Blacklists Compared

6 November 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
118982(total number of IP addresses tested, including 175 at SDSC)
115317(union of most IP zones)
106896b.barracudacentral.org
105017zen.spamhaus.org (union of all results)
102312l2.apews.org
95253zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
95238cbl.abuseat.org
83237hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
79147dnsbl-1.uceprotect.net
71039dnsbl-2.uceprotect.net
70387dnsbl-3.uceprotect.net
68618zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
67503psbl.surriel.com
66278bl.mailspike.net (union of all results)
61458bl.spameatingmonkey.net
52663bl.tiopan.com
43028hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
39973spam.dnsbl.sorbs.net
38132blackholes.five-ten-sg.com (union of all results)
34396ubl.unsubscore.com
34035bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
33322bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
32334bl.score.senderscore.com
27483dnsbl.sorbs.net (union of all results)
26394db.wpbl.info
25817blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
25219bl.spamcop.net
19677dnsbl.sorbs.net (result 127.0.0.10 = dialup)
16095bl.mailspike.net (result 127.0.0.11 = very bad reputation)
15694zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
15685ix.dnsbl.manitu.net
14101dnsbl.inps.de
12809no-more-funn.moensted.dk (union of all results)
12218mail-abuse.blacklist.jippg.org
11892hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
10975blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
9191bl.mailspike.net (result 127.0.0.12 = bad reputation)
8553no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
5416dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4657list.dnswl.org (not a blacklist!)
4562wl.mailspike.net (union of all results) (not a blacklist!)
4444dnsbl.ahbl.org (union of all results)
4019dnsbl.ahbl.org (result 127.0.0.4 = spam source)
3751no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3700ips.backscatterer.org
3459hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2990bl.spamcannibal.org
2801dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
2732korea.services.net
2532wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2392spamsources.fabel.dk
2176hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1976wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1322blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1117dnsbl.njabl.org (union of all results)
1041hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
886dnsbl.njabl.org (result 127.0.0.9 = open proxy)
761tr.countries.nerd.dk
600accredit.habeas.com (not a blacklist!)
583l2.bbfh.ext.sorbs.net
536query.bondedsender.org (not a blacklist!)
449aspews.ext.sorbs.net
376no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
341dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
322l1.bbfh.ext.sorbs.net
247zen.spamhaus.org (union of SBL and SBLCSS results)
234zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
169dnsbl.njabl.org (result 127.0.0.2 = open relay)
165dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
165dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
165dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
150iadb2.isipp.com (not a blacklist!)
132no-more-funn.moensted.dk (result 127.0.0.9 = misc)
122iadb.isipp.com (not a blacklist!)
115tor.dnsbl.sectoor.de (union of all results)
113tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
96hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
84dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
62dnsbl.njabl.org (result 127.0.0.4 = spam source)
62no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
54wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
30bl.deadbeef.com
19swl.spamhaus.org (union of all results) (not a blacklist!)
18blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
13zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
11swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
8zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
8swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
8multi.surbl.org
7dnsbl-0.uceprotect.net
5spamguard.leadmon.net (union of all results)
4spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1multi.uribl.com (union of all results)
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
118982(total number of IP addresses whose names were tested, including 175 at SDSC)
68273hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
58499hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
51187(union of most domain zones)
44693abuse.rfc-ignorant.org
43427l1.apews.org
18627whois.rfc-ignorant.org (union of all results)
14179whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6346hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4448whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4412hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1860hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
721hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
391hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
335urired.spameatingmonkey.net
275hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
261dbl.spamhaus.org
142hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
63postmaster.rfc-ignorant.org
38rhsbl.ahbl.org
31dsn.rfc-ignorant.org (zone not intended for this use)
29dob.sibl.support-intelligence.net
25bogusmx.rfc-ignorant.org
22multi.surbl.org
17fresh.spameatingmonkey.net
10hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
9multi.uribl.com (result 127.0.0.2 = spam resource)
9multi.uribl.com (union of all results)
5hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1bl.deadbeef.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
52821(total number of domains tested, including 129 at SDSC)
48229hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
10337(union of most domain zones)
5523hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3175urired.spameatingmonkey.net
2831hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2710whois.rfc-ignorant.org (union of all results)
2570abuse.rfc-ignorant.org
2479whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2456hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1785dbl.spamhaus.org
1762hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1361postmaster.rfc-ignorant.org
1075multi.surbl.org
1054l1.apews.org
786hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
660multi.uribl.com (union of all results)
650multi.uribl.com (result 127.0.0.2 = spam resource)
447bogusmx.rfc-ignorant.org
394hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
243dsn.rfc-ignorant.org
231whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
31fresh.spameatingmonkey.net
25hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
24dob.sibl.support-intelligence.net
19hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
19rhsbl.ahbl.org
11ex.dnsbl.org
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
7hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 11 November 2010.