.de (union of all results)
53tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
17dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
6dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
5dnsbl-0.uceprotect.net
5multi.surbl.org
3hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2wadb.isipp.com
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1spamguard.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
81097(total number of IP addresses whose names were tested, including 189 at SDSC)
45784hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
35691hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
23979l1.apews.org
6476hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2508hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2505(union of most domain zones)
895hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
881hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
845dbl.spamhaus.org (result 127.0.1.2 = spam source)
845dbl.spamhaus.org (union of all results)
304hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
252hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
194hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
137fresh.spameatingmonkey.net
92multi.surbl.org
86dob.sibl.support-intelligence.net
78rhsbl.ahbl.org
50hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
26urired.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
74054(total number of domains tested, including 150 at SDSC)
66019hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3807(union of most domain zones)
3119hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2654hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2477dbl.spamhaus.org (result 127.0.1.2 = spam source)
2477dbl.spamhaus.org (union of all results)
1761hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1449hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1372multi.surbl.org
1363hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
718fresh.spameatingmonkey.net
561dob.sibl.support-intelligence.net
404l1.apews.org
209hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
50hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
48urired.spameatingmonkey.net
37rhsbl.ahbl.org
28hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
13hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
5ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 26 August 2013.