Blacklists Compared

27 September 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
165034(total number of IP addresses tested, including 459 at SDSC)
157228(union of most IP zones)
126067zen.spamhaus.org (union of all results)
114452t1.dnsbl.net.au
81593cbl.abuseat.org
81466zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
81133dnsbl-1.uceprotect.net
79624zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
79241psbl.surriel.com
73936dnsbl-3.uceprotect.net
69663dnsbl.sorbs.net (union of all results)
67853hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
66219dnsbl-2.uceprotect.net
50223dnsbl.sorbs.net (result 127.0.0.10 = dialup)
49022no-more-funn.moensted.dk (union of all results)
45921ubl.unsubscore.com
41564blackholes.five-ten-sg.com (union of all results)
37337blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
35093db.wpbl.info
34739no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
30574bl.spamcop.net
28643ix.dnsbl.manitu.net
23328zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
19325dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
12279spam.dnsbl.sorbs.net
12056no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
11144ips.backscatterer.org
10103bl.spamcannibal.org
9699dnsbl.inps.de
9548countries.blackholes.us (result 127.6.4.3 = Russia)
8823mail-abuse.blacklist.jippg.org
8589countries.blackholes.us (result 127.1.5.6 = China)
6973tr.countries.nerd.dk
6709countries.blackholes.us (result 127.0.7.6 = Brazil)
5630korea.services.net
5268hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
5112countries.blackholes.us (result 127.7.9.2 = Turkey)
4719list.dnswl.org (not a blacklist!)
4523countries.blackholes.us (result 127.4.1.0 = Korea)
4271spamsources.fabel.dk
3230hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3181blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
3082dnsbl.njabl.org (union of all results)
2319dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2285rmst.dnsbl.net.au
2276countries.blackholes.us (result 127.0.3.2 = Argentina)
1778countries.blackholes.us (result 127.7.6.4 = Thailand)
1777no-more-funn.moensted.dk (result 127.0.0.9 = misc)
1707countries.blackholes.us (result 127.3.9.2 = Japan)
1602aspews.ext.sorbs.net
1021countries.blackholes.us (result 127.4.8.4 = Mexico)
996blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
890countries.blackholes.us (result 127.1.5.8 = Taiwan)
641l2.bbfh.ext.sorbs.net
578dnsbl.njabl.org (result 127.0.0.4 = spam source)
386countries.blackholes.us (result 127.3.4.4 = Hong Kong)
382countries.blackholes.us (result 127.7.0.2 = Singapore)
327zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
317zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
291query.bondedsender.org (not a blacklist!)
275hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
270work.drbl.croco.net
259no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
246no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
214countries.blackholes.us (result 127.4.5.8 = Malaysia)
194accredit.habeas.com (not a blacklist!)
184dnsbl.njabl.org (result 127.0.0.2 = open relay)
167iadb2.isipp.com (not a blacklist!)
161l1.bbfh.ext.sorbs.net
156probes.dnsbl.net.au
129iadb.isipp.com (not a blacklist!)
104tor.dnsbl.sectoor.de (union of all results)
103tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
101bl.deadbeef.com
98dnsbl.sorbs.net (result 127.0.0.6 = spam source)
57dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
54dnsbl-0.uceprotect.net
54dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
48multi.surbl.org
35exemptions.ahbl.org (not a blacklist!)
26blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
23blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
13spamguard.leadmon.net (union of all results)
12rdts.dnsbl.net.au
9dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
8countries.blackholes.us (result 127.5.6.6 = Nigeria)
7dnsbl.sorbs.net (result 127.0.0.5 = open relay)
6spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
6spamguard.leadmon.net (result 127.0.0.8 = open proxy)
5spam.wytnij.to
4blackholes.brainerd.net
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
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 127.0.0.8 = open web form)
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
165034(total number of IP addresses whose names were tested, including 459 at SDSC)
88664(union of all domain zones)
62664abuse.rfc-ignorant.org
54682rddn.dnsbl.net.au
34199dynamic.rhs.mailpolice.com
33651whois.rfc-ignorant.org (union of all results)
20846whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
12805whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
6734webmail.rhs.mailpolice.com
745adv.rhs.mailpolice.com
426multi.surbl.org
340bl.deadbeef.com
249multi.uribl.com (union of all results)
248multi.uribl.com (result 127.0.0.2 = spam resource)
217bulk.rhs.mailpolice.com
118postmaster.rfc-ignorant.org
103bogusmx.rfc-ignorant.org
78rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
78rhsbl.sorbs.net (union of all results)
75dsn.rfc-ignorant.org (zone not intended for this use)
23dob.sibl.support-intelligence.net
13porn.rhs.mailpolice.com
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
128892(total number of domains tested, including 409 at SDSC)
25992(union of all domain zones)
14479whois.rfc-ignorant.org (union of all results)
13848whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4637bogusmx.rfc-ignorant.org
4110abuse.rfc-ignorant.org
2102postmaster.rfc-ignorant.org
1354multi.surbl.org
1127webmail.rhs.mailpolice.com
1028multi.uribl.com (union of all results)
987multi.uribl.com (result 127.0.0.2 = spam resource)
831dsn.rfc-ignorant.org
631whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
458porn.rhs.mailpolice.com
323adv.rhs.mailpolice.com
121bulk.rhs.mailpolice.com
62rddn.dnsbl.net.au (zone not intended for this use)
52dynamic.rhs.mailpolice.com
40multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
33rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
33rhsbl.sorbs.net (union of all results)
30dob.sibl.support-intelligence.net
13ex.dnsbl.org
2fraud.rhs.mailpolice.com
2bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 2 October 2008.