Blacklists Compared

22 February 2014

[ 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
69670(total number of IP addresses tested, including 164 at SDSC)
64799(union of most IP zones)
57495b.barracudacentral.org
55868zen.spamhaus.org (union of all results)
54931l2.apews.org
54297cbl.abuseat.org
54284zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
48913spam.dnsbl.sorbs.net
47065bl.tiopan.com
46043dnsbl-1.uceprotect.net
43740ubl.unsubscore.com
42413hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
39548hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
39462psbl.surriel.com
33224zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
32780bl.mailspike.net (union of all results)
30550dnsbl.sorbs.net (union of all results)
28878bl.spameatingmonkey.net
28158bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
27967dnsbl.inps.de
25936db.wpbl.info
22425dnsbl-2.uceprotect.net
20011dnsbl-3.uceprotect.net
18921bl.spamcop.net
18527all.spamrats.com (union of all results)
17769dnsbl.sorbs.net (result 127.0.0.6 = spam source)
13331all.spamrats.com (result 127.0.0.36 = dialup)
12436dnsbl.sorbs.net (result 127.0.0.10 = dialup)
12006truncate.gbudb.net
9290dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6808zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6056list.dnswl.org (not a blacklist!)
5788bl.score.senderscore.com
5754ips.backscatterer.org
5015all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
4583wl.mailspike.net (union of all results) (not a blacklist!)
3912hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3265hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2826hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2811wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2749bl.mailspike.net (result 127.0.0.11 = very bad reputation)
2131bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1862ix.dnsbl.manitu.net
1789hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1697spamsources.fabel.dk
1685all.s5h.net
1609bl.spamcannibal.org
1246korea.services.net
1223wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1178zen.spamhaus.org (union of SBL and SBLCSS results)
1129tr.countries.nerd.dk
823bl.mailspike.net (result 127.0.0.12 = bad reputation)
727accredit.habeas.com (not a blacklist!)
725zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
664hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
652query.bondedsender.org (not a blacklist!)
488wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
453zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
356mail-abuse.blacklist.jippg.org
349free.v4bl.org
252all.spamrats.com (result 127.0.0.38 = spam source)
164iadb.isipp.com (not a blacklist!)
115bl.mav.com.br
88iadb2.isipp.com (not a blacklist!)
86dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
86dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
86dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
74dnsbl.ahbl.org (union of all results)
62wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
56dnsbl.ahbl.org (result 127.0.0.4 = spam source)
34tor.dnsbl.sectoor.de (union of all results)
33tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
17dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
13multi.surbl.org
11multi.uribl.com (result 127.0.0.2 = spam resource)
11multi.uribl.com (union of all results)
9dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
8spamguard.leadmon.net (union of all results)
7spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2wadb.isipp.com
2dnsbl-0.uceprotect.net
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
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
69670(total number of IP addresses whose names were tested, including 164 at SDSC)
43717hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
36864hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
23190l1.apews.org
5115hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2392hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1604(union of most domain zones)
719hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
546dbl.spamhaus.org (result 127.0.1.2 = spam source)
546dbl.spamhaus.org (union of all results)
391hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
277hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
261hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
94fresh.spameatingmonkey.net
62hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
58dob.sibl.support-intelligence.net
53hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
44multi.uribl.com (union of all results)
43multi.uribl.com (result 127.0.0.2 = spam resource)
43multi.surbl.org
28rhsbl.ahbl.org
24urired.spameatingmonkey.net
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
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
53675(total number of domains tested, including 135 at SDSC)
45331hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5430(union of most domain zones)
5392hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3533hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
3117dbl.spamhaus.org (result 127.0.1.2 = spam source)
3117dbl.spamhaus.org (union of all results)
2647hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1664hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1617hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1266multi.uribl.com (union of all results)
1246multi.uribl.com (result 127.0.0.2 = spam resource)
1195l1.apews.org
1151multi.surbl.org
381dob.sibl.support-intelligence.net
322fresh.spameatingmonkey.net
196hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
145urired.spameatingmonkey.net
77hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
33rhsbl.ahbl.org
16hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
14multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
12hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
6multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
4ex.dnsbl.org
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 25 February 2014.