Blacklists Compared

27 April 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 and l2.apews.org zones are also excluded from the union.

HitsDNS Zone
116339(total number of IP addresses tested, including 145 at SDSC)
110518(union of most IP zones)
93481b.barracudacentral.org
90487zen.spamhaus.org (union of all results)
81177bl.tiopan.com
80722zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
80527cbl.abuseat.org
73622spam.dnsbl.sorbs.net
70307dnsbl-1.uceprotect.net
68490hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
68055zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
66021bl.mailspike.net (union of all results)
58422db.wpbl.info
54224psbl.surriel.com
52682dnsbl-2.uceprotect.net
51504dnsbl.sorbs.net (union of all results)
51397dnsbl-3.uceprotect.net
48734dnsbl.inps.de
43079bl.mailspike.net (result 127.0.0.12 = bad reputation)
41871bl.spameatingmonkey.net
39026ubl.unsubscore.com
36872all.spamrats.com (union of all results)
35570hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
33649dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
28573truncate.gbudb.net
21308all.spamrats.com (result 127.0.0.36 = dialup)
19887dnsbl.sorbs.net (result 127.0.0.10 = dialup)
15814bl.mailspike.net (result 127.0.0.11 = very bad reputation)
15402bl.spamcop.net
15148all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
14197ips.backscatterer.org
14067dnsbl.sorbs.net (result 127.0.0.6 = spam source)
10917wl.mailspike.net (union of all results) (not a blacklist!)
10550bl.score.senderscore.com
8618ix.dnsbl.manitu.net
8608bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
7966list.dnswl.org (not a blacklist!)
7724zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6795all.s5h.net
6326hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5954free.v4bl.org
5509bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
5401wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
4886wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
3869hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3190hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2722bl.spamcannibal.org
2124hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1893bl.mav.com.br
1689tr.countries.nerd.dk
1455spamsources.fabel.dk
891mail-abuse.blacklist.jippg.org
748accredit.habeas.com (not a blacklist!)
690zen.spamhaus.org (union of SBL and SBLCSS results)
671korea.services.net
599query.bondedsender.org (not a blacklist!)
561all.spamrats.com (result 127.0.0.38 = spam source)
488wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
455zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
443hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
293l2.bbfh.ext.sorbs.net
235zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
230iadb.isipp.com (not a blacklist!)
209dnsbl.ahbl.org (union of all results)
159dnsbl.ahbl.org (result 127.0.0.4 = spam source)
150wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
111iadb2.isipp.com (not a blacklist!)
72dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
72dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
72dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
65tor.dnsbl.sectoor.de (union of all results)
64tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
34dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
15dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
14dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
6multi.uribl.com (result 127.0.0.2 = spam resource)
6multi.uribl.com (union of all results)
5multi.surbl.org
5hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5spamguard.leadmon.net (union of all results)
4dnsbl-0.uceprotect.net
4spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
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
116339(total number of IP addresses whose names were tested, including 145 at SDSC)
65180hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
46880hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7769hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3484hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3011(union of most domain zones)
1136hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
928hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
719dbl.spamhaus.org (union of all results)
717dbl.spamhaus.org (result 127.0.1.2 = spam source)
505hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
312hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
138hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
76multi.uribl.com (union of all results)
73multi.uribl.com (result 127.0.0.2 = spam resource)
60fresh.spameatingmonkey.net
53multi.surbl.org
47dob.sibl.support-intelligence.net
42urired.spameatingmonkey.net
24rhsbl.ahbl.org
22hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
1hostkarma.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
80149(total number of domains tested, including 104 at SDSC)
73108hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
14913(union of most domain zones)
13901hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
5589hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3227hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2849hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1810dbl.spamhaus.org (union of all results)
1805dbl.spamhaus.org (result 127.0.1.2 = spam source)
1707hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1279multi.uribl.com (union of all results)
1276multi.surbl.org
1259multi.uribl.com (result 127.0.0.2 = spam resource)
367hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
274dob.sibl.support-intelligence.net
203fresh.spameatingmonkey.net
38urired.spameatingmonkey.net
29hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
21hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
19rhsbl.ahbl.org
15multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
11ex.dnsbl.org
5multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
5dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
4hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 30 April 2013.