Blacklists Compared

24 October 2009

[ 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, and iadb2.isipp.com 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
167330(total number of IP addresses tested, including 190 at SDSC)
163347(union of most IP zones)
145894zen.spamhaus.org (union of all results)
139462l2.apews.org
132365b.barracudacentral.org
114409cbl.abuseat.org
114338zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
107216dnsbl-1.uceprotect.net
105518hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
103636dnsbl-3.uceprotect.net
102901dnsbl-2.uceprotect.net
97213dnsbl.sorbs.net (union of all results)
94297zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
88606psbl.surriel.com
80786bl.spameatingmonkey.net
80337ubl.unsubscore.com
70738dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
56824hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
40132blackholes.five-ten-sg.com (union of all results)
39622no-more-funn.moensted.dk (union of all results)
38469dnsbl.sorbs.net (result 127.0.0.10 = dialup)
36714blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
34981db.wpbl.info
34498bl.spamcop.net
26766no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
22302zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
18846ix.dnsbl.manitu.net
17975spam.dnsbl.sorbs.net
13976mail-abuse.blacklist.jippg.org
11359dnsbl.inps.de
10433bl.spamcannibal.org
10430no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
9333ips.backscatterer.org
9069korea.services.net
8172hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
4564spamsources.fabel.dk
4096list.dnswl.org (not a blacklist!)
3066hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2950hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2529blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2528dnsbl.njabl.org (union of all results)
1995hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1947dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1909tr.countries.nerd.dk
1395no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1015zen.spamhaus.org (union of SBL and SBLCSS results)
990no-more-funn.moensted.dk (result 127.0.0.9 = misc)
865blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
670aspews.ext.sorbs.net
521accredit.habeas.com (not a blacklist!)
517zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
500dnsbl.sorbs.net (result 127.0.0.6 = spam source)
498zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
451l2.bbfh.ext.sorbs.net
425query.bondedsender.org (not a blacklist!)
398dnsbl.njabl.org (result 127.0.0.4 = spam source)
210l1.bbfh.ext.sorbs.net
183dnsbl.njabl.org (result 127.0.0.2 = open relay)
180dnsbl.ahbl.org (union of all results)
156iadb2.isipp.com (not a blacklist!)
138dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
133no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
119iadb.isipp.com (not a blacklist!)
105tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
105tor.dnsbl.sectoor.de (union of all results)
89hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
62dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
51bl.deadbeef.com
42dnsbl.ahbl.org (result 127.0.0.4 = spam source)
40dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
38dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
22blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
16zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
16multi.uribl.com (result 127.0.0.2 = spam resource)
16multi.uribl.com (union of all results)
12dnsbl-0.uceprotect.net
7multi.surbl.org
7hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6blackholes.brainerd.net
6spamguard.leadmon.net (union of all results)
5spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)

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
167330(total number of IP addresses whose names were tested, including 190 at SDSC)
103640hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
90611hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
83902(union of most domain zones)
73180l1.apews.org
67236abuse.rfc-ignorant.org
33554dynamic.rhs.mailpolice.com
26751whois.rfc-ignorant.org (union of all results)
18985whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
10556hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
7766whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4098webmail.rhs.mailpolice.com
3224hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
969urired.spameatingmonkey.net
853adv.rhs.mailpolice.com
823hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
814hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
473hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
232bl.deadbeef.com
215hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
125rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
125rhsbl.sorbs.net (union of all results)
118hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
78postmaster.rfc-ignorant.org
61multi.surbl.org
56multi.uribl.com (result 127.0.0.2 = spam resource)
56multi.uribl.com (union of all results)
48dsn.rfc-ignorant.org (zone not intended for this use)
39bogusmx.rfc-ignorant.org
29bulk.rhs.mailpolice.com
29dob.sibl.support-intelligence.net
28rhsbl.ahbl.org
17fresh.spameatingmonkey.net
15hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
11porn.rhs.mailpolice.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
69709(total number of domains tested, including 176 at SDSC)
65250hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
17574(union of most domain zones)
8996hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7197whois.rfc-ignorant.org (union of all results)
6704whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5851hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
5060abuse.rfc-ignorant.org
2955l1.apews.org
2855hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2542urired.spameatingmonkey.net
1789hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1468postmaster.rfc-ignorant.org
1332bogusmx.rfc-ignorant.org
1254multi.surbl.org
1053multi.uribl.com (union of all results)
1040multi.uribl.com (result 127.0.0.2 = spam resource)
984webmail.rhs.mailpolice.com
920hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
556hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
497dsn.rfc-ignorant.org
493whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
449dynamic.rhs.mailpolice.com
341adv.rhs.mailpolice.com
215porn.rhs.mailpolice.com
97bulk.rhs.mailpolice.com
56hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
45hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
42dob.sibl.support-intelligence.net
31hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
24rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
24rhsbl.sorbs.net (union of all results)
17rhsbl.ahbl.org
14ex.dnsbl.org
12fresh.spameatingmonkey.net
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2fraud.rhs.mailpolice.com
2bl.deadbeef.com
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 29 October 2009.