Blacklists Compared

21 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
152181(total number of IP addresses tested, including 492 at SDSC)
144483(union of most IP zones)
123656l2.apews.org
122184zen.spamhaus.org (union of all results)
108491t1.dnsbl.net.au
81040cbl.abuseat.org
80950zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
77403zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
76925dnsbl-3.uceprotect.net
71031dnsbl-2.uceprotect.net
70676dnsbl-1.uceprotect.net
61668hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
58067psbl.surriel.com
56956dnsbl.sorbs.net (union of all results)
48919dnsbl.sorbs.net (result 127.0.0.10 = dialup)
48331no-more-funn.moensted.dk (union of all results)
46416blackholes.five-ten-sg.com (union of all results)
41284blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
37647no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
36291ubl.unsubscore.com
31258ix.dnsbl.manitu.net
27391bl.spamcop.net
24806db.wpbl.info
23958zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
23404sbl.csma.biz
11568bl.csma.biz
11509spam.dnsbl.sorbs.net
9941no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
9578bl.spamcannibal.org
8509countries.blackholes.us (result 127.6.4.3 = Russia)
7693dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
7666hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
7609countries.blackholes.us (result 127.1.5.6 = China)
7541tr.countries.nerd.dk
7384mail-abuse.blacklist.jippg.org
7359ips.backscatterer.org
6356countries.blackholes.us (result 127.0.7.6 = Brazil)
6240dnsbl.inps.de
5812countries.blackholes.us (result 127.7.9.2 = Turkey)
4314rmst.dnsbl.net.au
4244list.dnswl.org (not a blacklist!)
3925blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
3636korea.services.net
3177dnsbl.njabl.org (union of all results)
3081countries.blackholes.us (result 127.0.3.2 = Argentina)
3066countries.blackholes.us (result 127.4.1.0 = Korea)
2669dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2664spamsources.fabel.dk
2344hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2006countries.blackholes.us (result 127.7.6.4 = Thailand)
1847dnsbl.ahbl.org (union of all results)
1667dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1426countries.blackholes.us (result 127.4.8.4 = Mexico)
1337countries.blackholes.us (result 127.3.9.2 = Japan)
1155blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
911aspews.ext.sorbs.net
801zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
646countries.blackholes.us (result 127.1.5.8 = Taiwan)
574no-more-funn.moensted.dk (result 127.0.0.9 = misc)
566zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
463dnsbl.sorbs.net (result 127.0.0.6 = spam source)
462dnsbl.njabl.org (result 127.0.0.4 = spam source)
445hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
328countries.blackholes.us (result 127.3.4.4 = Hong Kong)
318countries.blackholes.us (result 127.7.0.2 = Singapore)
296probes.dnsbl.net.au
286countries.blackholes.us (result 127.4.5.8 = Malaysia)
285query.bondedsender.org (not a blacklist!)
200work.drbl.croco.net
184accredit.habeas.com (not a blacklist!)
178tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
178tor.dnsbl.sectoor.de (union of all results)
159no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
158bl.deadbeef.com
157iadb2.isipp.com (not a blacklist!)
140iadb.isipp.com (not a blacklist!)
116dnsbl.ahbl.org (result 127.0.0.4 = spam source)
104dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
103dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
96multi.surbl.org
90no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
46dnsbl.njabl.org (result 127.0.0.2 = open relay)
39exemptions.ahbl.org (not a blacklist!)
30dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
29blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
20rdts.dnsbl.net.au
19dnsbl.ahbl.org (result 127.0.0.15 = open relay)
18blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
15countries.blackholes.us (result 127.5.6.6 = Nigeria)
15dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
12dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
10spam.wytnij.to
10blackholes.brainerd.net
9spamguard.leadmon.net (union of all results)
8multi.uribl.com (result 127.0.0.2 = spam resource)
8multi.uribl.com (union of all results)
7spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
4dnsbl.sorbs.net (result 127.0.0.5 = open relay)
4blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
4dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
3ohps.dnsbl.net.au
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1osps.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
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 127.0.0.10 = 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
152181(total number of IP addresses whose names were tested, including 492 at SDSC)
90245(union of all domain zones)
73181l1.apews.org
62524abuse.rfc-ignorant.org
51455rddn.dnsbl.net.au
32577dynamic.rhs.mailpolice.com
32024whois.rfc-ignorant.org (union of all results)
22292whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
9733whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
6196webmail.rhs.mailpolice.com
576adv.rhs.mailpolice.com
449multi.surbl.org
362multi.uribl.com (union of all results)
360multi.uribl.com (result 127.0.0.2 = spam resource)
279bl.deadbeef.com
130bogusmx.rfc-ignorant.org
93rhsbl.ahbl.org
79postmaster.rfc-ignorant.org
58dsn.rfc-ignorant.org (zone not intended for this use)
56bulk.rhs.mailpolice.com
53dob.sibl.support-intelligence.net
18rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
18rhsbl.sorbs.net (union of all results)
12porn.rhs.mailpolice.com
2multi.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
141801(total number of domains tested, including 444 at SDSC)
30836(union of all domain zones)
16002whois.rfc-ignorant.org (union of all results)
15339whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6544bogusmx.rfc-ignorant.org
4438abuse.rfc-ignorant.org
2609postmaster.rfc-ignorant.org
1963multi.surbl.org
1665multi.uribl.com (union of all results)
1598multi.uribl.com (result 127.0.0.2 = spam resource)
1551l1.apews.org
1139webmail.rhs.mailpolice.com
953dsn.rfc-ignorant.org
663whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
521porn.rhs.mailpolice.com
277adv.rhs.mailpolice.com
178rhsbl.ahbl.org
171bulk.rhs.mailpolice.com
116rddn.dnsbl.net.au (zone not intended for this use)
104dynamic.rhs.mailpolice.com
77dob.sibl.support-intelligence.net
64multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
36rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
36rhsbl.sorbs.net (union of all results)
13ex.dnsbl.org
4bl.deadbeef.com
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2fraud.rhs.mailpolice.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 27 June 2008.