Blacklists Compared

30 March 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, l2.apews.org, and ip.v4bl.org zones are also excluded from the union.

HitsDNS Zone
106670(total number of IP addresses tested, including 144 at SDSC)
101737(union of most IP zones)
90099b.barracudacentral.org
89229ip.v4bl.org
88312zen.spamhaus.org (union of all results)
84722zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
84438bl.mailspike.net (union of all results)
84208cbl.abuseat.org
79154bl.tiopan.com
72804bl.mailspike.net (result 127.0.0.12 = bad reputation)
67323dnsbl-1.uceprotect.net
65190zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
64169hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
63284spam.dnsbl.sorbs.net
54853psbl.surriel.com
53748dnsbl.sorbs.net (union of all results)
52997db.wpbl.info
52935dnsbl.inps.de
46117dnsbl-2.uceprotect.net
46115dnsbl-3.uceprotect.net
40979ubl.unsubscore.com
39599bl.spameatingmonkey.net
35019all.spamrats.com (union of all results)
32954hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
29619dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
28051truncate.gbudb.net
22051dnsbl.sorbs.net (result 127.0.0.6 = spam source)
21248dnsbl.sorbs.net (result 127.0.0.10 = dialup)
21099all.spamrats.com (result 127.0.0.36 = dialup)
14885free.v4bl.org
13587all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
13262bl.spamcop.net
10225hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
10030bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
8597bl.score.senderscore.com
8378ips.backscatterer.org
8024ix.dnsbl.manitu.net
7847bl.mailspike.net (result 127.0.0.11 = very bad reputation)
7718zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
7640wl.mailspike.net (union of all results) (not a blacklist!)
6889list.dnswl.org (not a blacklist!)
5657all.s5h.net
5239bl.mav.com.br
4995wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3412mail-abuse.blacklist.jippg.org
3410hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3047hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2943bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
2325bl.spamcannibal.org
2170wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1820hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1609spamsources.fabel.dk
1041zen.spamhaus.org (union of SBL and SBLCSS results)
873tr.countries.nerd.dk
709accredit.habeas.com (not a blacklist!)
698zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
653korea.services.net
591query.bondedsender.org (not a blacklist!)
458all.spamrats.com (result 127.0.0.38 = spam source)
368wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
343zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
286l2.bbfh.ext.sorbs.net
229dnsbl.ahbl.org (union of all results)
201iadb.isipp.com (not a blacklist!)
174dnsbl.ahbl.org (result 127.0.0.4 = spam source)
124hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
124iadb2.isipp.com (not a blacklist!)
107wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
74tor.dnsbl.sectoor.de (union of all results)
71tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
59dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
59dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
59dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
41dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
19dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
14dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
6dnsbl-0.uceprotect.net
4multi.surbl.org
4hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4spamguard.leadmon.net (union of all results)
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1wadb.isipp.com
1multi.uribl.com (result 127.0.0.2 = spam resource)
1multi.uribl.com (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
106670(total number of IP addresses whose names were tested, including 144 at SDSC)
56984hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
44180hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6451hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3083(union of most domain zones)
2962hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1118hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
856hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
657dbl.spamhaus.org (union of all results)
655dbl.spamhaus.org (result 127.0.1.2 = spam source)
650hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
213hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
164urired.spameatingmonkey.net
121hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
53multi.surbl.org
50multi.uribl.com (result 127.0.0.2 = spam resource)
50dob.sibl.support-intelligence.net
50multi.uribl.com (union of all results)
45fresh.spameatingmonkey.net
22rhsbl.ahbl.org
17hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2dbl.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
81551(total number of domains tested, including 106 at SDSC)
64666hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
11789hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
8810(union of most domain zones)
7873hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
5264hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3687hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3051hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2223dbl.spamhaus.org (union of all results)
2218dbl.spamhaus.org (result 127.0.1.2 = spam source)
1796multi.surbl.org
1438multi.uribl.com (union of all results)
1423multi.uribl.com (result 127.0.0.2 = spam resource)
511dob.sibl.support-intelligence.net
412fresh.spameatingmonkey.net
379hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
84urired.spameatingmonkey.net
49hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
25hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
21rhsbl.ahbl.org
13multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
9ex.dnsbl.org
5dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
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 2 April 2013.