Blacklists Compared

7 July 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
61611(total number of IP addresses tested, including 211 at SDSC)
58092(union of most IP zones)
50311zen.spamhaus.org (union of all results)
50097b.barracudacentral.org
48716zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
48716cbl.abuseat.org
46733ip.v4bl.org
40920bl.tiopan.com
39168bl.mailspike.net (union of all results)
34297hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
33895zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
31680dnsbl-1.uceprotect.net
30212dnsbl-3.uceprotect.net
29012dnsbl-2.uceprotect.net
28464bl.mailspike.net (result 127.0.0.12 = bad reputation)
24852all.spamrats.com (union of all results)
24003hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
19228bl.spameatingmonkey.net
18490psbl.surriel.com
17632dnsbl.sorbs.net (union of all results)
16440spam.dnsbl.sorbs.net
16418ubl.unsubscore.com
14430all.spamrats.com (result 127.0.0.36 = dialup)
10496dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10088all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
9746bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
8580truncate.gbudb.net
8295wl.mailspike.net (union of all results) (not a blacklist!)
8125dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
7891dnsbl.inps.de
6651bl.mailspike.net (result 127.0.0.11 = very bad reputation)
6382zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5932list.dnswl.org (not a blacklist!)
5293db.wpbl.info
5228wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
4199hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
4110bl.spamcop.net
3105ix.dnsbl.manitu.net
2808hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2564bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
2444wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2304hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2301ips.backscatterer.org
1785tr.countries.nerd.dk
1515bl.score.senderscore.com
1235hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1215bl.spamcannibal.org
974spamsources.fabel.dk
945zen.spamhaus.org (union of SBL and SBLCSS results)
939korea.services.net
719accredit.habeas.com (not a blacklist!)
629mail-abuse.blacklist.jippg.org
564query.bondedsender.org (not a blacklist!)
539zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
472all.spamrats.com (result 127.0.0.38 = spam source)
458wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
406zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
377all.s5h.net
371dnsbl.njabl.org (union of all results)
317dnsbl.njabl.org (result 127.0.0.9 = open proxy)
299l2.bbfh.ext.sorbs.net
235dnsbl.ahbl.org (union of all results)
214hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
203aspews.ext.sorbs.net
196iadb.isipp.com (not a blacklist!)
175dnsbl.ahbl.org (result 127.0.0.4 = spam source)
166wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
79iadb2.isipp.com (not a blacklist!)
71dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
71dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
71dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
69dnsbl.sorbs.net (result 127.0.0.6 = spam source)
33dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
31dnsbl.njabl.org (result 127.0.0.2 = open relay)
27dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
26tor.dnsbl.sectoor.de (union of all results)
25tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
23dnsbl.njabl.org (result 127.0.0.4 = spam source)
10bl.deadbeef.com
7multi.surbl.org
7hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4multi.uribl.com (result 127.0.0.2 = spam resource)
4multi.uribl.com (union of all results)
3dnsbl-0.uceprotect.net
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2swl.spamhaus.org (union of all results) (not a blacklist!)
2spamguard.leadmon.net (union of all results)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
1swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
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
61611(total number of IP addresses whose names were tested, including 211 at SDSC)
32688hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
25618hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
22115(union of most domain zones)
18311abuse.rfc-ignorant.org
8774whois.rfc-ignorant.org (union of all results)
7194whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4482hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2665hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1580whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
437hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
401hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
379hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
324dbl.spamhaus.org (result 127.0.1.2 = spam source)
324dbl.spamhaus.org (union of all results)
197urired.spameatingmonkey.net
148hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
64rhsbl.ahbl.org
46hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
43postmaster.rfc-ignorant.org
40fresh.spameatingmonkey.net
35bogusmx.rfc-ignorant.org
30multi.surbl.org
12multi.uribl.com (result 127.0.0.2 = spam resource)
12multi.uribl.com (union of all results)
10dob.sibl.support-intelligence.net
5dsn.rfc-ignorant.org (zone not intended for this use)
4hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1bl.deadbeef.com
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
36459(total number of domains tested, including 197 at SDSC)
28956hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7402(union of most domain zones)
3703hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3478hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
3393whois.rfc-ignorant.org (union of all results)
3251whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2152hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2062hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1401dbl.spamhaus.org (result 127.0.1.2 = spam source)
1401dbl.spamhaus.org (union of all results)
1395abuse.rfc-ignorant.org
1224hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
747bogusmx.rfc-ignorant.org
739multi.surbl.org
729postmaster.rfc-ignorant.org
596multi.uribl.com (union of all results)
581multi.uribl.com (result 127.0.0.2 = spam resource)
479urired.spameatingmonkey.net
315hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
214dsn.rfc-ignorant.org
166fresh.spameatingmonkey.net
142whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
88dob.sibl.support-intelligence.net
82hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
17hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
16rhsbl.ahbl.org
14hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
13multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
6ex.dnsbl.org
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 10 July 2012.