Blacklists Compared

23 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
82641(total number of IP addresses tested, including 159 at SDSC)
77494(union of most IP zones)
65545ip.v4bl.org
63918b.barracudacentral.org
60083zen.spamhaus.org (union of all results)
55883bl.tiopan.com
49268bl.mailspike.net (union of all results)
46828zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
46153cbl.abuseat.org
45781dnsbl-1.uceprotect.net
45210hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
42469zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
40266spam.dnsbl.sorbs.net
39649bl.mailspike.net (result 127.0.0.12 = bad reputation)
32109psbl.surriel.com
31892hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
30795dnsbl.sorbs.net (union of all results)
26421dnsbl-3.uceprotect.net
26388dnsbl.inps.de
25876dnsbl-2.uceprotect.net
25822all.spamrats.com (union of all results)
25794db.wpbl.info
25515bl.spameatingmonkey.net
23426ubl.unsubscore.com
18094free.v4bl.org
17044all.spamrats.com (result 127.0.0.36 = dialup)
15406dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
14831dnsbl.sorbs.net (result 127.0.0.10 = dialup)
14399truncate.gbudb.net
10170wl.mailspike.net (union of all results) (not a blacklist!)
9211bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
9044ips.backscatterer.org
8399all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
8328dnsbl.sorbs.net (result 127.0.0.6 = spam source)
7709bl.spamcop.net
7660bl.mailspike.net (result 127.0.0.11 = very bad reputation)
7465list.dnswl.org (not a blacklist!)
7209hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
7096ix.dnsbl.manitu.net
5940zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5531wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
5092bl.score.senderscore.com
4380bl.mav.com.br
4332wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
3783hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3390hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
3372all.s5h.net
2884mail-abuse.blacklist.jippg.org
1998bl.spamcannibal.org
1865hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1426spamsources.fabel.dk
749accredit.habeas.com (not a blacklist!)
728tr.countries.nerd.dk
648query.bondedsender.org (not a blacklist!)
612zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
612zen.spamhaus.org (union of SBL and SBLCSS results)
611korea.services.net
469all.spamrats.com (result 127.0.0.38 = spam source)
459bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
280l2.bbfh.ext.sorbs.net
233iadb.isipp.com (not a blacklist!)
216hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
203wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
170dnsbl.ahbl.org (union of all results)
134iadb2.isipp.com (not a blacklist!)
126dnsbl.ahbl.org (result 127.0.0.4 = spam source)
104wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
61dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
61dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
61dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
49tor.dnsbl.sectoor.de (union of all results)
45tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
28dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
15dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
10multi.surbl.org
10dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
8hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5dnsbl-0.uceprotect.net
4tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
4spamguard.leadmon.net (union of all results)
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
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
82641(total number of IP addresses whose names were tested, including 159 at SDSC)
50787hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
38564hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6289hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3408hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2942(union of most domain zones)
1079hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
914hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
628hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
611dbl.spamhaus.org (union of all results)
609dbl.spamhaus.org (result 127.0.1.2 = spam source)
183hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
164hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
79dob.sibl.support-intelligence.net
77fresh.spameatingmonkey.net
61multi.surbl.org
53multi.uribl.com (result 127.0.0.2 = spam resource)
53multi.uribl.com (union of all results)
33urired.spameatingmonkey.net
19rhsbl.ahbl.org
6hostkarma.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
54253(total number of domains tested, including 125 at SDSC)
47583hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5039hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3374(union of most domain zones)
2667hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2525hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2331hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1879dbl.spamhaus.org (union of all results)
1872dbl.spamhaus.org (result 127.0.1.2 = spam source)
1451multi.surbl.org
1260hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1254multi.uribl.com (union of all results)
1241multi.uribl.com (result 127.0.0.2 = spam resource)
559dob.sibl.support-intelligence.net
386fresh.spameatingmonkey.net
317hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
52urired.spameatingmonkey.net
31hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
17rhsbl.ahbl.org
13hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8ex.dnsbl.org
7dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
6hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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 25 March 2013.