Blacklists Compared

14 June 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
159184(total number of IP addresses tested, including 480 at SDSC)
150789(union of most IP zones)
131611l2.apews.org
126916zen.spamhaus.org (union of all results)
109263t1.dnsbl.net.au
80536zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
79175dnsbl-3.uceprotect.net
77283cbl.abuseat.org
77129zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
74181dnsbl-1.uceprotect.net
73648dnsbl-2.uceprotect.net
69374psbl.surriel.com
63391hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
58737dnsbl.sorbs.net (union of all results)
51290dnsbl.sorbs.net (result 127.0.0.10 = dialup)
50584no-more-funn.moensted.dk (union of all results)
48336blackholes.five-ten-sg.com (union of all results)
43530blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
39658no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
35127ubl.unsubscore.com
34650sbl.csma.biz
29450ix.dnsbl.manitu.net
29356bl.spamcop.net
25391db.wpbl.info
24382zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
11583spam.dnsbl.sorbs.net
11290bl.csma.biz
10175no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
10130bl.spamcannibal.org
8817tr.countries.nerd.dk
8054hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
7296countries.blackholes.us (result 127.6.4.3 = Russia)
7129ips.backscatterer.org
7067mail-abuse.blacklist.jippg.org
7056dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6783countries.blackholes.us (result 127.7.9.2 = Turkey)
6688countries.blackholes.us (result 127.0.7.6 = Brazil)
5829dnsbl.inps.de
4419rmst.dnsbl.net.au
4414list.dnswl.org (not a blacklist!)
4153countries.blackholes.us (result 127.1.5.6 = China)
4010korea.services.net
3587blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
3288dnsbl.njabl.org (union of all results)
3272countries.blackholes.us (result 127.0.3.2 = Argentina)
2913dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2531spamsources.fabel.dk
2457hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2422countries.blackholes.us (result 127.4.1.0 = Korea)
2104countries.blackholes.us (result 127.7.6.4 = Thailand)
1958dnsbl.ahbl.org (union of all results)
1801dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1610countries.blackholes.us (result 127.4.8.4 = Mexico)
1167blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1123countries.blackholes.us (result 127.3.9.2 = Japan)
942aspews.ext.sorbs.net
595zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
533no-more-funn.moensted.dk (result 127.0.0.9 = misc)
531hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
516countries.blackholes.us (result 127.1.5.8 = Taiwan)
514dnsbl.sorbs.net (result 127.0.0.6 = spam source)
457zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
345probes.dnsbl.net.au
333dnsbl.njabl.org (result 127.0.0.4 = spam source)
276countries.blackholes.us (result 127.4.5.8 = Malaysia)
272query.bondedsender.org (not a blacklist!)
210tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
210tor.dnsbl.sectoor.de (union of all results)
204countries.blackholes.us (result 127.3.4.4 = Hong Kong)
198countries.blackholes.us (result 127.7.0.2 = Singapore)
191no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
186accredit.habeas.com (not a blacklist!)
179work.drbl.croco.net
165iadb2.isipp.com (not a blacklist!)
154iadb.isipp.com (not a blacklist!)
149bl.deadbeef.com
127dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
126multi.surbl.org
120dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
97no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
88dnsbl.ahbl.org (result 127.0.0.4 = spam source)
42dnsbl.njabl.org (result 127.0.0.2 = open relay)
40exemptions.ahbl.org (not a blacklist!)
27blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
27dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
23blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
22countries.blackholes.us (result 127.5.6.6 = Nigeria)
20dnsbl.ahbl.org (result 127.0.0.15 = open relay)
19dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
17dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
16rdts.dnsbl.net.au
13spam.wytnij.to
12multi.uribl.com (union of all results)
11multi.uribl.com (result 127.0.0.2 = spam resource)
10spamguard.leadmon.net (union of all results)
7spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
5dnsbl.sorbs.net (result 127.0.0.5 = open relay)
4blackholes.brainerd.net
4dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1ohps.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1hil.habeas.com
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1dob.sibl.support-intelligence.net
1dnsbl.ahbl.org (result 127.0.0.11 = no postmaster or abuse e-mail)


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

HitsDNS Zone
159184(total number of IP addresses whose names were tested, including 480 at SDSC)
94423(union of all domain zones)
77424l1.apews.org
65995abuse.rfc-ignorant.org
53751rddn.dnsbl.net.au
34017whois.rfc-ignorant.org (union of all results)
33292dynamic.rhs.mailpolice.com
23188whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
10830whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
6696webmail.rhs.mailpolice.com
597adv.rhs.mailpolice.com
535multi.surbl.org
392multi.uribl.com (result 127.0.0.2 = spam resource)
392multi.uribl.com (union of all results)
265bl.deadbeef.com
100bogusmx.rfc-ignorant.org
95rhsbl.ahbl.org
73postmaster.rfc-ignorant.org
62bulk.rhs.mailpolice.com
54dsn.rfc-ignorant.org (zone not intended for this use)
44dob.sibl.support-intelligence.net
27rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
27rhsbl.sorbs.net (union of all results)
18porn.rhs.mailpolice.com
2ex.dnsbl.org


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains.

HitsDNS Zone
122172(total number of domains tested, including 444 at SDSC)
27261(union of all domain zones)
14288whois.rfc-ignorant.org (union of all results)
13669whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5206bogusmx.rfc-ignorant.org
4433abuse.rfc-ignorant.org
2044postmaster.rfc-ignorant.org
1742multi.surbl.org
1440l1.apews.org
1358multi.uribl.com (union of all results)
1296multi.uribl.com (result 127.0.0.2 = spam resource)
1169webmail.rhs.mailpolice.com
904dsn.rfc-ignorant.org
619whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
394porn.rhs.mailpolice.com
262adv.rhs.mailpolice.com
159rhsbl.ahbl.org
156bulk.rhs.mailpolice.com
109rddn.dnsbl.net.au (zone not intended for this use)
93dynamic.rhs.mailpolice.com
77dob.sibl.support-intelligence.net
62multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
51rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
51rhsbl.sorbs.net (union of all results)
13ex.dnsbl.org
3bl.deadbeef.com
2fraud.rhs.mailpolice.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 20 June 2008.