Blacklists Compared

22 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
53492(total number of IP addresses tested, including 141 at SDSC)
48249(union of most IP zones)
41763b.barracudacentral.org
40463zen.spamhaus.org (union of all results)
38681cbl.abuseat.org
38655zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
36635spam.dnsbl.sorbs.net
34936bl.tiopan.com
33590l2.apews.org
32640ubl.unsubscore.com
32122psbl.surriel.com
31055dnsbl-1.uceprotect.net
30132bl.mailspike.net (union of all results)
28610bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
25410hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
24445hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
23467dnsbl.sorbs.net (union of all results)
22875zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
22358dnsbl.inps.de
22072bl.spameatingmonkey.net
20432db.wpbl.info
14854dnsbl.sorbs.net (result 127.0.0.6 = spam source)
14049truncate.gbudb.net
13245bl.spamcop.net
13151all.spamrats.com (union of all results)
10005dnsbl-2.uceprotect.net
9548all.spamrats.com (result 127.0.0.36 = dialup)
9246dnsbl.sorbs.net (result 127.0.0.10 = dialup)
8779dnsbl-3.uceprotect.net
7502ix.dnsbl.manitu.net
7023dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6351bl.score.senderscore.com
6156list.dnswl.org (not a blacklist!)
5342wl.mailspike.net (union of all results) (not a blacklist!)
5123zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4409ips.backscatterer.org
3603hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3311all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3123hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3083wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2444hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1953all.s5h.net
1619bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1591hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1490wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1475zen.spamhaus.org (union of SBL and SBLCSS results)
1017spamsources.fabel.dk
1014bl.spamcannibal.org
852korea.services.net
769zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
756accredit.habeas.com (not a blacklist!)
742tr.countries.nerd.dk
716wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
706zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
677query.bondedsender.org (not a blacklist!)
558bl.mailspike.net (result 127.0.0.11 = very bad reputation)
492bl.mailspike.net (result 127.0.0.12 = bad reputation)
491hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
336all.spamrats.com (result 127.0.0.38 = spam source)
243mail-abuse.blacklist.jippg.org
239free.v4bl.org
178iadb.isipp.com (not a blacklist!)
96dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
96dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
96dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
94bl.mav.com.br
77iadb2.isipp.com (not a blacklist!)
58tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
58tor.dnsbl.sectoor.de (union of all results)
54wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
52dnsbl.ahbl.org (union of all results)
46dnsbl.ahbl.org (result 127.0.0.4 = spam source)
20multi.uribl.com (result 127.0.0.2 = spam resource)
20multi.uribl.com (union of all results)
9multi.surbl.org
8dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
6dnsbl-0.uceprotect.net
6dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
3spamguard.leadmon.net (union of all results)
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1wadb.isipp.com
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
53492(total number of IP addresses whose names were tested, including 141 at SDSC)
35264hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
29392hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14603l1.apews.org
4098hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2496hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2213(union of most domain zones)
859hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
796hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
597dbl.spamhaus.org (result 127.0.1.2 = spam source)
597dbl.spamhaus.org (union of all results)
287hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
227hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
100hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
66multi.surbl.org
57fresh.spameatingmonkey.net
56hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
48multi.uribl.com (result 127.0.0.2 = spam resource)
48multi.uribl.com (union of all results)
43dob.sibl.support-intelligence.net
24rhsbl.ahbl.org
9urired.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
41374(total number of domains tested, including 97 at SDSC)
35128hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4669hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3993(union of most domain zones)
2740hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2639dbl.spamhaus.org (union of all results)
2638dbl.spamhaus.org (result 127.0.1.2 = spam source)
1921hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1648hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1641hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1543multi.uribl.com (union of all results)
1528multi.uribl.com (result 127.0.0.2 = spam resource)
1446multi.surbl.org
946l1.apews.org
394dob.sibl.support-intelligence.net
323fresh.spameatingmonkey.net
210hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
41urired.spameatingmonkey.net
35hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
30hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
22rhsbl.ahbl.org
18hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
14multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
4ex.dnsbl.org
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 25 March 2014.