Blacklists Compared

11 August 2012

[ 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
58274(total number of IP addresses tested, including 189 at SDSC)
54545(union of most IP zones)
46289l2.apews.org
46110b.barracudacentral.org
45761zen.spamhaus.org (union of all results)
44401zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
44398cbl.abuseat.org
43539ip.v4bl.org
40174bl.tiopan.com
36289bl.mailspike.net (union of all results)
31972zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
29815bl.mailspike.net (result 127.0.0.12 = bad reputation)
28541hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
28471dnsbl-1.uceprotect.net
25601dnsbl-3.uceprotect.net
24085dnsbl-2.uceprotect.net
22509hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
22137all.spamrats.com (union of all results)
19228bl.spameatingmonkey.net
17512psbl.surriel.com
15595ubl.unsubscore.com
14871dnsbl.sorbs.net (union of all results)
13959spam.dnsbl.sorbs.net
12271all.spamrats.com (result 127.0.0.36 = dialup)
9623all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
9599wl.mailspike.net (union of all results) (not a blacklist!)
9564truncate.gbudb.net
8885dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7375bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
7283dnsbl.inps.de
6677dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6271list.dnswl.org (not a blacklist!)
6057wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
5547bl.spamcop.net
5198db.wpbl.info
4953zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4409bl.mailspike.net (result 127.0.0.11 = very bad reputation)
3332ix.dnsbl.manitu.net
2981hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2877wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2658bl.score.senderscore.com
2621hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2430hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2169ips.backscatterer.org
1423hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1348mail-abuse.blacklist.jippg.org
1268tr.countries.nerd.dk
1214bl.spamcannibal.org
958spamsources.fabel.dk
797bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
752accredit.habeas.com (not a blacklist!)
729zen.spamhaus.org (union of SBL and SBLCSS results)
625query.bondedsender.org (not a blacklist!)
617korea.services.net
477wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
386dnsbl.njabl.org (union of all results)
381all.spamrats.com (result 127.0.0.38 = spam source)
377zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
352zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
351dnsbl.njabl.org (result 127.0.0.9 = open proxy)
305l2.bbfh.ext.sorbs.net
298all.s5h.net
288aspews.ext.sorbs.net
264iadb.isipp.com (not a blacklist!)
254hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
199dnsbl.ahbl.org (union of all results)
194wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
144dnsbl.ahbl.org (result 127.0.0.4 = spam source)
101iadb2.isipp.com (not a blacklist!)
73dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
73dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
73dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
56dnsbl.sorbs.net (result 127.0.0.6 = spam source)
34tor.dnsbl.sectoor.de (union of all results)
33tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
32dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
23dnsbl.njabl.org (result 127.0.0.2 = open relay)
23dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
12dnsbl.njabl.org (result 127.0.0.4 = spam source)
8multi.surbl.org
8hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4dnsbl-0.uceprotect.net
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4swl.spamhaus.org (union of all results) (not a blacklist!)
3spamguard.leadmon.net (union of all results)
2swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
2swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
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
58274(total number of IP addresses whose names were tested, including 189 at SDSC)
29952hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
25122hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
20038(union of most domain zones)
16849abuse.rfc-ignorant.org
14061l1.apews.org
8553whois.rfc-ignorant.org (union of all results)
7261whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3574hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2833hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1292whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
359hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
358dbl.spamhaus.org (result 127.0.1.2 = spam source)
358dbl.spamhaus.org (union of all results)
348hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
254hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
168hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
120urired.spameatingmonkey.net
72hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
46bogusmx.rfc-ignorant.org
25multi.surbl.org
24rhsbl.ahbl.org
23multi.uribl.com (result 127.0.0.2 = spam resource)
23multi.uribl.com (union of all results)
20postmaster.rfc-ignorant.org
6dob.sibl.support-intelligence.net
5hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
3dsn.rfc-ignorant.org (zone not intended for this use)
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
43818(total number of domains tested, including 145 at SDSC)
40768hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
8311(union of most domain zones)
3938hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3513whois.rfc-ignorant.org (union of all results)
3378whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2123hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2105hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1864hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1587dbl.spamhaus.org (union of all results)
1586dbl.spamhaus.org (result 127.0.1.2 = spam source)
1544abuse.rfc-ignorant.org
1420hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
848multi.uribl.com (union of all results)
830multi.uribl.com (result 127.0.0.2 = spam resource)
827bogusmx.rfc-ignorant.org
819postmaster.rfc-ignorant.org
770multi.surbl.org
576l1.apews.org
258hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
238dsn.rfc-ignorant.org
225urired.spameatingmonkey.net
139dob.sibl.support-intelligence.net
135whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
34hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
21hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
18rhsbl.ahbl.org
17multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
13hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 14 August 2012.