Blacklists Compared

6 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
201744(total number of IP addresses tested, including 170 at SDSC)
197882(union of most IP zones)
189030b.barracudacentral.org
185230zen.spamhaus.org (union of all results)
167672l2.apews.org
161293hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
154058zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
154033cbl.abuseat.org
143429bl.mailspike.net (union of all results)
140585dnsbl-1.uceprotect.net
134108dnsbl-2.uceprotect.net
131193dnsbl-3.uceprotect.net
122599dnsbl.sorbs.net (union of all results)
109165zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
105225psbl.surriel.com
96284ubl.unsubscore.com
89444dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
86498hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
64470bl.spameatingmonkey.net
55741bl.mailspike.net (result 127.0.0.12 = bad reputation)
51367bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
47994spam.dnsbl.sorbs.net
47574dnsbl.sorbs.net (result 127.0.0.10 = dialup)
47047blackholes.five-ten-sg.com (union of all results)
43429bl.spamcop.net
42869blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
40687no-more-funn.moensted.dk (union of all results)
38397db.wpbl.info
35485bl.mailspike.net (result 127.0.0.11 = very bad reputation)
35396zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
34586bl.tiopan.com
30352bl.score.senderscore.com
29294no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
26685ix.dnsbl.manitu.net
25967bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
18606mail-abuse.blacklist.jippg.org
11930hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
11535dnsbl.inps.de
8848no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
8453korea.services.net
6399bl.spamcannibal.org
4579list.dnswl.org (not a blacklist!)
4519dnsbl.ahbl.org (union of all results)
4412dnsbl.ahbl.org (result 127.0.0.4 = spam source)
4349spamsources.fabel.dk
3216blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2967hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2904wl.mailspike.net (union of all results) (not a blacklist!)
2791ips.backscatterer.org
2258wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2162dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1988dnsbl.njabl.org (union of all results)
1965hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1806no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1800tr.countries.nerd.dk
1747dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1452hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
947blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
646wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
632no-more-funn.moensted.dk (result 127.0.0.9 = misc)
483zen.spamhaus.org (union of SBL and SBLCSS results)
470accredit.habeas.com (not a blacklist!)
467aspews.ext.sorbs.net
442zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
388query.bondedsender.org (not a blacklist!)
167no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
155dnsbl.njabl.org (result 127.0.0.2 = open relay)
150l2.bbfh.ext.sorbs.net
135iadb2.isipp.com (not a blacklist!)
111tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
111tor.dnsbl.sectoor.de (union of all results)
107dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
94iadb.isipp.com (not a blacklist!)
86dnsbl.njabl.org (result 127.0.0.4 = spam source)
84hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
73l1.bbfh.ext.sorbs.net
41zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
37dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
34bl.deadbeef.com
31dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
14blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
11multi.uribl.com (union of all results)
10multi.uribl.com (result 127.0.0.2 = spam resource)
9zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
9dnsbl-0.uceprotect.net
8blackholes.brainerd.net
6multi.surbl.org
4hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4spamguard.leadmon.net (union of all results)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)

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
201744(total number of IP addresses whose names were tested, including 170 at SDSC)
123437hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
111901hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
102960(union of most domain zones)
88243l1.apews.org
81214abuse.rfc-ignorant.org
36413whois.rfc-ignorant.org (union of all results)
33430dynamic.rhs.mailpolice.com
28557whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
11263hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
7856whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4258webmail.rhs.mailpolice.com
3202hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2086hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
861adv.rhs.mailpolice.com
480hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
456urired.spameatingmonkey.net
313hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
275dbl.spamhaus.org
130hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
109rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
109rhsbl.sorbs.net (union of all results)
84hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
63postmaster.rfc-ignorant.org
59multi.uribl.com (result 127.0.0.2 = spam resource)
59multi.uribl.com (union of all results)
48rhsbl.ahbl.org
42dsn.rfc-ignorant.org (zone not intended for this use)
37bulk.rhs.mailpolice.com
35bogusmx.rfc-ignorant.org
25dob.sibl.support-intelligence.net
24fresh.spameatingmonkey.net
23multi.surbl.org
21porn.rhs.mailpolice.com
6bl.deadbeef.com
2hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1fraud.rhs.mailpolice.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
82138(total number of domains tested, including 153 at SDSC)
79195hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
15889(union of most domain zones)
7902hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6857whois.rfc-ignorant.org (union of all results)
6558whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4767hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3522urired.spameatingmonkey.net
3428abuse.rfc-ignorant.org
2613hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2061postmaster.rfc-ignorant.org
1350bogusmx.rfc-ignorant.org
1286l1.apews.org
1112hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
937dbl.spamhaus.org
884multi.surbl.org
855multi.uribl.com (union of all results)
845multi.uribl.com (result 127.0.0.2 = spam resource)
728webmail.rhs.mailpolice.com
518hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
436dsn.rfc-ignorant.org
299whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
293adv.rhs.mailpolice.com
170porn.rhs.mailpolice.com
76bulk.rhs.mailpolice.com
72hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
43fresh.spameatingmonkey.net
29rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
29rhsbl.sorbs.net (union of all results)
23hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
19hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
18rhsbl.ahbl.org
16dob.sibl.support-intelligence.net
11dynamic.rhs.mailpolice.com
11ex.dnsbl.org
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
4hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1fraud.rhs.mailpolice.com
1bl.deadbeef.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 11 March 2010.