Blacklists Compared

13 February 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, and iadb2.isipp.com 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
196859(total number of IP addresses tested, including 243 at SDSC)
193202(union of most IP zones)
184394b.barracudacentral.org
180459zen.spamhaus.org (union of all results)
163149l2.apews.org
153034zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
152801cbl.abuseat.org
139199dnsbl-1.uceprotect.net
135678hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
127636dnsbl-2.uceprotect.net
123229dnsbl-3.uceprotect.net
120534psbl.surriel.com
119842dnsbl.sorbs.net (union of all results)
110189ubl.unsubscore.com
107798zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
90371dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
84969hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
57799bl.spameatingmonkey.net
47594blackholes.five-ten-sg.com (union of all results)
46674dnsbl.sorbs.net (result 127.0.0.10 = dialup)
43174bl.spamcop.net
43060blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
42657bl.tiopan.com
38663no-more-funn.moensted.dk (union of all results)
37491db.wpbl.info
34910bl.score.senderscore.com
32101zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
28128no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
27629ix.dnsbl.manitu.net
21098mail-abuse.blacklist.jippg.org
14567spam.dnsbl.sorbs.net
13836hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
11036dnsbl.inps.de
9948korea.services.net
8863no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
6340bl.spamcannibal.org
4676list.dnswl.org (not a blacklist!)
3926spamsources.fabel.dk
3337blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2967hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2840ips.backscatterer.org
2373tr.countries.nerd.dk
2245dnsbl.ahbl.org (union of all results)
2148dnsbl.ahbl.org (result 127.0.0.4 = spam source)
2061dnsbl.njabl.org (union of all results)
2003hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1810dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1429hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1180blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1069no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
626zen.spamhaus.org (union of SBL and SBLCSS results)
587no-more-funn.moensted.dk (result 127.0.0.9 = misc)
569zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
498l2.bbfh.ext.sorbs.net
478accredit.habeas.com (not a blacklist!)
465aspews.ext.sorbs.net
408query.bondedsender.org (not a blacklist!)
257l1.bbfh.ext.sorbs.net
242dnsbl.sorbs.net (result 127.0.0.6 = spam source)
166dnsbl.njabl.org (result 127.0.0.2 = open relay)
166iadb2.isipp.com (not a blacklist!)
132no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
128iadb.isipp.com (not a blacklist!)
112tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
112tor.dnsbl.sectoor.de (union of all results)
110hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
97dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
85dnsbl.njabl.org (result 127.0.0.4 = spam source)
57zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
36dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
36bl.deadbeef.com
34dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
17blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
14zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
12dnsbl-0.uceprotect.net
9multi.uribl.com (result 127.0.0.2 = spam resource)
9multi.uribl.com (union of all results)
5blackholes.brainerd.net
4multi.surbl.org
3spamguard.leadmon.net (union of all results)
2dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)

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
196859(total number of IP addresses whose names were tested, including 243 at SDSC)
125171hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
111391hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
102281(union of most domain zones)
88743l1.apews.org
82211abuse.rfc-ignorant.org
35576dynamic.rhs.mailpolice.com
34605whois.rfc-ignorant.org (union of all results)
27014whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
11124hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
7591whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5121webmail.rhs.mailpolice.com
3154hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2036hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
903adv.rhs.mailpolice.com
455hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
453urired.spameatingmonkey.net
336hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
267hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
138dbl.spamhaus.org
87hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
73rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
73rhsbl.sorbs.net (union of all results)
57postmaster.rfc-ignorant.org
47rhsbl.ahbl.org
43multi.uribl.com (result 127.0.0.2 = spam resource)
43bulk.rhs.mailpolice.com
43multi.uribl.com (union of all results)
35bogusmx.rfc-ignorant.org
34dsn.rfc-ignorant.org (zone not intended for this use)
27fresh.spameatingmonkey.net
23dob.sibl.support-intelligence.net
18multi.surbl.org
7porn.rhs.mailpolice.com
3bl.deadbeef.com
1hostkarma.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
77783(total number of domains tested, including 228 at SDSC)
73609hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16059(union of most domain zones)
8642hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7101whois.rfc-ignorant.org (union of all results)
6747whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5648hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4018abuse.rfc-ignorant.org
2817hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2630urired.spameatingmonkey.net
2274postmaster.rfc-ignorant.org
1537l1.apews.org
1399bogusmx.rfc-ignorant.org
1018hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
879webmail.rhs.mailpolice.com
769multi.uribl.com (union of all results)
764multi.surbl.org
757multi.uribl.com (result 127.0.0.2 = spam resource)
753dbl.spamhaus.org
603hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
543dsn.rfc-ignorant.org
354whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
298adv.rhs.mailpolice.com
205porn.rhs.mailpolice.com
104hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
73bulk.rhs.mailpolice.com
52fresh.spameatingmonkey.net
41hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
31rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
31rhsbl.sorbs.net (union of all results)
30dynamic.rhs.mailpolice.com
28hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
25rhsbl.ahbl.org
13ex.dnsbl.org
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
12hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
9dob.sibl.support-intelligence.net

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