Blacklists Compared

9 August 2008

[ 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 (127.0.0.1 result), 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
166941(total number of IP addresses tested, including 477 at SDSC)
161252(union of most IP zones)
145808zen.spamhaus.org (union of all results)
138014l2.apews.org
130178t1.dnsbl.net.au
106628cbl.abuseat.org
106548zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
92797dnsbl-3.uceprotect.net
90619zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
85637dnsbl-2.uceprotect.net
84606dnsbl-1.uceprotect.net
80706psbl.surriel.com
68520dnsbl.sorbs.net (union of all results)
67713hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
50849dnsbl.sorbs.net (result 127.0.0.10 = dialup)
50040no-more-funn.moensted.dk (union of all results)
45830blackholes.five-ten-sg.com (union of all results)
43301ubl.unsubscore.com
41715blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
39173no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
35020bl.spamcop.net
30791ix.dnsbl.manitu.net
28999db.wpbl.info
23178zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
17462dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
12460sbl.csma.biz
11366bl.csma.biz
10813spam.dnsbl.sorbs.net
10812bl.spamcannibal.org
9992no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
9422tr.countries.nerd.dk
9161countries.blackholes.us (result 127.0.7.6 = Brazil)
8034countries.blackholes.us (result 127.6.4.3 = Russia)
7460dnsbl.inps.de
7322countries.blackholes.us (result 127.1.5.6 = China)
7284hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
7050countries.blackholes.us (result 127.7.9.2 = Turkey)
6765mail-abuse.blacklist.jippg.org
4472dnsbl.njabl.org (union of all results)
4318countries.blackholes.us (result 127.0.3.2 = Argentina)
4314spamsources.fabel.dk
3960korea.services.net
3863dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3801ips.backscatterer.org
3785list.dnswl.org (not a blacklist!)
3263countries.blackholes.us (result 127.4.1.0 = Korea)
3027blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2551countries.blackholes.us (result 127.7.6.4 = Thailand)
2424hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2373rmst.dnsbl.net.au
2277dnsbl.ahbl.org (union of all results)
2053dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2022countries.blackholes.us (result 127.4.8.4 = Mexico)
1042blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1014zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
796aspews.ext.sorbs.net
785countries.blackholes.us (result 127.1.5.8 = Taiwan)
730countries.blackholes.us (result 127.3.9.2 = Japan)
478no-more-funn.moensted.dk (result 127.0.0.9 = misc)
462zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
422dnsbl.njabl.org (result 127.0.0.4 = spam source)
355countries.blackholes.us (result 127.7.0.2 = Singapore)
309countries.blackholes.us (result 127.3.4.4 = Hong Kong)
280query.bondedsender.org (not a blacklist!)
279no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
276probes.dnsbl.net.au
260hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
237work.drbl.croco.net
211countries.blackholes.us (result 127.4.5.8 = Malaysia)
205dnsbl.sorbs.net (result 127.0.0.6 = spam source)
187dnsbl.njabl.org (result 127.0.0.2 = open relay)
178no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
176accredit.habeas.com (not a blacklist!)
173bl.deadbeef.com
161dnsbl.ahbl.org (result 127.0.0.4 = spam source)
147iadb2.isipp.com (not a blacklist!)
135iadb.isipp.com (not a blacklist!)
98tor.dnsbl.sectoor.de (union of all results)
97tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
95dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
88dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
85multi.surbl.org
34countries.blackholes.us (result 127.5.6.6 = Nigeria)
26blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
25exemptions.ahbl.org (not a blacklist!)
25dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
22dnsbl.ahbl.org (result 127.0.0.15 = open relay)
20blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
14dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
13rdts.dnsbl.net.au
11spam.wytnij.to
10dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
10spamguard.leadmon.net (union of all results)
7spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
6dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2ohps.dnsbl.net.au
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
2multi.uribl.com (union of all results)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1dob.sibl.support-intelligence.net


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses.

HitsDNS Zone
166941(total number of IP addresses whose names were tested, including 477 at SDSC)
97625(union of all domain zones)
78657l1.apews.org
71453abuse.rfc-ignorant.org
54354rddn.dnsbl.net.au
39043whois.rfc-ignorant.org (union of all results)
35575dynamic.rhs.mailpolice.com
27121whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
11922whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
6593webmail.rhs.mailpolice.com
586adv.rhs.mailpolice.com
496bl.deadbeef.com
274multi.surbl.org
258multi.uribl.com (result 127.0.0.2 = spam resource)
258multi.uribl.com (union of all results)
179bulk.rhs.mailpolice.com
77postmaster.rfc-ignorant.org
76rhsbl.ahbl.org
63bogusmx.rfc-ignorant.org
59dsn.rfc-ignorant.org (zone not intended for this use)
44dob.sibl.support-intelligence.net
37rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
37rhsbl.sorbs.net (union of all results)
1porn.rhs.mailpolice.com


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains.

HitsDNS Zone
130655(total number of domains tested, including 437 at SDSC)
25941(union of all domain zones)
12723whois.rfc-ignorant.org (union of all results)
12043whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5243bogusmx.rfc-ignorant.org
4373abuse.rfc-ignorant.org
2560postmaster.rfc-ignorant.org
1563multi.surbl.org
1420l1.apews.org
1387multi.uribl.com (union of all results)
1322multi.uribl.com (result 127.0.0.2 = spam resource)
1207webmail.rhs.mailpolice.com
920dsn.rfc-ignorant.org
680whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
482porn.rhs.mailpolice.com
308adv.rhs.mailpolice.com
168rhsbl.ahbl.org
144bulk.rhs.mailpolice.com
101rddn.dnsbl.net.au (zone not intended for this use)
92dynamic.rhs.mailpolice.com
64dob.sibl.support-intelligence.net
63multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
45rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
45rhsbl.sorbs.net (union of all results)
17ex.dnsbl.org
3bl.deadbeef.com
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1fraud.rhs.mailpolice.com
1cart00ney.surriel.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 14 August 2008.