Blacklists Compared

10 October 2009

[ 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
166990(total number of IP addresses tested, including 187 at SDSC)
163110(union of most IP zones)
150726b.barracudacentral.org
150675zen.spamhaus.org (union of all results)
142372l2.apews.org
118930cbl.abuseat.org
118873zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
111023hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
102784dnsbl-1.uceprotect.net
102659dnsbl-2.uceprotect.net
102511dnsbl-3.uceprotect.net
100432dnsbl.sorbs.net (union of all results)
98667zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
95235psbl.surriel.com
74565dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
66252ubl.unsubscore.com
55047hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
42914blackholes.five-ten-sg.com (union of all results)
40200no-more-funn.moensted.dk (union of all results)
39406blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
38627dnsbl.sorbs.net (result 127.0.0.10 = dialup)
35321db.wpbl.info
35241bl.spamcop.net
30329bl.spameatingmonkey.net
27190no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
23615zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
20090ix.dnsbl.manitu.net
18248spam.dnsbl.sorbs.net
14820mail-abuse.blacklist.jippg.org
11391dnsbl.inps.de
10408no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
9194bl.spamcannibal.org
8956korea.services.net
7785hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
4756spamsources.fabel.dk
3805list.dnswl.org (not a blacklist!)
3748ips.backscatterer.org
2821hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2689dnsbl.njabl.org (union of all results)
2675blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2485tr.countries.nerd.dk
2090dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1972hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1718hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1712no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1185zen.spamhaus.org (union of SBL and SBLCSS results)
907no-more-funn.moensted.dk (result 127.0.0.9 = misc)
822blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
774dnsbl.sorbs.net (result 127.0.0.6 = spam source)
663zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
616aspews.ext.sorbs.net
522zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
502accredit.habeas.com (not a blacklist!)
455dnsbl.njabl.org (result 127.0.0.4 = spam source)
399query.bondedsender.org (not a blacklist!)
392l2.bbfh.ext.sorbs.net
191dnsbl.ahbl.org (union of all results)
164iadb2.isipp.com (not a blacklist!)
163l1.bbfh.ext.sorbs.net
151dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
145dnsbl.njabl.org (result 127.0.0.2 = open relay)
118iadb.isipp.com (not a blacklist!)
111no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
104tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
104tor.dnsbl.sectoor.de (union of all results)
92hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
43dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
42bl.deadbeef.com
40dnsbl.ahbl.org (result 127.0.0.4 = spam source)
39dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
19zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
16multi.uribl.com (result 127.0.0.2 = spam resource)
16multi.uribl.com (union of all results)
10dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
10blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
9dnsbl-0.uceprotect.net
4multi.surbl.org
4dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
4hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4blackholes.brainerd.net
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (union of all results)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
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
166990(total number of IP addresses whose names were tested, including 187 at SDSC)
100566hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
90916hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
84004(union of most domain zones)
73944l1.apews.org
67690abuse.rfc-ignorant.org
33642dynamic.rhs.mailpolice.com
28231whois.rfc-ignorant.org (union of all results)
19365whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
10035hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
8866whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3908webmail.rhs.mailpolice.com
3014hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1008urired.spameatingmonkey.net
767adv.rhs.mailpolice.com
758hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
661hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
344hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
232hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
130rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
130rhsbl.sorbs.net (union of all results)
113hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
72postmaster.rfc-ignorant.org
64multi.uribl.com (result 127.0.0.2 = spam resource)
64multi.uribl.com (union of all results)
49bogusmx.rfc-ignorant.org
46dsn.rfc-ignorant.org (zone not intended for this use)
43bulk.rhs.mailpolice.com
41multi.surbl.org
30rhsbl.ahbl.org
24fresh.spameatingmonkey.net
24dob.sibl.support-intelligence.net
13hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
5bl.deadbeef.com
3porn.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
68539(total number of domains tested, including 169 at SDSC)
64281hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
18210(union of most domain zones)
9189hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7013whois.rfc-ignorant.org (union of all results)
6495whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5805hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
5170abuse.rfc-ignorant.org
3541urired.spameatingmonkey.net
3132l1.apews.org
2831hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2186hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1640multi.surbl.org
1551multi.uribl.com (union of all results)
1538multi.uribl.com (result 127.0.0.2 = spam resource)
1483postmaster.rfc-ignorant.org
1415bogusmx.rfc-ignorant.org
947webmail.rhs.mailpolice.com
789hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
565hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
524dynamic.rhs.mailpolice.com
518whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
468dsn.rfc-ignorant.org
322adv.rhs.mailpolice.com
207porn.rhs.mailpolice.com
84bulk.rhs.mailpolice.com
53hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
48hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
26hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
17rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
17rhsbl.sorbs.net (union of all results)
15ex.dnsbl.org
14fresh.spameatingmonkey.net
14rhsbl.ahbl.org
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8dob.sibl.support-intelligence.net
3fraud.rhs.mailpolice.com
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends 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 15 October 2009.