Blacklists Compared

2 August 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
183739(total number of IP addresses tested, including 521 at SDSC)
175238(union of most IP zones)
151270zen.spamhaus.org (union of all results)
145673l2.apews.org
135753t1.dnsbl.net.au
107891cbl.abuseat.org
107781zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
94700zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
93883dnsbl-3.uceprotect.net
87882dnsbl-2.uceprotect.net
85523psbl.surriel.com
81171dnsbl-1.uceprotect.net
72738dnsbl.sorbs.net (union of all results)
68068hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
55091no-more-funn.moensted.dk (union of all results)
54986dnsbl.sorbs.net (result 127.0.0.10 = dialup)
50981blackholes.five-ten-sg.com (union of all results)
46592blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
45627ubl.unsubscore.com
41902no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
34216bl.spamcop.net
29354ix.dnsbl.manitu.net
25912db.wpbl.info
25605zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
17566dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
13142sbl.csma.biz
12894spam.dnsbl.sorbs.net
12643no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
11784bl.csma.biz
11531bl.spamcannibal.org
10454countries.blackholes.us (result 127.1.5.6 = China)
9588countries.blackholes.us (result 127.0.7.6 = Brazil)
9570tr.countries.nerd.dk
7897hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
7635countries.blackholes.us (result 127.6.4.3 = Russia)
7428mail-abuse.blacklist.jippg.org
7344ips.backscatterer.org
7204dnsbl.inps.de
7203countries.blackholes.us (result 127.7.9.2 = Turkey)
4936spamsources.fabel.dk
4592list.dnswl.org (not a blacklist!)
4510countries.blackholes.us (result 127.0.3.2 = Argentina)
4275dnsbl.njabl.org (union of all results)
4042korea.services.net
3704dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3352countries.blackholes.us (result 127.4.1.0 = Korea)
3347rmst.dnsbl.net.au
3295blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2873hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2804countries.blackholes.us (result 127.7.6.4 = Thailand)
2352dnsbl.ahbl.org (union of all results)
2090dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2082countries.blackholes.us (result 127.3.9.2 = Japan)
1784countries.blackholes.us (result 127.4.8.4 = Mexico)
1029blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
956aspews.ext.sorbs.net
926countries.blackholes.us (result 127.1.5.8 = Taiwan)
815zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
477countries.blackholes.us (result 127.3.4.4 = Hong Kong)
470zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
391countries.blackholes.us (result 127.7.0.2 = Singapore)
374dnsbl.njabl.org (result 127.0.0.4 = spam source)
311probes.dnsbl.net.au
302countries.blackholes.us (result 127.4.5.8 = Malaysia)
300hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
295no-more-funn.moensted.dk (result 127.0.0.9 = misc)
277query.bondedsender.org (not a blacklist!)
253work.drbl.croco.net
218no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
213dnsbl.sorbs.net (result 127.0.0.6 = spam source)
197dnsbl.njabl.org (result 127.0.0.2 = open relay)
194accredit.habeas.com (not a blacklist!)
186dnsbl.ahbl.org (result 127.0.0.4 = spam source)
181iadb2.isipp.com (not a blacklist!)
172bl.deadbeef.com
165iadb.isipp.com (not a blacklist!)
136tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
136tor.dnsbl.sectoor.de (union of all results)
104no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
99dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
98dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
91multi.surbl.org
40blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
39exemptions.ahbl.org (not a blacklist!)
33dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
24dnsbl.ahbl.org (result 127.0.0.15 = open relay)
22countries.blackholes.us (result 127.5.6.6 = Nigeria)
21rdts.dnsbl.net.au
19blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
17dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
14ricn.dnsbl.net.au
12spamguard.leadmon.net (union of all results)
10spam.wytnij.to
9dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
9spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
8dnsbl.sorbs.net (result 127.0.0.5 = open relay)
5blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
3ohps.dnsbl.net.au
3blackholes.brainerd.net
2multi.uribl.com (result 127.0.0.2 = spam resource)
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
2multi.uribl.com (union of all results)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
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
1dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses.

HitsDNS Zone
183739(total number of IP addresses whose names were tested, including 521 at SDSC)
106378(union of all domain zones)
84661l1.apews.org
75700abuse.rfc-ignorant.org
58566rddn.dnsbl.net.au
42323whois.rfc-ignorant.org (union of all results)
38049dynamic.rhs.mailpolice.com
29633whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
12691whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
7403webmail.rhs.mailpolice.com
567adv.rhs.mailpolice.com
482bl.deadbeef.com
314multi.surbl.org
300multi.uribl.com (union of all results)
299multi.uribl.com (result 127.0.0.2 = spam resource)
227bulk.rhs.mailpolice.com
87rhsbl.ahbl.org
82postmaster.rfc-ignorant.org
64bogusmx.rfc-ignorant.org
58dsn.rfc-ignorant.org (zone not intended for this use)
44rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
44rhsbl.sorbs.net (union of all results)
14porn.rhs.mailpolice.com
14dob.sibl.support-intelligence.net
1multi.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
128085(total number of domains tested, including 479 at SDSC)
25995(union of all domain zones)
12410whois.rfc-ignorant.org (union of all results)
11715whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5268bogusmx.rfc-ignorant.org
4557abuse.rfc-ignorant.org
2637postmaster.rfc-ignorant.org
1788multi.surbl.org
1571multi.uribl.com (union of all results)
1515multi.uribl.com (result 127.0.0.2 = spam resource)
1482l1.apews.org
1173webmail.rhs.mailpolice.com
902dsn.rfc-ignorant.org
695whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
481porn.rhs.mailpolice.com
289adv.rhs.mailpolice.com
187rhsbl.ahbl.org
176bulk.rhs.mailpolice.com
134rddn.dnsbl.net.au (zone not intended for this use)
119dynamic.rhs.mailpolice.com
55multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
52rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
52rhsbl.sorbs.net (union of all results)
38dob.sibl.support-intelligence.net
16ex.dnsbl.org
5fraud.rhs.mailpolice.com
3bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1cart00ney.surriel.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 8 August 2008.