Blacklists Compared

8 January 2011

[ 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
54066(total number of IP addresses tested, including 163 at SDSC)
50845(union of most IP zones)
42824b.barracudacentral.org
42177l2.apews.org
41842zen.spamhaus.org (union of all results)
41003zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
40996cbl.abuseat.org
31677hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
30661bl.mailspike.net (union of all results)
30375dnsbl-1.uceprotect.net
29438zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
27641dnsbl-2.uceprotect.net
27121dnsbl-3.uceprotect.net
25964bl.tiopan.com
24696bl.spameatingmonkey.net
22175psbl.surriel.com
20894ubl.unsubscore.com
20462spam.dnsbl.sorbs.net
18955blackholes.five-ten-sg.com (union of all results)
16395hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
13218bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
12904bl.mailspike.net (result 127.0.0.11 = very bad reputation)
11848bl.score.senderscore.com
10052db.wpbl.info
9557blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
9552dnsbl.sorbs.net (union of all results)
8500bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
8444bl.spamcop.net
8153blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6992dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6316bl.mailspike.net (result 127.0.0.12 = bad reputation)
5649hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5384no-more-funn.moensted.dk (union of all results)
5096list.dnswl.org (not a blacklist!)
4324ix.dnsbl.manitu.net
4050zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3667ips.backscatterer.org
3280hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3272no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
3255dnsbl.inps.de
2961wl.mailspike.net (union of all results) (not a blacklist!)
2806wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2089hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1972no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1835mail-abuse.blacklist.jippg.org
1730dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1476bl.spamcannibal.org
1223blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1202spamsources.fabel.dk
906korea.services.net
906hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
870dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
631dnsbl.njabl.org (union of all results)
599accredit.habeas.com (not a blacklist!)
517query.bondedsender.org (not a blacklist!)
510dnsbl.njabl.org (result 127.0.0.9 = open proxy)
491l2.bbfh.ext.sorbs.net
403aspews.ext.sorbs.net
278tr.countries.nerd.dk
255zen.spamhaus.org (union of SBL and SBLCSS results)
253zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
253l1.bbfh.ext.sorbs.net
166dnsbl.ahbl.org (union of all results)
143iadb2.isipp.com (not a blacklist!)
134wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
116iadb.isipp.com (not a blacklist!)
109dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
109dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
109dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
106hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
95dnsbl.njabl.org (result 127.0.0.2 = open relay)
92dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
77no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
57dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
46no-more-funn.moensted.dk (result 127.0.0.9 = misc)
40no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
34tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
34tor.dnsbl.sectoor.de (union of all results)
26dnsbl.njabl.org (result 127.0.0.4 = spam source)
21wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
21blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
18swl.spamhaus.org (union of all results) (not a blacklist!)
17hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
17dnsbl.ahbl.org (result 127.0.0.4 = spam source)
15multi.surbl.org
11swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
9bl.deadbeef.com
7swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
6dnsbl-0.uceprotect.net
4spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
4spamguard.leadmon.net (union of all results)
3zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
2zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
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
54066(total number of IP addresses whose names were tested, including 163 at SDSC)
32952hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
26936hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
23152(union of most domain zones)
19736abuse.rfc-ignorant.org
17331l1.apews.org
6714whois.rfc-ignorant.org (union of all results)
4492whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3662hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3461hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2222whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
745hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
325dbl.spamhaus.org
256hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
254urired.spameatingmonkey.net
127hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
110hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
62hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
44postmaster.rfc-ignorant.org
42rhsbl.ahbl.org
39multi.surbl.org
31dsn.rfc-ignorant.org (zone not intended for this use)
30bogusmx.rfc-ignorant.org
29fresh.spameatingmonkey.net
28dob.sibl.support-intelligence.net
12multi.uribl.com (result 127.0.0.2 = spam resource)
12multi.uribl.com (union of all results)
10hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
3bl.deadbeef.com
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
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
23163(total number of domains tested, including 136 at SDSC)
20457hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6486(union of most domain zones)
4071hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2994whois.rfc-ignorant.org (union of all results)
2823whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2646hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2457hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1675abuse.rfc-ignorant.org
893postmaster.rfc-ignorant.org
770urired.spameatingmonkey.net
749hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
738l1.apews.org
694dbl.spamhaus.org
551multi.surbl.org
530hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
507multi.uribl.com (union of all results)
499multi.uribl.com (result 127.0.0.2 = spam resource)
439bogusmx.rfc-ignorant.org
436hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
267dsn.rfc-ignorant.org
171whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
38fresh.spameatingmonkey.net
35dob.sibl.support-intelligence.net
18hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11rhsbl.ahbl.org
7multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
7hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
6ex.dnsbl.org
4hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 12 January 2011.