Blacklists Compared

19 February 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
82673(total number of IP addresses tested, including 156 at SDSC)
79404(union of most IP zones)
70067b.barracudacentral.org
68843zen.spamhaus.org (union of all results)
67806l2.apews.org
67255cbl.abuseat.org
67253zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
56052hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
53937bl.mailspike.net (union of all results)
51583dnsbl-1.uceprotect.net
47011bl.tiopan.com
43788zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
43308psbl.surriel.com
42296bl.spameatingmonkey.net
41011dnsbl-2.uceprotect.net
40535dnsbl-3.uceprotect.net
35964hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
35633bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
34944ddnsbl.internetdefensesystems.com
29364spam.dnsbl.sorbs.net
27146blackholes.five-ten-sg.com (union of all results)
20938bl.mailspike.net (result 127.0.0.11 = very bad reputation)
20480db.wpbl.info
19057dnsbl.sorbs.net (union of all results)
16429bl.spamcop.net
16298ubl.unsubscore.com
15206blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
15142bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
12817dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10570blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
10209ix.dnsbl.manitu.net
9557bl.mailspike.net (result 127.0.0.12 = bad reputation)
9535dnsbl.inps.de
9007zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
8829no-more-funn.moensted.dk (union of all results)
7914mail-abuse.blacklist.jippg.org
6061hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5609no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
5303list.dnswl.org (not a blacklist!)
3612dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3553ips.backscatterer.org
3369hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3332wl.mailspike.net (union of all results) (not a blacklist!)
3160dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3034no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2286hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2236wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1840bl.spamcannibal.org
1630spamsources.fabel.dk
1480korea.services.net
1343blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1089wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1016hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
720dnsbl.njabl.org (union of all results)
615l2.bbfh.ext.sorbs.net
597tr.countries.nerd.dk
591dnsbl.njabl.org (result 127.0.0.9 = open proxy)
580accredit.habeas.com (not a blacklist!)
522query.bondedsender.org (not a blacklist!)
378aspews.ext.sorbs.net
261bl.score.senderscore.com
260zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
260zen.spamhaus.org (union of SBL and SBLCSS results)
253dnsbl.ahbl.org (union of all results)
238l1.bbfh.ext.sorbs.net
192dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
125iadb2.isipp.com (not a blacklist!)
116dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
116dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
116dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
105no-more-funn.moensted.dk (result 127.0.0.9 = misc)
100iadb.isipp.com (not a blacklist!)
95dnsbl.njabl.org (result 127.0.0.2 = open relay)
92no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
88hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
61no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
46tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
46tor.dnsbl.sectoor.de (union of all results)
37dnsbl.ahbl.org (result 127.0.0.4 = spam source)
34dnsbl.njabl.org (result 127.0.0.4 = spam source)
27blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
24dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
21swl.spamhaus.org (union of all results) (not a blacklist!)
17bl.deadbeef.com
13swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
13multi.surbl.org
8zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
8dnsbl-0.uceprotect.net
8swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
7wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
4spamguard.leadmon.net (union of all results)
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
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
82673(total number of IP addresses whose names were tested, including 156 at SDSC)
50241hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
42594hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
36084(union of most domain zones)
30814abuse.rfc-ignorant.org
29315l1.apews.org
11608whois.rfc-ignorant.org (union of all results)
8744whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5192hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3808hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2864whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
982hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
913hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
317hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
243urired.spameatingmonkey.net
220dbl.spamhaus.org
198hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
81hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
68postmaster.rfc-ignorant.org
40dsn.rfc-ignorant.org (zone not intended for this use)
39bogusmx.rfc-ignorant.org
27multi.surbl.org
21rhsbl.ahbl.org
18fresh.spameatingmonkey.net
18dob.sibl.support-intelligence.net
7multi.uribl.com (result 127.0.0.2 = spam resource)
7hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
7multi.uribl.com (union of all results)
2bl.deadbeef.com
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
29142(total number of domains tested, including 122 at SDSC)
26706hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
10340(union of most domain zones)
5695hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4693hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4522abuse.rfc-ignorant.org
4069whois.rfc-ignorant.org (union of all results)
3852whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3035hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1544postmaster.rfc-ignorant.org
1030l1.apews.org
733hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
675urired.spameatingmonkey.net
597dbl.spamhaus.org
577bogusmx.rfc-ignorant.org
526multi.surbl.org
508hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
457multi.uribl.com (union of all results)
449multi.uribl.com (result 127.0.0.2 = spam resource)
400hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
353dsn.rfc-ignorant.org
217whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
78fresh.spameatingmonkey.net
64dob.sibl.support-intelligence.net
17rhsbl.ahbl.org
15hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
14hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
10ex.dnsbl.org
8multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 23 February 2011.