Blacklists Compared

23 May 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
120099(total number of IP addresses tested, including 204 at SDSC)
116580(union of most IP zones)
102202zen.spamhaus.org (union of all results)
100797l2.apews.org
89567t1.dnsbl.net.au
82403b.barracudacentral.org
72609zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
72599cbl.abuseat.org
67798dnsbl-3.uceprotect.net
67650dnsbl-2.uceprotect.net
65991hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
62432dnsbl.sorbs.net (union of all results)
61656zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
59338dnsbl-1.uceprotect.net
53590psbl.surriel.com
49384ubl.unsubscore.com
40805dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
31836hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
30882blackholes.five-ten-sg.com (union of all results)
30400no-more-funn.moensted.dk (union of all results)
28822dnsbl.sorbs.net (result 127.0.0.10 = dialup)
27319blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
25733bl.spamcop.net
22564db.wpbl.info
21272no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
20923zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
15703ix.dnsbl.manitu.net
13034spam.dnsbl.sorbs.net
11347hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8579dnsbl.inps.de
8175no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
8164mail-abuse.blacklist.jippg.org
7217tr.countries.nerd.dk
6675bl.spamcannibal.org
5895korea.services.net
5685ips.backscatterer.org
3875list.dnswl.org (not a blacklist!)
3555spamsources.fabel.dk
3273hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3083hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2397blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
1940hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1823dnsbl.njabl.org (union of all results)
1547dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1536rmst.dnsbl.net.au
1143blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
993l2.bbfh.ext.sorbs.net
887aspews.ext.sorbs.net
583hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
502no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
406no-more-funn.moensted.dk (result 127.0.0.9 = misc)
406query.bondedsender.org (not a blacklist!)
334dnsbl.sorbs.net (result 127.0.0.6 = spam source)
239zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
224l1.bbfh.ext.sorbs.net
201accredit.habeas.com (not a blacklist!)
175dnsbl.njabl.org (result 127.0.0.4 = spam source)
170iadb2.isipp.com (not a blacklist!)
128iadb.isipp.com (not a blacklist!)
101dnsbl.njabl.org (result 127.0.0.2 = open relay)
85no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
78tor.dnsbl.sectoor.de (union of all results)
77tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
63spamguard.leadmon.net (union of all results)
59spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
57bl.deadbeef.com
51probes.dnsbl.net.au
49zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
46dnsbl.ahbl.org (union of all results)
38dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
28dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
25dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
23blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
17dnsbl-0.uceprotect.net
8dnsbl.ahbl.org (result 127.0.0.4 = spam source)
6multi.surbl.org
6rdts.dnsbl.net.au
5multi.uribl.com (result 127.0.0.2 = spam resource)
5multi.uribl.com (union of all results)
4hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
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
120099(total number of IP addresses whose names were tested, including 204 at SDSC)
76024hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
69387hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
62297(union of most domain zones)
53680l1.apews.org
46729hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
44842abuse.rfc-ignorant.org
35934rddn.dnsbl.net.au
22776dynamic.rhs.mailpolice.com
20576whois.rfc-ignorant.org (union of all results)
11745whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
8831whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3573hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3519webmail.rhs.mailpolice.com
2178hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
720adv.rhs.mailpolice.com
549rhsbl.ahbl.org
375hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
311bl.deadbeef.com
291hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
117hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
80multi.surbl.org
65postmaster.rfc-ignorant.org
60bogusmx.rfc-ignorant.org
48dsn.rfc-ignorant.org (zone not intended for this use)
45multi.uribl.com (result 127.0.0.2 = spam resource)
45multi.uribl.com (union of all results)
37rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
37rhsbl.sorbs.net (union of all results)
21hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
18dob.sibl.support-intelligence.net
15bulk.rhs.mailpolice.com
9porn.rhs.mailpolice.com
1ex.dnsbl.org


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
70552(total number of domains tested, including 169 at SDSC)
59110hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16034(union of most domain zones)
7807hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6284whois.rfc-ignorant.org (union of all results)
5916hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
5771whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3632bogusmx.rfc-ignorant.org
3463abuse.rfc-ignorant.org
2917hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2757hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2361postmaster.rfc-ignorant.org
1842hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1678l1.apews.org
1278webmail.rhs.mailpolice.com
1074multi.uribl.com (union of all results)
1044multi.uribl.com (result 127.0.0.2 = spam resource)
899multi.surbl.org
878hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
520dsn.rfc-ignorant.org
513whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
306adv.rhs.mailpolice.com
271porn.rhs.mailpolice.com
167bulk.rhs.mailpolice.com
100rhsbl.ahbl.org
85rddn.dnsbl.net.au (zone not intended for this use)
45dynamic.rhs.mailpolice.com
38hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
37hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
35rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
35rhsbl.sorbs.net (union of all results)
28multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
11ex.dnsbl.org
4dob.sibl.support-intelligence.net
3bl.deadbeef.com
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2fraud.rhs.mailpolice.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 30 May 2009.