Blacklists Compared

16 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
116212(total number of IP addresses tested, including 204 at SDSC)
112988(union of most IP zones)
98504zen.spamhaus.org (union of all results)
96767l2.apews.org
94206b.barracudacentral.org
89065t1.dnsbl.net.au
73503cbl.abuseat.org
73457zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
68765hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
62800dnsbl-1.uceprotect.net
62242dnsbl-2.uceprotect.net
61022dnsbl-3.uceprotect.net
58904zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
57107psbl.surriel.com
56985ubl.unsubscore.com
56575dnsbl.sorbs.net (union of all results)
34532hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
32465dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
29997no-more-funn.moensted.dk (union of all results)
28862blackholes.five-ten-sg.com (union of all results)
28653dnsbl.sorbs.net (result 127.0.0.10 = dialup)
25808blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
25075bl.spamcop.net
24754db.wpbl.info
20623no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
19731zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
14266ix.dnsbl.manitu.net
12667spam.dnsbl.sorbs.net
11169hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8766mail-abuse.blacklist.jippg.org
8442no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
7975dnsbl.inps.de
6381bl.spamcannibal.org
6318korea.services.net
6189ips.backscatterer.org
6148tr.countries.nerd.dk
4010list.dnswl.org (not a blacklist!)
3906hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3366hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2922spamsources.fabel.dk
2027blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2010hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1806dnsbl.njabl.org (union of all results)
1560rmst.dnsbl.net.au
1514dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1009blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
805aspews.ext.sorbs.net
754l2.bbfh.ext.sorbs.net
748l1.bbfh.ext.sorbs.net
669hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
469no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
396query.bondedsender.org (not a blacklist!)
376no-more-funn.moensted.dk (result 127.0.0.9 = misc)
353dnsbl.sorbs.net (result 127.0.0.6 = spam source)
257zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
184accredit.habeas.com (not a blacklist!)
181dnsbl.njabl.org (result 127.0.0.4 = spam source)
160iadb2.isipp.com (not a blacklist!)
129no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
120iadb.isipp.com (not a blacklist!)
111dnsbl.njabl.org (result 127.0.0.2 = open relay)
97tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
97tor.dnsbl.sectoor.de (union of all results)
88spamguard.leadmon.net (union of all results)
86spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
72bl.deadbeef.com
56probes.dnsbl.net.au
52dnsbl.ahbl.org (union of all results)
46dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
45zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
34dnsbl-0.uceprotect.net
33dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
20dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
18blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
11multi.surbl.org
11hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
8multi.uribl.com (union of all results)
7multi.uribl.com (result 127.0.0.2 = spam resource)
7rdts.dnsbl.net.au
6dnsbl.ahbl.org (result 127.0.0.4 = spam source)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)


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
116212(total number of IP addresses whose names were tested, including 204 at SDSC)
75223hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
74269hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
67887hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
60919(union of most domain zones)
52787l1.apews.org
43655abuse.rfc-ignorant.org
35791rddn.dnsbl.net.au
22786dynamic.rhs.mailpolice.com
19994whois.rfc-ignorant.org (union of all results)
11172whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
8822whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3632hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3597webmail.rhs.mailpolice.com
1824hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
680adv.rhs.mailpolice.com
501rhsbl.ahbl.org
277hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
277hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
151hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
76multi.surbl.org
56postmaster.rfc-ignorant.org
51bogusmx.rfc-ignorant.org
45multi.uribl.com (result 127.0.0.2 = spam resource)
45multi.uribl.com (union of all results)
43dsn.rfc-ignorant.org (zone not intended for this use)
39rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
39rhsbl.sorbs.net (union of all results)
21bulk.rhs.mailpolice.com
17dob.sibl.support-intelligence.net
13bl.deadbeef.com
12hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
8porn.rhs.mailpolice.com
2ex.dnsbl.org
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)


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
67720(total number of domains tested, including 186 at SDSC)
67616hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
61180hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
15529(union of most domain zones)
7697hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6305whois.rfc-ignorant.org (union of all results)
5755whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3471bogusmx.rfc-ignorant.org
3306abuse.rfc-ignorant.org
2706hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2278postmaster.rfc-ignorant.org
1691l1.apews.org
1551hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1218webmail.rhs.mailpolice.com
979multi.uribl.com (union of all results)
958multi.uribl.com (result 127.0.0.2 = spam resource)
881hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
789multi.surbl.org
685hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
550whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
507dsn.rfc-ignorant.org
300adv.rhs.mailpolice.com
272porn.rhs.mailpolice.com
184bulk.rhs.mailpolice.com
151rddn.dnsbl.net.au (zone not intended for this use)
99rhsbl.ahbl.org
73hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
65dynamic.rhs.mailpolice.com
63hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
45rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
45rhsbl.sorbs.net (union of all results)
20multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
12ex.dnsbl.org
10dob.sibl.support-intelligence.net
6fraud.rhs.mailpolice.com
3bl.deadbeef.com
1multi.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 22 May 2009.