Blacklists Compared

5 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
77076(total number of IP addresses tested, including 167 at SDSC)
73677(union of most IP zones)
65690b.barracudacentral.org
63473zen.spamhaus.org (union of all results)
62138zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
62137cbl.abuseat.org
61984l2.apews.org
54284hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
52244bl.mailspike.net (union of all results)
50089dnsbl-1.uceprotect.net
43701psbl.surriel.com
40881bl.tiopan.com
40793bl.spameatingmonkey.net
38628dnsbl-3.uceprotect.net
38510zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
38085hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
37822dnsbl-2.uceprotect.net
33270ubl.unsubscore.com
32202bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
28445spam.dnsbl.sorbs.net
22155blackholes.five-ten-sg.com (union of all results)
21225bl.mailspike.net (result 127.0.0.11 = very bad reputation)
20772db.wpbl.info
18877dnsbl.sorbs.net (union of all results)
15481bl.spamcop.net
14365bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
12876dnsbl.sorbs.net (result 127.0.0.10 = dialup)
11308blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
10240ix.dnsbl.manitu.net
9491blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
9321zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
9072dnsbl.inps.de
9029bl.mailspike.net (result 127.0.0.12 = bad reputation)
7976no-more-funn.moensted.dk (union of all results)
7884mail-abuse.blacklist.jippg.org
6120no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
5307list.dnswl.org (not a blacklist!)
5300hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3956ips.backscatterer.org
3314dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3208dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3145wl.mailspike.net (union of all results) (not a blacklist!)
2350hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2225wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2191hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2089hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1716bl.spamcannibal.org
1673no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1325blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1127bl.score.senderscore.com
1125spamsources.fabel.dk
1101l2.bbfh.ext.sorbs.net
1095korea.services.net
911wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
685dnsbl.njabl.org (union of all results)
640tr.countries.nerd.dk
577dnsbl.njabl.org (result 127.0.0.9 = open proxy)
562accredit.habeas.com (not a blacklist!)
492query.bondedsender.org (not a blacklist!)
396aspews.ext.sorbs.net
335zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
335zen.spamhaus.org (union of SBL and SBLCSS results)
306dnsbl.ahbl.org (union of all results)
196dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
177l1.bbfh.ext.sorbs.net
155iadb2.isipp.com (not a blacklist!)
128iadb.isipp.com (not a blacklist!)
124hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
115dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
115dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
115dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
105no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
80dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
77no-more-funn.moensted.dk (result 127.0.0.9 = misc)
71dnsbl.njabl.org (result 127.0.0.2 = open relay)
58no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
55tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
55tor.dnsbl.sectoor.de (union of all results)
37dnsbl.njabl.org (result 127.0.0.4 = spam source)
30blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
30dnsbl.ahbl.org (result 127.0.0.4 = spam source)
26swl.spamhaus.org (union of all results) (not a blacklist!)
22bl.deadbeef.com
17swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
16multi.surbl.org
9swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
9wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
8zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
8spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
8spamguard.leadmon.net (union of all results)
5dnsbl-0.uceprotect.net
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
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
77076(total number of IP addresses whose names were tested, including 167 at SDSC)
50597hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
43339hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
36431(union of most domain zones)
30290abuse.rfc-ignorant.org
29832l1.apews.org
11446whois.rfc-ignorant.org (union of all results)
8356whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4987hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3797hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3090whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1296hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1018hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
733dbl.spamhaus.org
324hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
236urired.spameatingmonkey.net
186hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
86hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
53postmaster.rfc-ignorant.org
34dsn.rfc-ignorant.org (zone not intended for this use)
34bogusmx.rfc-ignorant.org
22multi.surbl.org
20dob.sibl.support-intelligence.net
20rhsbl.ahbl.org
19fresh.spameatingmonkey.net
11hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
10multi.uribl.com (result 127.0.0.2 = spam resource)
10multi.uribl.com (union of all results)
4bl.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
24913(total number of domains tested, including 130 at SDSC)
22672hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
8156(union of most domain zones)
5416hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4150whois.rfc-ignorant.org (union of all results)
3971whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2885hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2536hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2425abuse.rfc-ignorant.org
1389postmaster.rfc-ignorant.org
1012l1.apews.org
749hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
653dbl.spamhaus.org
632urired.spameatingmonkey.net
570multi.surbl.org
558hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
442multi.uribl.com (union of all results)
435multi.uribl.com (result 127.0.0.2 = spam resource)
423bogusmx.rfc-ignorant.org
398hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
272dsn.rfc-ignorant.org
179whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
98fresh.spameatingmonkey.net
89dob.sibl.support-intelligence.net
18hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
18rhsbl.ahbl.org
10hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
7multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
6ex.dnsbl.org
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 8 February 2011.