Blacklists Compared

18 December 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, swl.spamhaus.org, and wl.mailspike.net zones because they are not blacklists. Because they are too aggressive to be widely useful the spam.dnsbl.sorbs.net and l2.apews.org zones are also excluded from the union.

HitsDNS Zone
86089(total number of IP addresses tested, including 163 at SDSC)
82466(union of most IP zones)
73749b.barracudacentral.org
72525zen.spamhaus.org (union of all results)
70124l2.apews.org
69904zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
69901cbl.abuseat.org
58596hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
55272dnsbl-1.uceprotect.net
53524bl.mailspike.net (union of all results)
44913bl.spameatingmonkey.net
43436zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
43193dnsbl-3.uceprotect.net
42605dnsbl-2.uceprotect.net
41550psbl.surriel.com
38907hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
37962bl.tiopan.com
35089bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
29590spam.dnsbl.sorbs.net
28162blackholes.five-ten-sg.com (union of all results)
27185bl.score.senderscore.com
25899bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
22131db.wpbl.info
19862bl.spamcop.net
18333dnsbl.sorbs.net (union of all results)
16697bl.mailspike.net (result 127.0.0.11 = very bad reputation)
16290blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
14439dnsbl.sorbs.net (result 127.0.0.10 = dialup)
12334ix.dnsbl.manitu.net
11718dnsbl.inps.de
11491zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
10280blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
9540mail-abuse.blacklist.jippg.org
8852no-more-funn.moensted.dk (union of all results)
6878bl.mailspike.net (result 127.0.0.12 = bad reputation)
6356no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
5767hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5668list.dnswl.org (not a blacklist!)
3543hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3212ips.backscatterer.org
2515wl.mailspike.net (union of all results) (not a blacklist!)
2507dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
2266hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2246no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2237wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2210bl.spamcannibal.org
1571blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1560dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1560spamsources.fabel.dk
1558korea.services.net
1133hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1113ubl.unsubscore.com
753dnsbl.njabl.org (union of all results)
727accredit.habeas.com (not a blacklist!)
704l2.bbfh.ext.sorbs.net
627tr.countries.nerd.dk
609query.bondedsender.org (not a blacklist!)
581dnsbl.njabl.org (result 127.0.0.9 = open proxy)
539aspews.ext.sorbs.net
386dnsbl.ahbl.org (union of all results)
320l1.bbfh.ext.sorbs.net
286zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
286zen.spamhaus.org (union of SBL and SBLCSS results)
275dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
254wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
180iadb2.isipp.com (not a blacklist!)
147iadb.isipp.com (not a blacklist!)
145no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
126dnsbl.njabl.org (result 127.0.0.2 = open relay)
123hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
94dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
94dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
94dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
76dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
74no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
71tor.dnsbl.sectoor.de (union of all results)
70tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
61no-more-funn.moensted.dk (result 127.0.0.9 = misc)
46dnsbl.njabl.org (result 127.0.0.4 = spam source)
35dnsbl.ahbl.org (result 127.0.0.4 = spam source)
24wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
21blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
20bl.deadbeef.com
19swl.spamhaus.org (union of all results) (not a blacklist!)
16zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
16multi.surbl.org
12hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
10swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
9swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
4dnsbl-0.uceprotect.net
2multi.uribl.com (result 127.0.0.2 = spam resource)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2multi.uribl.com (union of all results)
2spamguard.leadmon.net (union of all results)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
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
86089(total number of IP addresses whose names were tested, including 163 at SDSC)
53531hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
44749hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
38074(union of most domain zones)
32820abuse.rfc-ignorant.org
32094l1.apews.org
11585whois.rfc-ignorant.org (union of all results)
8066whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5315hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4136hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3519whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1666hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
691hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
421urired.spameatingmonkey.net
349hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
303dbl.spamhaus.org
166hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
122multi.surbl.org
74hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
43postmaster.rfc-ignorant.org
36multi.uribl.com (union of all results)
35multi.uribl.com (result 127.0.0.2 = spam resource)
27rhsbl.ahbl.org
26bogusmx.rfc-ignorant.org
25dsn.rfc-ignorant.org (zone not intended for this use)
23fresh.spameatingmonkey.net
23dob.sibl.support-intelligence.net
10hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
4bl.deadbeef.com
1multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
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
28043(total number of domains tested, including 137 at SDSC)
25768hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
8110(union of most domain zones)
5493hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2930whois.rfc-ignorant.org (union of all results)
2841hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2728whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2654hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2615abuse.rfc-ignorant.org
1430urired.spameatingmonkey.net
1369postmaster.rfc-ignorant.org
1096hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1087dbl.spamhaus.org
1044l1.apews.org
824multi.surbl.org
644hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
579multi.uribl.com (union of all results)
569multi.uribl.com (result 127.0.0.2 = spam resource)
416bogusmx.rfc-ignorant.org
405hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
275dsn.rfc-ignorant.org
202whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
142fresh.spameatingmonkey.net
115dob.sibl.support-intelligence.net
17hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
16hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
16rhsbl.ahbl.org
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8ex.dnsbl.org
7hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
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 21 December 2010.