Blacklists Compared

26 January 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
242538(total number of IP addresses tested, including 470 at SDSC)
234932(union of most IP zones)
213812zen.spamhaus.org (union of all results)
212070l2.apews.org
199711t1.dnsbl.net.au
167256pbl.spamhaus.org (union of all results)
163542sbl-xbl.spamhaus.org (union of all results)
162984xbl.spamhaus.org (union of all results)
162823sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
162814cbl.abuseat.org
162762zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
162747xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
137853dnsbl-3.uceprotect.net
135309dnsbl-2.uceprotect.net
127928zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
127821pbl.spamhaus.org (result 127.0.0.11 = Spamhaus entry)
126012dnsbl-1.uceprotect.net
116454psbl.surriel.com
114042dnsbl.sorbs.net (union of all results)
98816ubl.unsubscore.com
95919dnsbl.sorbs.net (result 127.0.0.10 = dialup)
94816no-more-funn.moensted.dk (union of all results)
87179hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
85611blackholes.five-ten-sg.com (union of all results)
81744no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
79522blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
52319bl.spamcop.net
39454zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
39454pbl.spamhaus.org (result 127.0.0.10 = ISP contributed)
36287ix.dnsbl.manitu.net
28327db.wpbl.info
18720dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
16018unconfirmed.dsbl.org
15911dsbl.dnsbl.net.au
15911list.dsbl.org
15382tr.countries.nerd.dk
15257bl.spamcannibal.org
15009sbl.csma.biz
14757bl.csma.biz
13240countries.blackholes.us (result 127.7.9.2 = Turkey)
13127mail-abuse.blacklist.jippg.org
11809no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
8653countries.blackholes.us (result 127.0.7.6 = Brazil)
7824countries.blackholes.us (result 127.6.4.3 = Russia)
6989rmst.dnsbl.net.au
6701korea.services.net
6338countries.blackholes.us (result 127.1.5.6 = China)
6103countries.blackholes.us (result 127.4.1.0 = Korea)
4989dnsbl.njabl.org (union of all results)
4971blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4791dnsbl.njabl.org (result 127.0.0.9 = open proxy)
4332ips.backscatterer.org
4240list.dnswl.org (not a blacklist!)
3946countries.blackholes.us (result 127.0.3.2 = Argentina)
3112countries.blackholes.us (result 127.7.6.4 = Thailand)
3059countries.blackholes.us (result 127.4.8.4 = Mexico)
3032dnsbl.ahbl.org (union of all results)
2832dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2769spamsources.fabel.dk
1966hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1569aspews.ext.sorbs.net
1265countries.blackholes.us (result 127.3.9.2 = Japan)
1054blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1048sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1047zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1046xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1008countries.blackholes.us (result 127.4.5.8 = Malaysia)
924countries.blackholes.us (result 127.1.5.8 = Taiwan)
910probes.dnsbl.net.au
907no-more-funn.moensted.dk (result 127.0.0.9 = misc)
757hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
609zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
609sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
609sbl.spamhaus.org
477countries.blackholes.us (result 127.3.4.4 = Hong Kong)
459bl.deadbeef.com
454countries.blackholes.us (result 127.7.0.2 = Singapore)
275dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
275dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
257no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
257work.drbl.croco.net
194multi.surbl.org
189no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
173query.bondedsender.org (not a blacklist!)
170accredit.habeas.com (not a blacklist!)
144iadb2.isipp.com (not a blacklist!)
138dnsbl.ahbl.org (result 127.0.0.4 = spam source)
137iadb.isipp.com (not a blacklist!)
109dnsbl.sorbs.net (result 127.0.0.6 = spam source)
104dnsbl.njabl.org (result 127.0.0.2 = open relay)
94dnsbl.njabl.org (result 127.0.0.4 = spam source)
92hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
85multihop.dsbl.org
80multi.uribl.com (result 127.0.0.2 = spam resource)
80dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
80multi.uribl.com (union of all results)
48relays.nether.net
41countries.blackholes.us (result 127.5.6.6 = Nigeria)
41rdts.dnsbl.net.au
33blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
32dnsbl.ahbl.org (result 127.0.0.15 = open relay)
29exemptions.ahbl.org (not a blacklist!)
28blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
21spam.wytnij.to
21spamguard.leadmon.net (union of all results)
12dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
11spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
11blackholes.brainerd.net
11dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
9spamguard.leadmon.net (result 127.0.0.8 = open proxy)
6ohps.dnsbl.net.au
4osrs.dnsbl.net.au
4dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
2owps.dnsbl.net.au
2blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1osps.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1dob.sibl.support-intelligence.net
1dnsbl.ahbl.org (result 127.0.0.11 = no postmaster or abuse e-mail)
1dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
1dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)


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

HitsDNS Zone
242538(total number of IP addresses whose names were tested, including 470 at SDSC)
158111(union of all domain zones)
138617l1.apews.org
102373rddn.dnsbl.net.au
101432abuse.rfc-ignorant.org
61538dynamic.rhs.mailpolice.com
61100whois.rfc-ignorant.org (union of all results)
39514whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
21587whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
10635webmail.rhs.mailpolice.com
781multi.surbl.org
691multi.uribl.com (union of all results)
689multi.uribl.com (result 127.0.0.2 = spam resource)
592adv.rhs.mailpolice.com
146bl.deadbeef.com
98postmaster.rfc-ignorant.org
85bogusmx.rfc-ignorant.org
84rhsbl.ahbl.org
76dsn.rfc-ignorant.org (zone not intended for this use)
67bulk.rhs.mailpolice.com
43dob.sibl.support-intelligence.net
33rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
33rhsbl.sorbs.net (union of all results)
5porn.rhs.mailpolice.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
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
166887(total number of domains tested, including 415 at SDSC)
39886(union of all domain zones)
22735whois.rfc-ignorant.org (union of all results)
22037whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6634bogusmx.rfc-ignorant.org
4904abuse.rfc-ignorant.org
2655multi.surbl.org
2200multi.uribl.com (union of all results)
2142multi.uribl.com (result 127.0.0.2 = spam resource)
1915l1.apews.org
1892postmaster.rfc-ignorant.org
1744dob.sibl.support-intelligence.net
1351webmail.rhs.mailpolice.com
995dsn.rfc-ignorant.org
727porn.rhs.mailpolice.com
698whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
304rhsbl.ahbl.org
283bulk.rhs.mailpolice.com
237adv.rhs.mailpolice.com
182blackhole.securitysage.com
124rddn.dnsbl.net.au (zone not intended for this use)
99dynamic.rhs.mailpolice.com
71rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
71rhsbl.sorbs.net (union of all results)
53multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
12ex.dnsbl.org
5multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
4fraud.rhs.mailpolice.com
4bl.deadbeef.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 1 February 2008.