Blacklists Compared

26 July 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
169044(total number of IP addresses tested, including 485 at SDSC)
160822(union of most IP zones)
136725l2.apews.org
135640zen.spamhaus.org (union of all results)
120724t1.dnsbl.net.au
92909cbl.abuseat.org
92769zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
84959zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
82657dnsbl-3.uceprotect.net
77099dnsbl-2.uceprotect.net
71833psbl.surriel.com
67484dnsbl-1.uceprotect.net
65531dnsbl.sorbs.net (union of all results)
60298hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
51710no-more-funn.moensted.dk (union of all results)
49984dnsbl.sorbs.net (result 127.0.0.10 = dialup)
49591blackholes.five-ten-sg.com (union of all results)
44884blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
39150no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
38663ubl.unsubscore.com
30907bl.spamcop.net
30754ix.dnsbl.manitu.net
22328zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
19586db.wpbl.info
15100dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
12873spam.dnsbl.sorbs.net
12140no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
10997countries.blackholes.us (result 127.0.7.6 = Brazil)
10959bl.spamcannibal.org
8971sbl.csma.biz
8728countries.blackholes.us (result 127.1.5.6 = China)
8612ips.backscatterer.org
7985tr.countries.nerd.dk
7776bl.csma.biz
7646hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
7581countries.blackholes.us (result 127.6.4.3 = Russia)
6816dnsbl.inps.de
6289mail-abuse.blacklist.jippg.org
6067countries.blackholes.us (result 127.7.9.2 = Turkey)
4709korea.services.net
4694rmst.dnsbl.net.au
4675list.dnswl.org (not a blacklist!)
4405dnsbl.njabl.org (union of all results)
4087countries.blackholes.us (result 127.0.3.2 = Argentina)
3894countries.blackholes.us (result 127.4.1.0 = Korea)
3816dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3518blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
3333spamsources.fabel.dk
2858hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2442countries.blackholes.us (result 127.7.6.4 = Thailand)
2235dnsbl.ahbl.org (union of all results)
2034dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1680countries.blackholes.us (result 127.3.9.2 = Japan)
1374countries.blackholes.us (result 127.4.8.4 = Mexico)
1165aspews.ext.sorbs.net
1126blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1044countries.blackholes.us (result 127.1.5.8 = Taiwan)
993zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
542dnsbl.sorbs.net (result 127.0.0.6 = spam source)
517zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
413dnsbl.njabl.org (result 127.0.0.4 = spam source)
348countries.blackholes.us (result 127.7.0.2 = Singapore)
346hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
339countries.blackholes.us (result 127.3.4.4 = Hong Kong)
287countries.blackholes.us (result 127.4.5.8 = Malaysia)
277query.bondedsender.org (not a blacklist!)
261probes.dnsbl.net.au
261work.drbl.croco.net
237no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
208no-more-funn.moensted.dk (result 127.0.0.9 = misc)
200accredit.habeas.com (not a blacklist!)
176dnsbl.njabl.org (result 127.0.0.2 = open relay)
164iadb2.isipp.com (not a blacklist!)
156bl.deadbeef.com
154tor.dnsbl.sectoor.de (union of all results)
152tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
151iadb.isipp.com (not a blacklist!)
141dnsbl.ahbl.org (result 127.0.0.4 = spam source)
118dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
117dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
117no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
90multi.surbl.org
47exemptions.ahbl.org (not a blacklist!)
34blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
27blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
23countries.blackholes.us (result 127.5.6.6 = Nigeria)
21dnsbl.ahbl.org (result 127.0.0.15 = open relay)
21dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
17dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
14rdts.dnsbl.net.au
14spamguard.leadmon.net (union of all results)
11dnsbl.sorbs.net (result 127.0.0.5 = open relay)
10dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
8spam.wytnij.to
8spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
6multi.uribl.com (result 127.0.0.2 = spam resource)
6multi.uribl.com (union of all results)
3spamguard.leadmon.net (result 127.0.0.3 = spam source)
3spamguard.leadmon.net (result 127.0.0.8 = open proxy)
3no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2ohps.dnsbl.net.au
2blackholes.brainerd.net
2dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
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
169044(total number of IP addresses whose names were tested, including 485 at SDSC)
97947(union of all domain zones)
79366l1.apews.org
71604abuse.rfc-ignorant.org
53911rddn.dnsbl.net.au
37209whois.rfc-ignorant.org (union of all results)
35371dynamic.rhs.mailpolice.com
25286whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
11924whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
6635webmail.rhs.mailpolice.com
588adv.rhs.mailpolice.com
535bl.deadbeef.com
412multi.uribl.com (union of all results)
411multi.uribl.com (result 127.0.0.2 = spam resource)
406multi.surbl.org
97rhsbl.ahbl.org
93postmaster.rfc-ignorant.org
92bogusmx.rfc-ignorant.org
74dsn.rfc-ignorant.org (zone not intended for this use)
74bulk.rhs.mailpolice.com
41rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
41rhsbl.sorbs.net (union of all results)
21porn.rhs.mailpolice.com
21dob.sibl.support-intelligence.net
1multi.uribl.com (result 127.0.0.4 = opt-out spam resource)


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

HitsDNS Zone
124195(total number of domains tested, including 425 at SDSC)
25928(union of all domain zones)
12894whois.rfc-ignorant.org (union of all results)
12263whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5096bogusmx.rfc-ignorant.org
4315abuse.rfc-ignorant.org
2233postmaster.rfc-ignorant.org
1707multi.surbl.org
1700multi.uribl.com (union of all results)
1658l1.apews.org
1644multi.uribl.com (result 127.0.0.2 = spam resource)
1074webmail.rhs.mailpolice.com
883dsn.rfc-ignorant.org
631whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
456porn.rhs.mailpolice.com
301adv.rhs.mailpolice.com
245dob.sibl.support-intelligence.net
169rhsbl.ahbl.org
166bulk.rhs.mailpolice.com
161rddn.dnsbl.net.au (zone not intended for this use)
153dynamic.rhs.mailpolice.com
54multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
40rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
40rhsbl.sorbs.net (union of all results)
15ex.dnsbl.org
4bl.deadbeef.com
3fraud.rhs.mailpolice.com
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 31 July 2008.