Blacklists Compared

11 October 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
173176(total number of IP addresses tested, including 460 at SDSC)
165135(union of most IP zones)
140319zen.spamhaus.org (union of all results)
127249t1.dnsbl.net.au
91610cbl.abuseat.org
91493zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
86986zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
83434dnsbl-1.uceprotect.net
80999dnsbl.sorbs.net (union of all results)
80871dnsbl-3.uceprotect.net
78657hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
74126dnsbl-2.uceprotect.net
73429psbl.surriel.com
55991dnsbl.sorbs.net (result 127.0.0.10 = dialup)
45819no-more-funn.moensted.dk (union of all results)
45506ubl.unsubscore.com
40041blackholes.five-ten-sg.com (union of all results)
36742blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
35505ix.dnsbl.manitu.net
35045no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
32704db.wpbl.info
31011bl.spamcop.net
26518zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
24802dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
12953spam.dnsbl.sorbs.net
10304bl.spamcannibal.org
9497dnsbl.inps.de
8936ips.backscatterer.org
8649countries.blackholes.us (result 127.1.5.6 = China)
8475tr.countries.nerd.dk
8117no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
7532countries.blackholes.us (result 127.0.7.6 = Brazil)
6244countries.blackholes.us (result 127.6.4.3 = Russia)
6140countries.blackholes.us (result 127.7.9.2 = Turkey)
6022korea.services.net
4973mail-abuse.blacklist.jippg.org
4854countries.blackholes.us (result 127.4.1.0 = Korea)
4738list.dnswl.org (not a blacklist!)
4243spamsources.fabel.dk
3285dnsbl.njabl.org (union of all results)
3057hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2880countries.blackholes.us (result 127.0.3.2 = Argentina)
2745hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2551dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2436blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2355countries.blackholes.us (result 127.3.9.2 = Japan)
2319rmst.dnsbl.net.au
2238no-more-funn.moensted.dk (result 127.0.0.9 = misc)
1816countries.blackholes.us (result 127.7.6.4 = Thailand)
1356aspews.ext.sorbs.net
1239countries.blackholes.us (result 127.4.8.4 = Mexico)
1067sbl.csma.biz
993bl.csma.biz
906countries.blackholes.us (result 127.1.5.8 = Taiwan)
822blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
544dnsbl.njabl.org (result 127.0.0.4 = spam source)
446zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
392countries.blackholes.us (result 127.7.0.2 = Singapore)
344dnsbl.sorbs.net (result 127.0.0.6 = spam source)
328countries.blackholes.us (result 127.3.4.4 = Hong Kong)
326zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
291no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
269query.bondedsender.org (not a blacklist!)
233hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
189dnsbl.njabl.org (result 127.0.0.2 = open relay)
185no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
181accredit.habeas.com (not a blacklist!)
169countries.blackholes.us (result 127.4.5.8 = Malaysia)
161work.drbl.croco.net
150probes.dnsbl.net.au
131tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
131tor.dnsbl.sectoor.de (union of all results)
122iadb2.isipp.com (not a blacklist!)
99bl.deadbeef.com
81iadb.isipp.com (not a blacklist!)
71dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
61dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
55multi.surbl.org
54l2.apews.org
53l2.bbfh.ext.sorbs.net
39exemptions.ahbl.org (not a blacklist!)
28dnsbl-0.uceprotect.net
25blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
17countries.blackholes.us (result 127.5.6.6 = Nigeria)
15blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
13spamguard.leadmon.net (union of all results)
10spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
7rdts.dnsbl.net.au
5spam.wytnij.to
5dnsbl.sorbs.net (result 127.0.0.5 = open relay)
5dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
3multi.uribl.com (result 127.0.0.2 = spam resource)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3blackholes.brainerd.net
3multi.uribl.com (union of all results)
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
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
173176(total number of IP addresses whose names were tested, including 460 at SDSC)
98343(union of all domain zones)
70946abuse.rfc-ignorant.org
61822rddn.dnsbl.net.au
39634whois.rfc-ignorant.org (union of all results)
39300dynamic.rhs.mailpolice.com
26223l1.apews.org
23891whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
15743whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
7283webmail.rhs.mailpolice.com
716adv.rhs.mailpolice.com
432bl.deadbeef.com
145multi.surbl.org
106postmaster.rfc-ignorant.org
97bogusmx.rfc-ignorant.org
79multi.uribl.com (union of all results)
77multi.uribl.com (result 127.0.0.2 = spam resource)
75dsn.rfc-ignorant.org (zone not intended for this use)
67rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
67rhsbl.sorbs.net (union of all results)
52bulk.rhs.mailpolice.com
30dob.sibl.support-intelligence.net
12porn.rhs.mailpolice.com
2multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
1ex.dnsbl.org


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

HitsDNS Zone
133555(total number of domains tested, including 404 at SDSC)
28898(union of all domain zones)
16722whois.rfc-ignorant.org (union of all results)
16013whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4989bogusmx.rfc-ignorant.org
4788abuse.rfc-ignorant.org
2375postmaster.rfc-ignorant.org
1230multi.surbl.org
1165webmail.rhs.mailpolice.com
995multi.uribl.com (union of all results)
937multi.uribl.com (result 127.0.0.2 = spam resource)
913dsn.rfc-ignorant.org
709whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
453porn.rhs.mailpolice.com
310adv.rhs.mailpolice.com
140bulk.rhs.mailpolice.com
65rddn.dnsbl.net.au (zone not intended for this use)
56multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
49dynamic.rhs.mailpolice.com
46rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
46rhsbl.sorbs.net (union of all results)
16l1.apews.org
15ex.dnsbl.org
9dob.sibl.support-intelligence.net
3fraud.rhs.mailpolice.com
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2bl.deadbeef.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 17 October 2008.