Blacklists Compared

12 April 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
215830(total number of IP addresses tested, including 465 at SDSC)
198414(union of most IP zones)
172630l2.apews.org
156020zen.spamhaus.org (union of all results)
135429t1.dnsbl.net.au
106331dnsbl-3.uceprotect.net
100290zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
93524dnsbl-2.uceprotect.net
87622psbl.surriel.com
87136cbl.abuseat.org
87093zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
84488dnsbl-1.uceprotect.net
80649dnsbl.sorbs.net (union of all results)
74932no-more-funn.moensted.dk (union of all results)
70233blackholes.five-ten-sg.com (union of all results)
68335dnsbl.sorbs.net (result 127.0.0.10 = dialup)
64464blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
63568hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
53024no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
32418bl.spamcop.net
32211ix.dnsbl.manitu.net
29619zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
26831db.wpbl.info
19496no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
17361countries.blackholes.us (result 127.1.5.6 = China)
15724ubl.unsubscore.com
14534unconfirmed.dsbl.org
14360list.dsbl.org
14347dsbl.dnsbl.net.au
14054ips.backscatterer.org
12388dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
12166bl.spamcannibal.org
11210mail-abuse.blacklist.jippg.org
11006tr.countries.nerd.dk
9698bl.csma.biz
9610sbl.csma.biz
8907countries.blackholes.us (result 127.7.9.2 = Turkey)
8517countries.blackholes.us (result 127.6.4.3 = Russia)
8386countries.blackholes.us (result 127.0.7.6 = Brazil)
7373hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
5184list.dnswl.org (not a blacklist!)
5089korea.services.net
4587blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4414countries.blackholes.us (result 127.4.1.0 = Korea)
4392dnsbl.njabl.org (union of all results)
3971dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3459spamsources.fabel.dk
3249countries.blackholes.us (result 127.0.3.2 = Argentina)
3049hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2892countries.blackholes.us (result 127.3.9.2 = Japan)
2734dnsbl.ahbl.org (union of all results)
2486dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2337rmst.dnsbl.net.au
1727countries.blackholes.us (result 127.4.8.4 = Mexico)
1684countries.blackholes.us (result 127.7.6.4 = Thailand)
1682no-more-funn.moensted.dk (result 127.0.0.9 = misc)
1623aspews.ext.sorbs.net
1114blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1039zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
944dnsbl.sorbs.net (result 127.0.0.6 = spam source)
783countries.blackholes.us (result 127.1.5.8 = Taiwan)
741hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
604countries.blackholes.us (result 127.4.5.8 = Malaysia)
556zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
531countries.blackholes.us (result 127.3.4.4 = Hong Kong)
489no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
394probes.dnsbl.net.au
337countries.blackholes.us (result 127.7.0.2 = Singapore)
329dnsbl.njabl.org (result 127.0.0.4 = spam source)
314no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
304tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
304tor.dnsbl.sectoor.de (union of all results)
274query.bondedsender.org (not a blacklist!)
268dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
259work.drbl.croco.net
231dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
220bl.deadbeef.com
207accredit.habeas.com (not a blacklist!)
142multi.surbl.org
140iadb2.isipp.com (not a blacklist!)
140multihop.dsbl.org
123iadb.isipp.com (not a blacklist!)
118dnsbl.ahbl.org (result 127.0.0.4 = spam source)
91dnsbl.njabl.org (result 127.0.0.2 = open relay)
87dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
78relays.nether.net
77dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
65ricn.dnsbl.net.au
65exemptions.ahbl.org (not a blacklist!)
34blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
32blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
24dnsbl.ahbl.org (result 127.0.0.15 = open relay)
22rdts.dnsbl.net.au
21dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
19countries.blackholes.us (result 127.5.6.6 = Nigeria)
18spamguard.leadmon.net (union of all results)
12blackholes.brainerd.net
9ohps.dnsbl.net.au
9spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
7multi.uribl.com (result 127.0.0.2 = spam resource)
7multi.uribl.com (union of all results)
6spam.wytnij.to
6dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
4spamguard.leadmon.net (result 127.0.0.3 = spam source)
4spamguard.leadmon.net (result 127.0.0.8 = open proxy)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2owps.dnsbl.net.au
2no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
2dnsbl.ahbl.org (result 127.0.0.11 = no postmaster or abuse e-mail)
1spamsites.dnsbl.net.au
1osps.dnsbl.net.au
1osrs.dnsbl.net.au
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1spamguard.leadmon.net (result 127.0.0.5 = open relay)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
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
215830(total number of IP addresses whose names were tested, including 465 at SDSC)
123554(union of all domain zones)
101697l1.apews.org
83384abuse.rfc-ignorant.org
73018rddn.dnsbl.net.au
46103dynamic.rhs.mailpolice.com
45518whois.rfc-ignorant.org (union of all results)
29173whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
16346whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
8445webmail.rhs.mailpolice.com
703multi.surbl.org
596adv.rhs.mailpolice.com
567dob.sibl.support-intelligence.net
567multi.uribl.com (union of all results)
566multi.uribl.com (result 127.0.0.2 = spam resource)
149bl.deadbeef.com
138bogusmx.rfc-ignorant.org
119postmaster.rfc-ignorant.org
111rhsbl.ahbl.org
80dsn.rfc-ignorant.org (zone not intended for this use)
57bulk.rhs.mailpolice.com
32porn.rhs.mailpolice.com
30rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
30rhsbl.sorbs.net (union of all results)
2blackhole.securitysage.com
2ex.dnsbl.org
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
151143(total number of domains tested, including 424 at SDSC)
36009(union of all domain zones)
19554whois.rfc-ignorant.org (union of all results)
18869whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
7845bogusmx.rfc-ignorant.org
4854abuse.rfc-ignorant.org
1963multi.surbl.org
1923postmaster.rfc-ignorant.org
1817multi.uribl.com (union of all results)
1761multi.uribl.com (result 127.0.0.2 = spam resource)
1688l1.apews.org
1146webmail.rhs.mailpolice.com
1064dsn.rfc-ignorant.org
685whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
469porn.rhs.mailpolice.com
236adv.rhs.mailpolice.com
195bulk.rhs.mailpolice.com
169rhsbl.ahbl.org
168blackhole.securitysage.com
123rddn.dnsbl.net.au (zone not intended for this use)
112dynamic.rhs.mailpolice.com
58rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
58rhsbl.sorbs.net (union of all results)
51multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
18dob.sibl.support-intelligence.net
13ex.dnsbl.org
8fraud.rhs.mailpolice.com
5multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
5bl.deadbeef.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 18 April 2008.