Blacklists Compared

5 June 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
195330(total number of IP addresses tested, including 172 at SDSC)
192253(union of most IP zones)
180488zen.spamhaus.org (union of all results)
180264b.barracudacentral.org
167167l2.apews.org
149377cbl.abuseat.org
149375zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
135825hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
134970bl.mailspike.net (union of all results)
131866dnsbl-2.uceprotect.net
131551dnsbl-1.uceprotect.net
127435dnsbl-3.uceprotect.net
123743bl.spameatingmonkey.net
106777zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
106015dnsbl.sorbs.net (union of all results)
105447bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
92696ubl.unsubscore.com
90008psbl.surriel.com
84593hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
66603dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
64019bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
63080spam.dnsbl.sorbs.net
55847bl.tiopan.com
52213dnsbl.sorbs.net (result 127.0.0.10 = dialup)
47842blackholes.five-ten-sg.com (union of all results)
46527bl.spamcop.net
41955blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
41296bl.score.senderscore.com
38646db.wpbl.info
37208zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
28215ix.dnsbl.manitu.net
25578no-more-funn.moensted.dk (union of all results)
19525no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
18223mail-abuse.blacklist.jippg.org
16192bl.mailspike.net (result 127.0.0.12 = bad reputation)
14781dnsbl.inps.de
11764hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
7578bl.mailspike.net (result 127.0.0.11 = very bad reputation)
5965dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5812no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
5437bl.spamcannibal.org
5110korea.services.net
4607blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
3947list.dnswl.org (not a blacklist!)
3922dnsbl.ahbl.org (union of all results)
3873spamsources.fabel.dk
3268ips.backscatterer.org
2835hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2362dnsbl.ahbl.org (result 127.0.0.4 = spam source)
2130tr.countries.nerd.dk
2044wl.mailspike.net (union of all results) (not a blacklist!)
1922dnsbl.njabl.org (union of all results)
1833hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1680dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1615wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1507dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1288hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1245blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
449accredit.habeas.com (not a blacklist!)
390wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
383aspews.ext.sorbs.net
370query.bondedsender.org (not a blacklist!)
318zen.spamhaus.org (union of SBL and SBLCSS results)
310zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
178no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
166tor.dnsbl.sectoor.de (union of all results)
164tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
148iadb2.isipp.com (not a blacklist!)
147no-more-funn.moensted.dk (result 127.0.0.9 = misc)
146dnsbl.njabl.org (result 127.0.0.2 = open relay)
117iadb.isipp.com (not a blacklist!)
109no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
100hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
96dnsbl.njabl.org (result 127.0.0.4 = spam source)
53dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
40bl.deadbeef.com
39wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
35blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
15spamguard.leadmon.net (union of all results)
12multi.surbl.org
11spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
8zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
8zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
8dnsbl-0.uceprotect.net
6multi.uribl.com (result 127.0.0.2 = spam resource)
6multi.uribl.com (union of all results)
5hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2l2.bbfh.ext.sorbs.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
195330(total number of IP addresses whose names were tested, including 172 at SDSC)
130171hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
120384hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
111648(union of most domain zones)
94782l1.apews.org
86831abuse.rfc-ignorant.org
37271whois.rfc-ignorant.org (union of all results)
36210dynamic.rhs.mailpolice.com
26979whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
12229hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
10292whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5925webmail.rhs.mailpolice.com
3083hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2933hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
838adv.rhs.mailpolice.com
470hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
327urired.spameatingmonkey.net
305hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
163dbl.spamhaus.org
155hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
67hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
65postmaster.rfc-ignorant.org
53rhsbl.ahbl.org
48rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
48rhsbl.sorbs.net (union of all results)
44dsn.rfc-ignorant.org (zone not intended for this use)
38bogusmx.rfc-ignorant.org
28multi.uribl.com (result 127.0.0.2 = spam resource)
28bulk.rhs.mailpolice.com
28multi.uribl.com (union of all results)
21multi.surbl.org
20porn.rhs.mailpolice.com
14fresh.spameatingmonkey.net
12dob.sibl.support-intelligence.net
4bl.deadbeef.com
3hostkarma.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
49855(total number of domains tested, including 154 at SDSC)
46970hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
10103(union of most domain zones)
6284hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3605whois.rfc-ignorant.org (union of all results)
3356whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3024hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2989abuse.rfc-ignorant.org
2050hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1843urired.spameatingmonkey.net
1752postmaster.rfc-ignorant.org
1166l1.apews.org
838hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
741bogusmx.rfc-ignorant.org
739webmail.rhs.mailpolice.com
660dbl.spamhaus.org
607multi.surbl.org
589hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
459multi.uribl.com (union of all results)
449multi.uribl.com (result 127.0.0.2 = spam resource)
355dsn.rfc-ignorant.org
260adv.rhs.mailpolice.com
249whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
157porn.rhs.mailpolice.com
62bulk.rhs.mailpolice.com
52hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
27rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
27rhsbl.sorbs.net (union of all results)
25hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
22rhsbl.ahbl.org
19hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
12ex.dnsbl.org
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8dob.sibl.support-intelligence.net
7dynamic.rhs.mailpolice.com
2fresh.spameatingmonkey.net
2fraud.rhs.mailpolice.com
2bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 10 June 2010.