Blacklists Compared

10 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
178691(total number of IP addresses tested, including 191 at SDSC)
175100(union of most IP zones)
164336zen.spamhaus.org (union of all results)
164097b.barracudacentral.org
149714l2.apews.org
141087zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
141084cbl.abuseat.org
125203hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
124040dnsbl-1.uceprotect.net
122666dnsbl-2.uceprotect.net
118484dnsbl-3.uceprotect.net
116776bl.mailspike.net (union of all results)
110192dnsbl.sorbs.net (union of all results)
99857psbl.surriel.com
99139zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
85187ubl.unsubscore.com
82530hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
81330dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
58982bl.spameatingmonkey.net
56495spam.dnsbl.sorbs.net
52174bl.mailspike.net (result 127.0.0.12 = bad reputation)
42737dnsbl.sorbs.net (result 127.0.0.10 = dialup)
38107bl.tiopan.com
35716blackholes.five-ten-sg.com (union of all results)
33951no-more-funn.moensted.dk (union of all results)
31964blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
31509bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
31146bl.spamcop.net
30493zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
30135bl.mailspike.net (result 127.0.0.11 = very bad reputation)
29440db.wpbl.info
26194no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
23736ix.dnsbl.manitu.net
21330bl.score.senderscore.com
18861bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
13813mail-abuse.blacklist.jippg.org
11073dnsbl.inps.de
10167hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
6872korea.services.net
6499no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
5703dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5703bl.spamcannibal.org
4530dnsbl.ahbl.org (union of all results)
4422dnsbl.ahbl.org (result 127.0.0.4 = spam source)
4323list.dnswl.org (not a blacklist!)
3456spamsources.fabel.dk
3056wl.mailspike.net (union of all results) (not a blacklist!)
2955blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2800hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2510ips.backscatterer.org
2313tr.countries.nerd.dk
2265wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2021hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1792dnsbl.njabl.org (union of all results)
1569dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1332hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
791wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
781blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
678no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
578no-more-funn.moensted.dk (result 127.0.0.9 = misc)
484aspews.ext.sorbs.net
452accredit.habeas.com (not a blacklist!)
430zen.spamhaus.org (union of SBL and SBLCSS results)
396zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
382query.bondedsender.org (not a blacklist!)
157iadb2.isipp.com (not a blacklist!)
141dnsbl.njabl.org (result 127.0.0.2 = open relay)
135l2.bbfh.ext.sorbs.net
123iadb.isipp.com (not a blacklist!)
106dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
100tor.dnsbl.sectoor.de (union of all results)
99tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
88no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
84hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
82dnsbl.njabl.org (result 127.0.0.4 = spam source)
74l1.bbfh.ext.sorbs.net
40bl.deadbeef.com
34zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
29dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
23dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
18multi.surbl.org
14blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
13dnsbl-0.uceprotect.net
12hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
7multi.uribl.com (result 127.0.0.2 = spam resource)
7multi.uribl.com (union of all results)
5spamguard.leadmon.net (union of all results)
4spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1blackholes.brainerd.net

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
178691(total number of IP addresses whose names were tested, including 191 at SDSC)
112225hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
102040hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
95270(union of most domain zones)
80666l1.apews.org
76381abuse.rfc-ignorant.org
33725whois.rfc-ignorant.org (union of all results)
30516dynamic.rhs.mailpolice.com
25349whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
11199hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
8376whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4135webmail.rhs.mailpolice.com
3060hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1548hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
871adv.rhs.mailpolice.com
495hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
340urired.spameatingmonkey.net
266hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
243dbl.spamhaus.org
94hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
88hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
87multi.uribl.com (result 127.0.0.2 = spam resource)
87multi.uribl.com (union of all results)
83rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
83rhsbl.sorbs.net (union of all results)
59multi.surbl.org
58postmaster.rfc-ignorant.org
41dsn.rfc-ignorant.org (zone not intended for this use)
34bulk.rhs.mailpolice.com
33bogusmx.rfc-ignorant.org
31rhsbl.ahbl.org
17porn.rhs.mailpolice.com
12fresh.spameatingmonkey.net
11dob.sibl.support-intelligence.net
6bl.deadbeef.com
4hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)

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
83498(total number of domains tested, including 173 at SDSC)
60510hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
12683(union of most domain zones)
6754hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4930whois.rfc-ignorant.org (union of all results)
4651whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3574hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3028abuse.rfc-ignorant.org
2869urired.spameatingmonkey.net
2216hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1823postmaster.rfc-ignorant.org
1264l1.apews.org
1152bogusmx.rfc-ignorant.org
949hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
785dbl.spamhaus.org
781multi.surbl.org
748webmail.rhs.mailpolice.com
635multi.uribl.com (union of all results)
626multi.uribl.com (result 127.0.0.2 = spam resource)
505hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
327dsn.rfc-ignorant.org
279whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
269adv.rhs.mailpolice.com
145porn.rhs.mailpolice.com
54hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
53bulk.rhs.mailpolice.com
39fresh.spameatingmonkey.net
28rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
28rhsbl.sorbs.net (union of all results)
27dob.sibl.support-intelligence.net
26hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
25hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
20rhsbl.ahbl.org
13ex.dnsbl.org
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8dynamic.rhs.mailpolice.com
4hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2fraud.rhs.mailpolice.com
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1bl.deadbeef.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 15 April 2010.