Blacklists Compared

1 August 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
163294(total number of IP addresses tested, including 193 at SDSC)
159982(union of most IP zones)
147580b.barracudacentral.org
145259zen.spamhaus.org (union of all results)
140998l2.apews.org
110212hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
103526cbl.abuseat.org
103443zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
100750dnsbl.sorbs.net (union of all results)
99462dnsbl-2.uceprotect.net
98794dnsbl-1.uceprotect.net
98744dnsbl-3.uceprotect.net
91708zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
75073dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
58216ubl.unsubscore.com
50280psbl.surriel.com
48405hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
40939no-more-funn.moensted.dk (union of all results)
39629blackholes.five-ten-sg.com (union of all results)
39518dnsbl.sorbs.net (result 127.0.0.10 = dialup)
38937bl.spameatingmonkey.net
35469blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
33870bl.spamcop.net
27760no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
27166db.wpbl.info
25996zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
18151ix.dnsbl.manitu.net
15940spam.dnsbl.sorbs.net
13493mail-abuse.blacklist.jippg.org
12064hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
11443no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
10910dnsbl.inps.de
9554korea.services.net
8185bl.spamcannibal.org
6324tr.countries.nerd.dk
5210spamsources.fabel.dk
3731ips.backscatterer.org
3612list.dnswl.org (not a blacklist!)
3133hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3064blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2530dnsbl.njabl.org (union of all results)
2084dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1785hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1180hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
1121hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1072blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
970no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
944aspews.ext.sorbs.net
712no-more-funn.moensted.dk (result 127.0.0.9 = misc)
485accredit.habeas.com (not a blacklist!)
452l2.bbfh.ext.sorbs.net
393query.bondedsender.org (not a blacklist!)
301dnsbl.njabl.org (result 127.0.0.4 = spam source)
247dnsbl.sorbs.net (result 127.0.0.6 = spam source)
171l1.bbfh.ext.sorbs.net
168dnsbl.ahbl.org (union of all results)
164iadb2.isipp.com (not a blacklist!)
146dnsbl.njabl.org (result 127.0.0.2 = open relay)
139zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
132dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
128tor.dnsbl.sectoor.de (union of all results)
127tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
123no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
118iadb.isipp.com (not a blacklist!)
70bl.deadbeef.com
43dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
43dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
36dnsbl.ahbl.org (result 127.0.0.4 = spam source)
23blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
22spamguard.leadmon.net (union of all results)
21spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
20zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
11multi.uribl.com (result 127.0.0.2 = spam resource)
11multi.uribl.com (union of all results)
8multi.surbl.org
7dnsbl-0.uceprotect.net
4blackholes.brainerd.net
3dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
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
163294(total number of IP addresses whose names were tested, including 193 at SDSC)
98576hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
89596hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
81127(union of most domain zones)
73277l1.apews.org
65444abuse.rfc-ignorant.org
33290dynamic.rhs.mailpolice.com
26831whois.rfc-ignorant.org (union of all results)
16108whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
10723whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
8561hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4065webmail.rhs.mailpolice.com
3486hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1653urired.spameatingmonkey.net
839rhsbl.ahbl.org
795adv.rhs.mailpolice.com
780hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
355hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
187multi.uribl.com (result 127.0.0.2 = spam resource)
187multi.uribl.com (union of all results)
176hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
170multi.surbl.org
166hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
99rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
99rhsbl.sorbs.net (union of all results)
70postmaster.rfc-ignorant.org
45dsn.rfc-ignorant.org (zone not intended for this use)
43bogusmx.rfc-ignorant.org
27fresh.spameatingmonkey.net
27dob.sibl.support-intelligence.net
25bulk.rhs.mailpolice.com
23hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
13bl.deadbeef.com
3porn.rhs.mailpolice.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
70280(total number of domains tested, including 173 at SDSC)
46413hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
18345hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
15416(union of most domain zones)
8099hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6040whois.rfc-ignorant.org (union of all results)
5240whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4831hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4476abuse.rfc-ignorant.org
2982l1.apews.org
2448urired.spameatingmonkey.net
2400hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1963hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1468bogusmx.rfc-ignorant.org
1397multi.surbl.org
1269postmaster.rfc-ignorant.org
1268multi.uribl.com (union of all results)
1254multi.uribl.com (result 127.0.0.2 = spam resource)
981webmail.rhs.mailpolice.com
800whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
638hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
474dynamic.rhs.mailpolice.com
415dsn.rfc-ignorant.org
295adv.rhs.mailpolice.com
243porn.rhs.mailpolice.com
116rhsbl.ahbl.org
104hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
85bulk.rhs.mailpolice.com
32rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
32rhsbl.sorbs.net (union of all results)
31hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
14ex.dnsbl.org
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10fresh.spameatingmonkey.net
9dob.sibl.support-intelligence.net
3fraud.rhs.mailpolice.com
3bl.deadbeef.com
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 6 August 2009.