Blacklists Compared

20 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, l2.apews.org, and ip.v4bl.org zones are also excluded from the union.

HitsDNS Zone
90830(total number of IP addresses tested, including 164 at SDSC)
83486(union of most IP zones)
62874ip.v4bl.org
61674b.barracudacentral.org
59125zen.spamhaus.org (union of all results)
54738bl.mailspike.net (union of all results)
54082cbl.abuseat.org
54068zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
53817bl.tiopan.com
47659spam.dnsbl.sorbs.net
45547dnsbl-1.uceprotect.net
42451hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
41549bl.mailspike.net (result 127.0.0.12 = bad reputation)
38611hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
38571zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
32200dnsbl.sorbs.net (union of all results)
30553db.wpbl.info
27179dnsbl-2.uceprotect.net
26496psbl.surriel.com
26271bl.spameatingmonkey.net
25962dnsbl-3.uceprotect.net
25319dnsbl.inps.de
24411all.spamrats.com (union of all results)
20640ubl.unsubscore.com
17892truncate.gbudb.net
17615ips.backscatterer.org
16034all.spamrats.com (result 127.0.0.36 = dialup)
16028dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
13673dnsbl.sorbs.net (result 127.0.0.10 = dialup)
13333dnsbl.sorbs.net (result 127.0.0.6 = spam source)
11305bl.spamcop.net
9766wl.mailspike.net (union of all results) (not a blacklist!)
9267bl.mailspike.net (result 127.0.0.11 = very bad reputation)
8567list.dnswl.org (not a blacklist!)
8410free.v4bl.org
8185bl.score.senderscore.com
7884all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
6722zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6637ix.dnsbl.manitu.net
6424bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
6232wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
4909bl.mav.com.br
4031hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
4018hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3464all.s5h.net
3457hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
3047bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
2881wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2050hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2030bl.spamcannibal.org
1645tr.countries.nerd.dk
1642spamsources.fabel.dk
916zen.spamhaus.org (union of SBL and SBLCSS results)
723accredit.habeas.com (not a blacklist!)
708mail-abuse.blacklist.jippg.org
706korea.services.net
613zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
592all.spamrats.com (result 127.0.0.38 = spam source)
588query.bondedsender.org (not a blacklist!)
561wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
537hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
303zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
289l2.bbfh.ext.sorbs.net
187iadb.isipp.com (not a blacklist!)
178dnsbl.ahbl.org (union of all results)
132dnsbl.ahbl.org (result 127.0.0.4 = spam source)
105wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
80iadb2.isipp.com (not a blacklist!)
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)
65tor.dnsbl.sectoor.de (union of all results)
62tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
32dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
13dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
8hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6dnsbl-0.uceprotect.net
6dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
5multi.surbl.org
5spamguard.leadmon.net (union of all results)
4spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2multi.uribl.com (union of all results)
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
90830(total number of IP addresses whose names were tested, including 164 at SDSC)
59416hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
39603hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7787hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3937hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3024(union of most domain zones)
1183hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
882hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
648dbl.spamhaus.org (union of all results)
646dbl.spamhaus.org (result 127.0.1.2 = spam source)
520hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
216hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
107hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
78urired.spameatingmonkey.net
77multi.uribl.com (union of all results)
75multi.uribl.com (result 127.0.0.2 = spam resource)
46fresh.spameatingmonkey.net
45multi.surbl.org
41dob.sibl.support-intelligence.net
22rhsbl.ahbl.org
17hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
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
67117(total number of domains tested, including 131 at SDSC)
60578hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
28079(union of most domain zones)
27036hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
4303hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2287hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2117hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1970dbl.spamhaus.org (union of all results)
1968dbl.spamhaus.org (result 127.0.1.2 = spam source)
1418hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1318multi.uribl.com (union of all results)
1301multi.uribl.com (result 127.0.0.2 = spam resource)
1263multi.surbl.org
310hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
248dob.sibl.support-intelligence.net
170fresh.spameatingmonkey.net
43urired.spameatingmonkey.net
24hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
19hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
18rhsbl.ahbl.org
13multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
11hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
6ex.dnsbl.org
4multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 22 April 2013.