Blacklists Compared

19 October 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
36407(total number of IP addresses tested, including 148 at SDSC)
31698(union of most IP zones)
24246l2.apews.org
24083b.barracudacentral.org
22865zen.spamhaus.org (union of all results)
19524cbl.abuseat.org
19522zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
19092hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
19015bl.tiopan.com
18540hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14283spam.dnsbl.sorbs.net
13772zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
12352dnsbl-1.uceprotect.net
10901all.spamrats.com (union of all results)
10657bl.mailspike.net (union of all results)
10322ubl.unsubscore.com
9737dnsbl.sorbs.net (union of all results)
8806db.wpbl.info
8060dnsbl.inps.de
7505all.spamrats.com (result 127.0.0.36 = dialup)
7503bl.mailspike.net (result 127.0.0.12 = bad reputation)
6997psbl.surriel.com
6795dnsbl-2.uceprotect.net
6580truncate.gbudb.net
6490bl.spameatingmonkey.net
6231list.dnswl.org (not a blacklist!)
5707ips.backscatterer.org
5460wl.mailspike.net (union of all results) (not a blacklist!)
4809dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
4680dnsbl-3.uceprotect.net
4097dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3459hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3293wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3258bl.spamcop.net
3141all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
2934hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2625hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2384bl.mailspike.net (result 127.0.0.11 = very bad reputation)
2281dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2063hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1728zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1677bl.score.senderscore.com
1664zen.spamhaus.org (union of SBL and SBLCSS results)
1481wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1321ix.dnsbl.manitu.net
1286bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1250bl.spamcannibal.org
1171all.s5h.net
916spamsources.fabel.dk
870zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
799accredit.habeas.com (not a blacklist!)
794zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
662query.bondedsender.org (not a blacklist!)
637wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
529mail-abuse.blacklist.jippg.org
481korea.services.net
300free.v4bl.org
288all.spamrats.com (result 127.0.0.38 = spam source)
176bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
163iadb.isipp.com (not a blacklist!)
154tr.countries.nerd.dk
146bl.mav.com.br
100iadb2.isipp.com (not a blacklist!)
87hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
76dnsbl.ahbl.org (union of all results)
72tor.dnsbl.sectoor.de (union of all results)
70tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
67dnsbl.ahbl.org (result 127.0.0.4 = spam source)
63dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
63dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
63dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
49wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
9dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
5wadb.isipp.com
5dnsbl-0.uceprotect.net
4multi.surbl.org
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1spamguard.leadmon.net (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
36407(total number of IP addresses whose names were tested, including 148 at SDSC)
21967hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
17675hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7123l1.apews.org
2734(union of most domain zones)
2505hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2418hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1112dbl.spamhaus.org (result 127.0.1.2 = spam source)
1112dbl.spamhaus.org (union of all results)
1035hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
992hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
689hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
193hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
166multi.surbl.org
109hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
61rhsbl.ahbl.org
35urired.spameatingmonkey.net
32fresh.spameatingmonkey.net
26dob.sibl.support-intelligence.net
23hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
4hostkarma.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
19236(total number of domains tested, including 113 at SDSC)
15292hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3709hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3394(union of most domain zones)
2573dbl.spamhaus.org (union of all results)
2571dbl.spamhaus.org (result 127.0.1.2 = spam source)
2328hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2158hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1456hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1265hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1206multi.surbl.org
999fresh.spameatingmonkey.net
955dob.sibl.support-intelligence.net
415l1.apews.org
203hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
94urired.spameatingmonkey.net
32hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
32rhsbl.ahbl.org
26hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
10hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
4ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 20 October 2013.