Blacklists Compared

13 March 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
192593(total number of IP addresses tested, including 172 at SDSC)
188769(union of most IP zones)
179963b.barracudacentral.org
176933zen.spamhaus.org (union of all results)
159844l2.apews.org
153242cbl.abuseat.org
153216zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
142091hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
137855dnsbl-1.uceprotect.net
128712dnsbl-2.uceprotect.net
124979dnsbl-3.uceprotect.net
123707bl.mailspike.net (union of all results)
118985dnsbl.sorbs.net (union of all results)
108343psbl.surriel.com
106287zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
99171ubl.unsubscore.com
90188dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
82040hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
61261bl.mailspike.net (result 127.0.0.12 = bad reputation)
59734bl.spameatingmonkey.net
49709spam.dnsbl.sorbs.net
43979blackholes.five-ten-sg.com (union of all results)
43768dnsbl.sorbs.net (result 127.0.0.10 = dialup)
40042blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
38622bl.spamcop.net
37604no-more-funn.moensted.dk (union of all results)
35786bl.tiopan.com
33560db.wpbl.info
32402zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
31990bl.mailspike.net (result 127.0.0.11 = very bad reputation)
29342bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
27255no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
24253ix.dnsbl.manitu.net
21284bl.score.senderscore.com
18507bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
17134mail-abuse.blacklist.jippg.org
12552hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
11356dnsbl.inps.de
8392no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
8267korea.services.net
6411bl.spamcannibal.org
4684list.dnswl.org (not a blacklist!)
4553dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4185dnsbl.ahbl.org (union of all results)
4154spamsources.fabel.dk
4065dnsbl.ahbl.org (result 127.0.0.4 = spam source)
3141blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
3104ips.backscatterer.org
3053wl.mailspike.net (union of all results) (not a blacklist!)
2872hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2308wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2198hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1955tr.countries.nerd.dk
1834dnsbl.njabl.org (union of all results)
1607dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1386hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1294no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
788blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
745wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
639no-more-funn.moensted.dk (result 127.0.0.9 = misc)
591zen.spamhaus.org (union of SBL and SBLCSS results)
522zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
481aspews.ext.sorbs.net
460accredit.habeas.com (not a blacklist!)
389query.bondedsender.org (not a blacklist!)
167iadb2.isipp.com (not a blacklist!)
151dnsbl.njabl.org (result 127.0.0.2 = open relay)
138l2.bbfh.ext.sorbs.net
127iadb.isipp.com (not a blacklist!)
119dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
98no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
87tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
87tor.dnsbl.sectoor.de (union of all results)
76dnsbl.njabl.org (result 127.0.0.4 = spam source)
71hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
69zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
46l1.bbfh.ext.sorbs.net
32bl.deadbeef.com
31dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
30dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
11multi.uribl.com (result 127.0.0.2 = spam resource)
11multi.uribl.com (union of all results)
10multi.surbl.org
9dnsbl-0.uceprotect.net
7zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
7blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
6hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
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)
2blackholes.brainerd.net
1wadb.isipp.com
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)
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
192593(total number of IP addresses whose names were tested, including 172 at SDSC)
116790hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
103547hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
97486(union of most domain zones)
83208l1.apews.org
77344abuse.rfc-ignorant.org
35161whois.rfc-ignorant.org (union of all results)
30867dynamic.rhs.mailpolice.com
27655whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
11532hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
7506whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4259webmail.rhs.mailpolice.com
3140hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1559hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
886adv.rhs.mailpolice.com
523hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
425urired.spameatingmonkey.net
381hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
332dbl.spamhaus.org
119rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
119rhsbl.sorbs.net (union of all results)
101hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
92hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
76multi.uribl.com (result 127.0.0.2 = spam resource)
76multi.uribl.com (union of all results)
61postmaster.rfc-ignorant.org
44dsn.rfc-ignorant.org (zone not intended for this use)
41multi.surbl.org
40bulk.rhs.mailpolice.com
38rhsbl.ahbl.org
34fresh.spameatingmonkey.net
32dob.sibl.support-intelligence.net
31bogusmx.rfc-ignorant.org
13porn.rhs.mailpolice.com
2bl.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
83011(total number of domains tested, including 157 at SDSC)
79897hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16681(union of most domain zones)
7599hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7188whois.rfc-ignorant.org (union of all results)
6909whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4982hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3805urired.spameatingmonkey.net
3506abuse.rfc-ignorant.org
2548hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2130postmaster.rfc-ignorant.org
1371bogusmx.rfc-ignorant.org
1356l1.apews.org
841hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
773webmail.rhs.mailpolice.com
751dbl.spamhaus.org
634multi.surbl.org
592multi.uribl.com (union of all results)
579multi.uribl.com (result 127.0.0.2 = spam resource)
561hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
461dsn.rfc-ignorant.org
281adv.rhs.mailpolice.com
279whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
203porn.rhs.mailpolice.com
74hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
63bulk.rhs.mailpolice.com
35rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
35rhsbl.sorbs.net (union of all results)
24dob.sibl.support-intelligence.net
23hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
23rhsbl.ahbl.org
22fresh.spameatingmonkey.net
19hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
13dynamic.rhs.mailpolice.com
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10ex.dnsbl.org
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2fraud.rhs.mailpolice.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 18 March 2010.