Blacklists Compared

31 May 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
62028(total number of IP addresses tested, including 138 at SDSC)
57693(union of most IP zones)
50812b.barracudacentral.org
49097zen.spamhaus.org (union of all results)
46735cbl.abuseat.org
46731zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
41646l2.apews.org
40395spam.dnsbl.sorbs.net
40215all.s5h.net
40049dnsbl-1.uceprotect.net
39941hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
38109ubl.unsubscore.com
36182bl.tiopan.com
35339hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
33634psbl.surriel.com
32960bl.mailspike.net (union of all results)
29292bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
27571zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
24524dnsbl.sorbs.net (union of all results)
22843dnsbl.inps.de
21238bl.spameatingmonkey.net
20553db.wpbl.info
17395truncate.gbudb.net
17032dnsbl-2.uceprotect.net
16636all.spamrats.com (union of all results)
15686dnsbl-3.uceprotect.net
14558bl.spamcop.net
13612dnsbl.sorbs.net (result 127.0.0.6 = spam source)
11947all.spamrats.com (result 127.0.0.36 = dialup)
9865dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7808dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
7246ix.dnsbl.manitu.net
6031list.dnswl.org (not a blacklist!)
5906ips.backscatterer.org
5620bl.score.senderscore.com
5582zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5319wl.mailspike.net (union of all results) (not a blacklist!)
4401mail-abuse.blacklist.jippg.org
4303all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3718hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3446wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3048hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2951bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
2583hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2536hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1632zen.spamhaus.org (union of SBL and SBLCSS results)
1590wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1448bl.spamcannibal.org
1286bl.mailspike.net (result 127.0.0.11 = very bad reputation)
1157zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
1114bl.mailspike.net (result 127.0.0.12 = bad reputation)
955free.v4bl.org
898spamsources.fabel.dk
719accredit.habeas.com (not a blacklist!)
655query.bondedsender.org (not a blacklist!)
629korea.services.net
626tr.countries.nerd.dk
475zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
434all.spamrats.com (result 127.0.0.38 = spam source)
311hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
239wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
164iadb.isipp.com (not a blacklist!)
124dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
124dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
124dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
81iadb2.isipp.com (not a blacklist!)
44wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
44bl.mav.com.br
36tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
36tor.dnsbl.sectoor.de (union of all results)
8multi.surbl.org
7multi.uribl.com (result 127.0.0.2 = spam resource)
7spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
7multi.uribl.com (union of all results)
7spamguard.leadmon.net (union of all results)
6dnsbl.sorbs.net (result 127.0.0.5 = open relay)
3dnsbl-0.uceprotect.net
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
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
62028(total number of IP addresses whose names were tested, including 138 at SDSC)
39649hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
32997hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16808l1.apews.org
4103hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2431(union of most domain zones)
2262hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1027hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
753hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
724dbl.spamhaus.org (result 127.0.1.2 = spam source)
724dbl.spamhaus.org (union of all results)
373hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
239hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
133hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
74dob.sibl.support-intelligence.net
53multi.surbl.org
52multi.uribl.com (union of all results)
51multi.uribl.com (result 127.0.0.2 = spam resource)
42fresh.spameatingmonkey.net
28urired.spameatingmonkey.net
17hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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
45946(total number of domains tested, including 112 at SDSC)
38668hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5586(union of most domain zones)
5079hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4150hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
3547dbl.spamhaus.org (result 127.0.1.2 = spam source)
3547dbl.spamhaus.org (union of all results)
3115hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2028multi.uribl.com (union of all results)
2017multi.uribl.com (result 127.0.0.2 = spam resource)
1931multi.surbl.org
1629hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1510hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1063dob.sibl.support-intelligence.net
506l1.apews.org
239hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
221urired.spameatingmonkey.net
205fresh.spameatingmonkey.net
29hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
25hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
19hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
9ex.dnsbl.org
8multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 3 June 2014.