Blacklists Compared

12 September 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 (all results but 127.0.0.2, 127.0.0.3, and 127.0.0.4), 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
143233(total number of IP addresses tested, including 243 at SDSC)
139343(union of most IP zones)
128151b.barracudacentral.org
124087zen.spamhaus.org (union of all results)
118902l2.apews.org
105602bl.spameatingmonkey.net
90131hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
85327cbl.abuseat.org
85237zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
84174dnsbl.sorbs.net (union of all results)
84023dnsbl-1.uceprotect.net
82415dnsbl-2.uceprotect.net
80906dnsbl-3.uceprotect.net
79306zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
76369psbl.surriel.com
62658dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
60695ubl.unsubscore.com
42990hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
33807no-more-funn.moensted.dk (union of all results)
32248dnsbl.sorbs.net (result 127.0.0.10 = dialup)
30145bl.spamcop.net
25591db.wpbl.info
23027blackholes.five-ten-sg.com (union of all results)
22798no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
22094zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
20569blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
15339spam.dnsbl.sorbs.net
14921ix.dnsbl.manitu.net
11252mail-abuse.blacklist.jippg.org
8949no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
8858dnsbl.inps.de
7999hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
7439korea.services.net
6872bl.spamcannibal.org
5124ips.backscatterer.org
4098spamsources.fabel.dk
3917list.dnswl.org (not a blacklist!)
3802tr.countries.nerd.dk
3103hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2210dnsbl.njabl.org (union of all results)
2173hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1878blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
1782hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1605dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1106no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
894no-more-funn.moensted.dk (result 127.0.0.9 = misc)
778aspews.ext.sorbs.net
568blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
529accredit.habeas.com (not a blacklist!)
470dnsbl.njabl.org (result 127.0.0.4 = spam source)
411query.bondedsender.org (not a blacklist!)
337dnsbl.sorbs.net (result 127.0.0.6 = spam source)
264zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
203l2.bbfh.ext.sorbs.net
177dnsbl.ahbl.org (union of all results)
167iadb2.isipp.com (not a blacklist!)
135dnsbl.njabl.org (result 127.0.0.2 = open relay)
129dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
122no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
120iadb.isipp.com (not a blacklist!)
104tor.dnsbl.sectoor.de (union of all results)
102tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
74hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
54bl.deadbeef.com
51l1.bbfh.ext.sorbs.net
48dnsbl.ahbl.org (result 127.0.0.4 = spam source)
30dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
25dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
12multi.uribl.com (union of all results)
11multi.uribl.com (result 127.0.0.2 = spam resource)
11blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
8zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
5dnsbl-0.uceprotect.net
5dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
5spamguard.leadmon.net (union of all results)
4dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
4spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3multi.surbl.org
3hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2blackholes.brainerd.net
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
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. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
143233(total number of IP addresses whose names were tested, including 243 at SDSC)
85448hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
76318hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
68662(union of most domain zones)
59515l1.apews.org
54595abuse.rfc-ignorant.org
26716dynamic.rhs.mailpolice.com
23257whois.rfc-ignorant.org (union of all results)
15363whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
8414hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
7895whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3668webmail.rhs.mailpolice.com
3344hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1281urired.spameatingmonkey.net
763adv.rhs.mailpolice.com
729hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
637hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
255hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
193hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
159hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
118rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
118rhsbl.sorbs.net (union of all results)
85multi.uribl.com (result 127.0.0.2 = spam resource)
85multi.uribl.com (union of all results)
73postmaster.rfc-ignorant.org
60multi.surbl.org
46dsn.rfc-ignorant.org (zone not intended for this use)
42bogusmx.rfc-ignorant.org
30fresh.spameatingmonkey.net
30bulk.rhs.mailpolice.com
30dob.sibl.support-intelligence.net
30rhsbl.ahbl.org
25hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
6porn.rhs.mailpolice.com
1fraud.rhs.mailpolice.com
1bl.deadbeef.com


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
74369(total number of domains tested, including 221 at SDSC)
69458hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
18995(union of most domain zones)
7775urired.spameatingmonkey.net
7161hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4705whois.rfc-ignorant.org (union of all results)
4635hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4129whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3850abuse.rfc-ignorant.org
2465hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2451l1.apews.org
1796hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1526bogusmx.rfc-ignorant.org
1312multi.surbl.org
1204multi.uribl.com (union of all results)
1193multi.uribl.com (result 127.0.0.2 = spam resource)
1167postmaster.rfc-ignorant.org
924webmail.rhs.mailpolice.com
801hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
576whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
552hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
397dsn.rfc-ignorant.org
346dynamic.rhs.mailpolice.com
313porn.rhs.mailpolice.com
298adv.rhs.mailpolice.com
103bulk.rhs.mailpolice.com
36hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
31hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
30hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
24fresh.spameatingmonkey.net
23rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
23rhsbl.sorbs.net (union of all results)
17rhsbl.ahbl.org
16ex.dnsbl.org
11dob.sibl.support-intelligence.net
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
3fraud.rhs.mailpolice.com
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1bl.deadbeef.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 17 September 2009.