Blacklists Compared

25 April 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
104933(total number of IP addresses tested, including 198 at SDSC)
101438(union of most IP zones)
86702zen.spamhaus.org (union of all results)
85651l2.apews.org
84967b.barracudacentral.org
75538t1.dnsbl.net.au
63714cbl.abuseat.org
63647zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
59847dnsbl-3.uceprotect.net
59349dnsbl-2.uceprotect.net
57555hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
53422dnsbl-1.uceprotect.net
49113zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
43012psbl.surriel.com
41816dnsbl.sorbs.net (union of all results)
36471ubl.unsubscore.com
31320hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
27088no-more-funn.moensted.dk (union of all results)
25097blackholes.five-ten-sg.com (union of all results)
24243dnsbl.sorbs.net (result 127.0.0.10 = dialup)
22219blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
20670zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
20255no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
19555dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
19163bl.spamcop.net
15908db.wpbl.info
12752ix.dnsbl.manitu.net
12294tr.countries.nerd.dk
9415hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
9311spam.dnsbl.sorbs.net
7872ips.backscatterer.org
6297bl.spamcannibal.org
6030no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
5233dnsbl.inps.de
3982list.dnswl.org (not a blacklist!)
3672mail-abuse.blacklist.jippg.org
3549hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3456korea.services.net
3383hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2794spamsources.fabel.dk
2003hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1845blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
1700dnsbl.njabl.org (union of all results)
1350dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1276rmst.dnsbl.net.au
1013blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
931aspews.ext.sorbs.net
481no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
375query.bondedsender.org (not a blacklist!)
314dnsbl.sorbs.net (result 127.0.0.6 = spam source)
298no-more-funn.moensted.dk (result 127.0.0.9 = misc)
258zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
238dnsbl.njabl.org (result 127.0.0.4 = spam source)
199accredit.habeas.com (not a blacklist!)
160iadb2.isipp.com (not a blacklist!)
121iadb.isipp.com (not a blacklist!)
118hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
112dnsbl.njabl.org (result 127.0.0.2 = open relay)
93spamguard.leadmon.net (union of all results)
92spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
84no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
61tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
61tor.dnsbl.sectoor.de (union of all results)
58bl.deadbeef.com
55zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
54dnsbl.ahbl.org (union of all results)
48probes.dnsbl.net.au
39l2.bbfh.ext.sorbs.net
33dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
28dnsbl-0.uceprotect.net
20blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
20dnsbl.ahbl.org (result 127.0.0.4 = spam source)
19dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
19dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
10multi.surbl.org
7multi.uribl.com (result 127.0.0.2 = spam resource)
7multi.uribl.com (union of all results)
4dnsbl.sorbs.net (result 127.0.0.5 = open relay)
4rdts.dnsbl.net.au
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1blackholes.brainerd.net
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
104933(total number of IP addresses whose names were tested, including 198 at SDSC)
65976hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
60577hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
51838(union of most domain zones)
44745l1.apews.org
36741abuse.rfc-ignorant.org
30275rddn.dnsbl.net.au
18741whois.rfc-ignorant.org (union of all results)
18165dynamic.rhs.mailpolice.com
9697whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
9044whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
7040hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4009hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3078webmail.rhs.mailpolice.com
734adv.rhs.mailpolice.com
684hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
567rhsbl.ahbl.org
461hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
236hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
90multi.surbl.org
72postmaster.rfc-ignorant.org
71hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
57bogusmx.rfc-ignorant.org
56dsn.rfc-ignorant.org (zone not intended for this use)
38multi.uribl.com (result 127.0.0.2 = spam resource)
38bulk.rhs.mailpolice.com
38multi.uribl.com (union of all results)
24rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
24rhsbl.sorbs.net (union of all results)
23hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
17dob.sibl.support-intelligence.net
12bl.deadbeef.com
6porn.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
75469(total number of domains tested, including 166 at SDSC)
66718hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16209(union of most domain zones)
9056hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7681hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
6011whois.rfc-ignorant.org (union of all results)
5468whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3907abuse.rfc-ignorant.org
3617bogusmx.rfc-ignorant.org
3100hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2469postmaster.rfc-ignorant.org
1862l1.apews.org
1449webmail.rhs.mailpolice.com
1360hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1156hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
957hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
846multi.surbl.org
797multi.uribl.com (union of all results)
766multi.uribl.com (result 127.0.0.2 = spam resource)
586dsn.rfc-ignorant.org
543whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
319adv.rhs.mailpolice.com
298porn.rhs.mailpolice.com
193bulk.rhs.mailpolice.com
132rddn.dnsbl.net.au (zone not intended for this use)
112rhsbl.ahbl.org
57dynamic.rhs.mailpolice.com
43hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
40hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
37rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
37rhsbl.sorbs.net (union of all results)
30multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
15ex.dnsbl.org
7dob.sibl.support-intelligence.net
2fraud.rhs.mailpolice.com
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 1 May 2009.