Blacklists Compared

7 March 2009

[ 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 and 127.0.0.5 results), 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
65355(total number of IP addresses tested, including 208 at SDSC)
61884(union of most IP zones)
51120zen.spamhaus.org (union of all results)
48293l2.apews.org
45797t1.dnsbl.net.au
42188b.barracudacentral.org
39778cbl.abuseat.org
39723zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
31580zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
29450dnsbl-3.uceprotect.net
29256dnsbl-1.uceprotect.net
26333dnsbl-2.uceprotect.net
25991hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
23118ubl.unsubscore.com
22562dnsbl.sorbs.net (union of all results)
19944psbl.surriel.com
19880blackholes.five-ten-sg.com (union of all results)
17244no-more-funn.moensted.dk (union of all results)
16656blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
14567dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10564no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
10463bl.spamcop.net
9287db.wpbl.info
8590zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
7924dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
7346spam.dnsbl.sorbs.net
6673ix.dnsbl.manitu.net
5937no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
4616countries.blackholes.us (result 127.1.5.6 = China)
4017dnsbl.inps.de
3910bl.spamcannibal.org
3781list.dnswl.org (not a blacklist!)
3490tr.countries.nerd.dk
3173ips.backscatterer.org
2847spamsources.fabel.dk
2696korea.services.net
2642hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2380countries.blackholes.us (result 127.0.7.6 = Brazil)
2281countries.blackholes.us (result 127.7.9.2 = Turkey)
2144mail-abuse.blacklist.jippg.org
2057blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
1945countries.blackholes.us (result 127.4.1.0 = Korea)
1875countries.blackholes.us (result 127.6.4.3 = Russia)
1806hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1519hostkarma.junkemailfilter.com (result 127.0.0.5 = do not reject)
1254countries.blackholes.us (result 127.7.6.4 = Thailand)
1198dnsbl.njabl.org (union of all results)
1124blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
992dnsbl.njabl.org (result 127.0.0.9 = open proxy)
945rmst.dnsbl.net.au
652aspews.ext.sorbs.net
649countries.blackholes.us (result 127.0.3.2 = Argentina)
570countries.blackholes.us (result 127.1.5.8 = Taiwan)
504no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
461zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
427countries.blackholes.us (result 127.4.8.4 = Mexico)
413countries.blackholes.us (result 127.3.9.2 = Japan)
362query.bondedsender.org (not a blacklist!)
226dnsbl.sorbs.net (result 127.0.0.6 = spam source)
215countries.blackholes.us (result 127.3.4.4 = Hong Kong)
207no-more-funn.moensted.dk (result 127.0.0.9 = misc)
192accredit.habeas.com (not a blacklist!)
177dnsbl.njabl.org (result 127.0.0.4 = spam source)
172iadb2.isipp.com (not a blacklist!)
132iadb.isipp.com (not a blacklist!)
111hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
103countries.blackholes.us (result 127.7.0.2 = Singapore)
88spamguard.leadmon.net (union of all results)
86spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
82no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
75dnsbl.ahbl.org (union of all results)
58zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
58countries.blackholes.us (result 127.4.5.8 = Malaysia)
49bl.deadbeef.com
46l2.bbfh.ext.sorbs.net
41tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
41dnsbl.ahbl.org (result 127.0.0.4 = spam source)
41tor.dnsbl.sectoor.de (union of all results)
34dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
32probes.dnsbl.net.au
29dnsbl.njabl.org (result 127.0.0.2 = open relay)
26blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
18dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
17dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
17blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
15dnsbl-0.uceprotect.net
5multi.surbl.org
4countries.blackholes.us (result 127.5.6.6 = Nigeria)
4multi.uribl.com (result 127.0.0.2 = spam resource)
4dnsbl.sorbs.net (result 127.0.0.5 = open relay)
4multi.uribl.com (union of all results)
3dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
1ricn.dnsbl.net.au
1rdts.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
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
65355(total number of IP addresses whose names were tested, including 208 at SDSC)
33302(union of all domain zones)
24471l1.apews.org
22899abuse.rfc-ignorant.org
16856rddn.dnsbl.net.au
11060dynamic.rhs.mailpolice.com
11003whois.rfc-ignorant.org (union of all results)
6778whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4225whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
2311webmail.rhs.mailpolice.com
662adv.rhs.mailpolice.com
488rhsbl.ahbl.org
179multi.surbl.org
117multi.uribl.com (union of all results)
116multi.uribl.com (result 127.0.0.2 = spam resource)
60postmaster.rfc-ignorant.org
56bogusmx.rfc-ignorant.org
45dsn.rfc-ignorant.org (zone not intended for this use)
29bulk.rhs.mailpolice.com
11bl.deadbeef.com
8rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
8dob.sibl.support-intelligence.net
8rhsbl.sorbs.net (union of all results)
5porn.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
43847(total number of domains tested, including 167 at SDSC)
11860(union of all domain zones)
4750whois.rfc-ignorant.org (union of all results)
4331whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2693abuse.rfc-ignorant.org
2319bogusmx.rfc-ignorant.org
1933postmaster.rfc-ignorant.org
1416l1.apews.org
864webmail.rhs.mailpolice.com
803multi.surbl.org
749multi.uribl.com (union of all results)
727multi.uribl.com (result 127.0.0.2 = spam resource)
449dsn.rfc-ignorant.org
419whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
257adv.rhs.mailpolice.com
178bulk.rhs.mailpolice.com
144porn.rhs.mailpolice.com
115rhsbl.ahbl.org
54dob.sibl.support-intelligence.net
36rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
36rhsbl.sorbs.net (union of all results)
28rddn.dnsbl.net.au (zone not intended for this use)
22multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
15dynamic.rhs.mailpolice.com
14ex.dnsbl.org
4fraud.rhs.mailpolice.com
1bl.deadbeef.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 12 March 2009.