Blacklists Compared

24 April 2010

[ 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, iadb2.isipp.com, and wl.mailspike.net 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
207220(total number of IP addresses tested, including 190 at SDSC)
203872(union of most IP zones)
193970b.barracudacentral.org
190954zen.spamhaus.org (union of all results)
156743cbl.abuseat.org
156724zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
141180dnsbl-2.uceprotect.net
138742dnsbl-1.uceprotect.net
137271psbl.surriel.com
137071dnsbl-3.uceprotect.net
135740bl.mailspike.net (union of all results)
133154hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
125931dnsbl.sorbs.net (union of all results)
115412l2.apews.org
113022zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
90422dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
83902hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
73392bl.spameatingmonkey.net
69934spam.dnsbl.sorbs.net
55276blackholes.five-ten-sg.com (union of all results)
54855bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
50553dnsbl.sorbs.net (result 127.0.0.10 = dialup)
49570blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
47539bl.tiopan.com
44974bl.spamcop.net
42297bl.mailspike.net (result 127.0.0.12 = bad reputation)
39647db.wpbl.info
38366no-more-funn.moensted.dk (union of all results)
38323bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
37275zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
35216bl.mailspike.net (result 127.0.0.11 = very bad reputation)
30575no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
29887ix.dnsbl.manitu.net
29866bl.score.senderscore.com
19985ubl.unsubscore.com
18930mail-abuse.blacklist.jippg.org
12899dnsbl.inps.de
9428hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
7069korea.services.net
6850no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
6530bl.spamcannibal.org
4941dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4579dnsbl.ahbl.org (union of all results)
4445dnsbl.ahbl.org (result 127.0.0.4 = spam source)
4374list.dnswl.org (not a blacklist!)
4363blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4342spamsources.fabel.dk
2930hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2773ips.backscatterer.org
2598tr.countries.nerd.dk
2039dnsbl.njabl.org (union of all results)
1953hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1778dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1315hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1312blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
965wl.mailspike.net (union of all results) (not a blacklist!)
843wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
498accredit.habeas.com (not a blacklist!)
478no-more-funn.moensted.dk (result 127.0.0.9 = misc)
471zen.spamhaus.org (union of SBL and SBLCSS results)
454no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
437zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
425aspews.ext.sorbs.net
413query.bondedsender.org (not a blacklist!)
178dnsbl.njabl.org (result 127.0.0.2 = open relay)
152iadb2.isipp.com (not a blacklist!)
148l2.bbfh.ext.sorbs.net
146tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
146tor.dnsbl.sectoor.de (union of all results)
134dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
122wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
116iadb.isipp.com (not a blacklist!)
97no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
86l1.bbfh.ext.sorbs.net
83dnsbl.njabl.org (result 127.0.0.4 = spam source)
75hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
37bl.deadbeef.com
36dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
35dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
34zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
28blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
24multi.uribl.com (union of all results)
23multi.uribl.com (result 127.0.0.2 = spam resource)
18multi.surbl.org
14dnsbl-0.uceprotect.net
13zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
12hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7spamguard.leadmon.net (union of all results)
4spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3spamguard.leadmon.net (result 127.0.0.8 = open proxy)
3blackholes.brainerd.net
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
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)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)

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
207220(total number of IP addresses whose names were tested, including 190 at SDSC)
132006hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
121738hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
113489(union of most domain zones)
90307abuse.rfc-ignorant.org
62493l1.apews.org
39899whois.rfc-ignorant.org (union of all results)
35540dynamic.rhs.mailpolice.com
29703whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
13630hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
10196whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5115webmail.rhs.mailpolice.com
3239hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1891hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
947adv.rhs.mailpolice.com
472hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
349urired.spameatingmonkey.net
300hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
237hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
196dbl.spamhaus.org
137hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
130hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
79multi.uribl.com (result 127.0.0.2 = spam resource)
79multi.uribl.com (union of all results)
67multi.surbl.org
62postmaster.rfc-ignorant.org
59bulk.rhs.mailpolice.com
45rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
45rhsbl.sorbs.net (union of all results)
42dsn.rfc-ignorant.org (zone not intended for this use)
37rhsbl.ahbl.org
30bogusmx.rfc-ignorant.org
15porn.rhs.mailpolice.com
9fresh.spameatingmonkey.net
7dob.sibl.support-intelligence.net
2bl.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
61077(total number of domains tested, including 168 at SDSC)
58646hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
13318(union of most domain zones)
7318hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
5818whois.rfc-ignorant.org (union of all results)
5555whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3805hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3297abuse.rfc-ignorant.org
2325urired.spameatingmonkey.net
2294hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1991postmaster.rfc-ignorant.org
1214l1.apews.org
1185bogusmx.rfc-ignorant.org
740hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
671webmail.rhs.mailpolice.com
580multi.surbl.org
567dbl.spamhaus.org
520hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
480multi.uribl.com (union of all results)
468multi.uribl.com (result 127.0.0.2 = spam resource)
398dsn.rfc-ignorant.org
270adv.rhs.mailpolice.com
263whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
143porn.rhs.mailpolice.com
65bulk.rhs.mailpolice.com
29hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
29hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
24rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
24rhsbl.sorbs.net (union of all results)
21hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
19rhsbl.ahbl.org
17dynamic.rhs.mailpolice.com
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10ex.dnsbl.org
6hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2fresh.spameatingmonkey.net
1bl.deadbeef.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 30 April 2010.