Blacklists Compared

13 July 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
82244(total number of IP addresses tested, including 164 at SDSC)
77132(union of most IP zones)
69123b.barracudacentral.org
69011zen.spamhaus.org (union of all results)
67819l2.apews.org
62824cbl.abuseat.org
62823zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
59978bl.tiopan.com
51935spam.dnsbl.sorbs.net
47626dnsbl-1.uceprotect.net
47155bl.mailspike.net (union of all results)
46363hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
45155zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
41598hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
41093psbl.surriel.com
39962dnsbl.sorbs.net (union of all results)
37854db.wpbl.info
31936bl.spameatingmonkey.net
30879bl.mailspike.net (result 127.0.0.12 = bad reputation)
27657dnsbl-2.uceprotect.net
27141all.spamrats.com (union of all results)
26278dnsbl-3.uceprotect.net
25129dnsbl.inps.de
24335truncate.gbudb.net
22264dnsbl.sorbs.net (result 127.0.0.6 = spam source)
19558dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
18362ubl.unsubscore.com
18289all.spamrats.com (result 127.0.0.36 = dialup)
15187dnsbl.sorbs.net (result 127.0.0.10 = dialup)
14689bl.mav.com.br
14393bl.score.senderscore.com
13471bl.spamcop.net
13039bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
10376ips.backscatterer.org
8623all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
7524zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6315ix.dnsbl.manitu.net
6274list.dnswl.org (not a blacklist!)
5857wl.mailspike.net (union of all results) (not a blacklist!)
4680bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
3745wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3633all.s5h.net
3447hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3411hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2539hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2202hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1653bl.mailspike.net (result 127.0.0.11 = very bad reputation)
1627bl.spamcannibal.org
1603spamsources.fabel.dk
1504tr.countries.nerd.dk
1499wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1323free.v4bl.org
1303zen.spamhaus.org (union of SBL and SBLCSS results)
774hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
766zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
748accredit.habeas.com (not a blacklist!)
631query.bondedsender.org (not a blacklist!)
537zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
534wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
509korea.services.net
369mail-abuse.blacklist.jippg.org
318all.spamrats.com (result 127.0.0.38 = spam source)
166iadb.isipp.com (not a blacklist!)
100dnsbl.ahbl.org (union of all results)
92iadb2.isipp.com (not a blacklist!)
79wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
77dnsbl.ahbl.org (result 127.0.0.4 = spam source)
65dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
65dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
65dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
38tor.dnsbl.sectoor.de (union of all results)
35tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
22dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
9dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4dnsbl-0.uceprotect.net
4multi.surbl.org
3wadb.isipp.com
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
3spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
3spamguard.leadmon.net (union of all results)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2multi.uribl.com (union of all results)
1l2.bbfh.ext.sorbs.net
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
82244(total number of IP addresses whose names were tested, including 164 at SDSC)
48828hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
37499hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
27244l1.apews.org
7215hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2783(union of most domain zones)
2629hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1079hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
915hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
781dbl.spamhaus.org (result 127.0.1.2 = spam source)
781dbl.spamhaus.org (union of all results)
386hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
253hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
127multi.surbl.org
106fresh.spameatingmonkey.net
99dob.sibl.support-intelligence.net
75multi.uribl.com (result 127.0.0.2 = spam resource)
75hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
75multi.uribl.com (union of all results)
29urired.spameatingmonkey.net
29rhsbl.ahbl.org
28hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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
81454(total number of domains tested, including 126 at SDSC)
72835hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3820(union of most domain zones)
3211hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
1647fresh.spameatingmonkey.net
1628hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1577dbl.spamhaus.org (union of all results)
1573dbl.spamhaus.org (result 127.0.1.2 = spam source)
1461hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1419hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1080multi.surbl.org
1052multi.uribl.com (union of all results)
1039multi.uribl.com (result 127.0.0.2 = spam resource)
840hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
402dob.sibl.support-intelligence.net
390l1.apews.org
213hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
158urired.spameatingmonkey.net
29rhsbl.ahbl.org
28hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
4hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
4ex.dnsbl.org
4dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 16 July 2013.