Blacklists Compared

8 November 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
138215(total number of IP addresses tested, including 490 at SDSC)
132428(union of most IP zones)
112963zen.spamhaus.org (union of all results)
97792t1.dnsbl.net.au
94297b.barracudacentral.org
75528cbl.abuseat.org
75424zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
68866zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
64110dnsbl-3.uceprotect.net
63914hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
59091dnsbl-1.uceprotect.net
58302dnsbl-2.uceprotect.net
56994dnsbl.sorbs.net (union of all results)
52203psbl.surriel.com
46595dnsbl.sorbs.net (result 127.0.0.10 = dialup)
44152no-more-funn.moensted.dk (union of all results)
36937blackholes.five-ten-sg.com (union of all results)
33390blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
31614no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
30866ubl.unsubscore.com
24711bl.spamcop.net
23148zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
14844db.wpbl.info
12370ix.dnsbl.manitu.net
10935spam.dnsbl.sorbs.net
10800no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
10275dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
8706countries.blackholes.us (result 127.1.5.6 = China)
7827bl.spamcannibal.org
7191dnsbl.inps.de
6078tr.countries.nerd.dk
5716countries.blackholes.us (result 127.6.4.3 = Russia)
5459countries.blackholes.us (result 127.0.7.6 = Brazil)
5298ips.backscatterer.org
4225countries.blackholes.us (result 127.7.9.2 = Turkey)
4221list.dnswl.org (not a blacklist!)
4042korea.services.net
4033spamsources.fabel.dk
3198countries.blackholes.us (result 127.4.1.0 = Korea)
2902hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2780mail-abuse.blacklist.jippg.org
2498hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2466blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2356rmst.dnsbl.net.au
2272dnsbl.njabl.org (union of all results)
2191sbl.csma.biz
2138bl.csma.biz
1862dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1767countries.blackholes.us (result 127.0.3.2 = Argentina)
1469countries.blackholes.us (result 127.3.9.2 = Japan)
1412countries.blackholes.us (result 127.7.6.4 = Thailand)
1038no-more-funn.moensted.dk (result 127.0.0.9 = misc)
1030blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
996aspews.ext.sorbs.net
773countries.blackholes.us (result 127.1.5.8 = Taiwan)
599no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
471countries.blackholes.us (result 127.4.8.4 = Mexico)
342dnsbl.njabl.org (result 127.0.0.4 = spam source)
319zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
307query.bondedsender.org (not a blacklist!)
240countries.blackholes.us (result 127.3.4.4 = Hong Kong)
237countries.blackholes.us (result 127.7.0.2 = Singapore)
229hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
215zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
195accredit.habeas.com (not a blacklist!)
153no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
142iadb2.isipp.com (not a blacklist!)
129dnsbl.sorbs.net (result 127.0.0.6 = spam source)
124work.drbl.croco.net
123countries.blackholes.us (result 127.4.5.8 = Malaysia)
117tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
117tor.dnsbl.sectoor.de (union of all results)
103probes.dnsbl.net.au
98iadb.isipp.com (not a blacklist!)
89bl.deadbeef.com
68dnsbl.njabl.org (result 127.0.0.2 = open relay)
55l2.bbfh.ext.sorbs.net
47dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
37multi.surbl.org
33dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
33blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
33l2.apews.org
22exemptions.ahbl.org (not a blacklist!)
17blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
11dnsbl-0.uceprotect.net
11spamguard.leadmon.net (union of all results)
9spam.wytnij.to
6countries.blackholes.us (result 127.5.6.6 = Nigeria)
6dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
6spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
5multi.uribl.com (union of all results)
4multi.uribl.com (result 127.0.0.2 = spam resource)
4dnsbl.sorbs.net (result 127.0.0.5 = open relay)
4spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2rdts.dnsbl.net.au
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1dob.sibl.support-intelligence.net
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.

HitsDNS Zone
138215(total number of IP addresses whose names were tested, including 490 at SDSC)
79809(union of all domain zones)
56254abuse.rfc-ignorant.org
51345rddn.dnsbl.net.au
32752dynamic.rhs.mailpolice.com
30114whois.rfc-ignorant.org (union of all results)
23313l1.apews.org
17963whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
12151whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5033webmail.rhs.mailpolice.com
706adv.rhs.mailpolice.com
268bl.deadbeef.com
127multi.surbl.org
86multi.uribl.com (union of all results)
83multi.uribl.com (result 127.0.0.2 = spam resource)
78postmaster.rfc-ignorant.org
64bogusmx.rfc-ignorant.org
56dsn.rfc-ignorant.org (zone not intended for this use)
35bulk.rhs.mailpolice.com
33rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
33rhsbl.sorbs.net (union of all results)
5porn.rhs.mailpolice.com
4dob.sibl.support-intelligence.net
2multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1ex.dnsbl.org


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

HitsDNS Zone
99034(total number of domains tested, including 440 at SDSC)
20403(union of all domain zones)
10981whois.rfc-ignorant.org (union of all results)
10393whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3824abuse.rfc-ignorant.org
3508bogusmx.rfc-ignorant.org
2004postmaster.rfc-ignorant.org
1088multi.surbl.org
979webmail.rhs.mailpolice.com
759multi.uribl.com (union of all results)
756dsn.rfc-ignorant.org
715multi.uribl.com (result 127.0.0.2 = spam resource)
588whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
322porn.rhs.mailpolice.com
288adv.rhs.mailpolice.com
112bulk.rhs.mailpolice.com
50rddn.dnsbl.net.au (zone not intended for this use)
42dynamic.rhs.mailpolice.com
41rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
41rhsbl.sorbs.net (union of all results)
40multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
40dob.sibl.support-intelligence.net
17l1.apews.org
13ex.dnsbl.org
5fraud.rhs.mailpolice.com
4multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
3bl.deadbeef.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 13 November 2008.