Blacklists Compared

17 April 2010

[ 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, and wl.mailspike.net zones because they are not blacklists. Because it is too aggressive to be widely useful the l2.apews.org zone is also excluded from the union.

HitsDNS Zone
207005(total number of IP addresses tested, including 178 at SDSC)
203830(union of most IP zones)
192494b.barracudacentral.org
190487zen.spamhaus.org (union of all results)
160206cbl.abuseat.org
160194zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
143641hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
141278dnsbl-2.uceprotect.net
140863dnsbl-1.uceprotect.net
140662l2.apews.org
139816bl.mailspike.net (union of all results)
137579dnsbl-3.uceprotect.net
130650psbl.surriel.com
125321dnsbl.sorbs.net (union of all results)
113019zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
97914hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
90020ubl.unsubscore.com
88582dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
71233bl.spameatingmonkey.net
67117spam.dnsbl.sorbs.net
53728blackholes.five-ten-sg.com (union of all results)
53727bl.mailspike.net (result 127.0.0.12 = bad reputation)
52062bl.tiopan.com
50636dnsbl.sorbs.net (result 127.0.0.10 = dialup)
48220blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
45257bl.spamcop.net
44987bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
41228db.wpbl.info
38949no-more-funn.moensted.dk (union of all results)
36145zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
36086bl.mailspike.net (result 127.0.0.11 = very bad reputation)
30790ix.dnsbl.manitu.net
30632no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
29143bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
28731bl.score.senderscore.com
17822mail-abuse.blacklist.jippg.org
12456dnsbl.inps.de
10842hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8240dnsbl.sorbs.net (result 127.0.0.6 = spam source)
7454korea.services.net
7333no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
6405bl.spamcannibal.org
4457list.dnswl.org (not a blacklist!)
4251dnsbl.ahbl.org (union of all results)
4202blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4133dnsbl.ahbl.org (result 127.0.0.4 = spam source)
3719spamsources.fabel.dk
3084wl.mailspike.net (union of all results) (not a blacklist!)
2906hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2808tr.countries.nerd.dk
2731ips.backscatterer.org
2300wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2081hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2015dnsbl.njabl.org (union of all results)
1765dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1416hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1285blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
784wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
572zen.spamhaus.org (union of SBL and SBLCSS results)
558no-more-funn.moensted.dk (result 127.0.0.9 = misc)
534zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
511accredit.habeas.com (not a blacklist!)
484no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
440aspews.ext.sorbs.net
433query.bondedsender.org (not a blacklist!)
172l2.bbfh.ext.sorbs.net
171dnsbl.njabl.org (result 127.0.0.2 = open relay)
152tor.dnsbl.sectoor.de (union of all results)
151tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
151iadb2.isipp.com (not a blacklist!)
118dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
117hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
116iadb.isipp.com (not a blacklist!)
108l1.bbfh.ext.sorbs.net
106no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
79dnsbl.njabl.org (result 127.0.0.4 = spam source)
46dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
40dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
38zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
36bl.deadbeef.com
25dnsbl-0.uceprotect.net
24multi.surbl.org
20blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
12multi.uribl.com (union of all results)
11zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
11multi.uribl.com (result 127.0.0.2 = spam resource)
8spamguard.leadmon.net (union of all results)
5spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1blackholes.brainerd.net

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
207005(total number of IP addresses whose names were tested, including 178 at SDSC)
133391hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
121630hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
113830(union of most domain zones)
91086abuse.rfc-ignorant.org
77266l1.apews.org
39387whois.rfc-ignorant.org (union of all results)
36407dynamic.rhs.mailpolice.com
29260whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
12869hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
10128whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
6416webmail.rhs.mailpolice.com
3185hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1965hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
969adv.rhs.mailpolice.com
546hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
397urired.spameatingmonkey.net
327hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
233dbl.spamhaus.org
171hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
87multi.uribl.com (result 127.0.0.2 = spam resource)
87multi.uribl.com (union of all results)
68postmaster.rfc-ignorant.org
67hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
55multi.surbl.org
53bulk.rhs.mailpolice.com
46rhsbl.ahbl.org
40dsn.rfc-ignorant.org (zone not intended for this use)
36bogusmx.rfc-ignorant.org
34rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
34rhsbl.sorbs.net (union of all results)
20porn.rhs.mailpolice.com
12fresh.spameatingmonkey.net
9dob.sibl.support-intelligence.net
4hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2bl.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
66034(total number of domains tested, including 163 at SDSC)
62796hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
13979(union of most domain zones)
8477hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
5314whois.rfc-ignorant.org (union of all results)
4968whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4231abuse.rfc-ignorant.org
3714hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2754urired.spameatingmonkey.net
2158hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1879postmaster.rfc-ignorant.org
1224bogusmx.rfc-ignorant.org
845hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
672multi.surbl.org
650dbl.spamhaus.org
647webmail.rhs.mailpolice.com
496hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
449multi.uribl.com (union of all results)
435multi.uribl.com (result 127.0.0.2 = spam resource)
346whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
331dsn.rfc-ignorant.org
301dynamic.rhs.mailpolice.com
275adv.rhs.mailpolice.com
156porn.rhs.mailpolice.com
67bulk.rhs.mailpolice.com
38hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
37hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
25hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
22rhsbl.ahbl.org
20rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
20rhsbl.sorbs.net (union of all results)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
9hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
9ex.dnsbl.org
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
3dob.sibl.support-intelligence.net
2bl.deadbeef.com
1fresh.spameatingmonkey.net
1fraud.rhs.mailpolice.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 23 April 2010.