Blacklists Compared

2 May 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
113527(total number of IP addresses tested, including 212 at SDSC)
109987(union of most IP zones)
94313zen.spamhaus.org (union of all results)
92663b.barracudacentral.org
81990t1.dnsbl.net.au
67613cbl.abuseat.org
67516zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
61960dnsbl-3.uceprotect.net
61869dnsbl-2.uceprotect.net
61314hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
58371dnsbl-1.uceprotect.net
54521zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
50506psbl.surriel.com
49196dnsbl.sorbs.net (union of all results)
45562ubl.unsubscore.com
29507hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
29480no-more-funn.moensted.dk (union of all results)
28079blackholes.five-ten-sg.com (union of all results)
26504dnsbl.sorbs.net (result 127.0.0.10 = dialup)
25588dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
24960blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
22644bl.spamcop.net
21441zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
20960db.wpbl.info
20734no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
19077l2.apews.org
13138ix.dnsbl.manitu.net
11404spam.dnsbl.sorbs.net
10102tr.countries.nerd.dk
10034hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8284mail-abuse.blacklist.jippg.org
7891no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
7685ips.backscatterer.org
6746dnsbl.inps.de
6303bl.spamcannibal.org
5419korea.services.net
4139list.dnswl.org (not a blacklist!)
3660hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3375hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2828spamsources.fabel.dk
2050blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
1866hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1777dnsbl.njabl.org (union of all results)
1446dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1347rmst.dnsbl.net.au
1046blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
870aspews.ext.sorbs.net
491no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
480hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
400query.bondedsender.org (not a blacklist!)
348dnsbl.sorbs.net (result 127.0.0.6 = spam source)
346zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
306no-more-funn.moensted.dk (result 127.0.0.9 = misc)
212dnsbl.njabl.org (result 127.0.0.4 = spam source)
194accredit.habeas.com (not a blacklist!)
168iadb2.isipp.com (not a blacklist!)
127iadb.isipp.com (not a blacklist!)
119dnsbl.njabl.org (result 127.0.0.2 = open relay)
119spamguard.leadmon.net (union of all results)
117spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
111no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
69tor.dnsbl.sectoor.de (union of all results)
68tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
68bl.deadbeef.com
59dnsbl.ahbl.org (union of all results)
51zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
45l2.bbfh.ext.sorbs.net
40probes.dnsbl.net.au
38dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
27dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
26dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
23blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
21dnsbl-0.uceprotect.net
21dnsbl.ahbl.org (result 127.0.0.4 = spam source)
11multi.surbl.org
7multi.uribl.com (result 127.0.0.2 = spam resource)
7multi.uribl.com (union of all results)
5dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
4rdts.dnsbl.net.au
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2blackholes.brainerd.net
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)

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
113527(total number of IP addresses whose names were tested, including 212 at SDSC)
70865hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
64537hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
56154(union of most domain zones)
39594abuse.rfc-ignorant.org
33267rddn.dnsbl.net.au
19831whois.rfc-ignorant.org (union of all results)
19734dynamic.rhs.mailpolice.com
10453whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
9378whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
8461l1.apews.org
7549hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3830hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3619webmail.rhs.mailpolice.com
746adv.rhs.mailpolice.com
662hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
658rhsbl.ahbl.org
371hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
280hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
153hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
94multi.surbl.org
71multi.uribl.com (result 127.0.0.2 = spam resource)
71postmaster.rfc-ignorant.org
71multi.uribl.com (union of all results)
59bogusmx.rfc-ignorant.org
53dsn.rfc-ignorant.org (zone not intended for this use)
31rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
31rhsbl.sorbs.net (union of all results)
23bulk.rhs.mailpolice.com
23dob.sibl.support-intelligence.net
16bl.deadbeef.com
15hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
9porn.rhs.mailpolice.com
2ex.dnsbl.org

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
61490(total number of domains tested, including 189 at SDSC)
54438hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
13569(union of most domain zones)
7725hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6011hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4739whois.rfc-ignorant.org (union of all results)
4245whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3220abuse.rfc-ignorant.org
3210bogusmx.rfc-ignorant.org
2766hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2191postmaster.rfc-ignorant.org
1600l1.apews.org
1213hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1162webmail.rhs.mailpolice.com
868multi.uribl.com (union of all results)
843multi.uribl.com (result 127.0.0.2 = spam resource)
768multi.surbl.org
757hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
494whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
483hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
478dsn.rfc-ignorant.org
298adv.rhs.mailpolice.com
235porn.rhs.mailpolice.com
215bulk.rhs.mailpolice.com
133rddn.dnsbl.net.au (zone not intended for this use)
111rhsbl.ahbl.org
65hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
52hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
44dynamic.rhs.mailpolice.com
42rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
42rhsbl.sorbs.net (union of all results)
25multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
15ex.dnsbl.org
7dob.sibl.support-intelligence.net
6fraud.rhs.mailpolice.com
2bl.deadbeef.com
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 8 May 2009.