Blacklists Compared

2 January 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
165269(total number of IP addresses tested, including 165 at SDSC)
162735(union of most IP zones)
156409b.barracudacentral.org
153657zen.spamhaus.org (union of all results)
141106l2.apews.org
127390cbl.abuseat.org
127262zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
118760dnsbl-1.uceprotect.net
113550hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
108990dnsbl-2.uceprotect.net
108222dnsbl-3.uceprotect.net
107399psbl.surriel.com
101987dnsbl.sorbs.net (union of all results)
96067zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
73988ubl.unsubscore.com
72963dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
70732hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
44195blackholes.five-ten-sg.com (union of all results)
41035blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
40896dnsbl.sorbs.net (result 127.0.0.10 = dialup)
36340bl.spamcop.net
35284bl.score.senderscore.com
34684bl.spameatingmonkey.net
29589db.wpbl.info
29575no-more-funn.moensted.dk (union of all results)
27182zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
25180ix.dnsbl.manitu.net
18436no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
17358mail-abuse.blacklist.jippg.org
12672spam.dnsbl.sorbs.net
11158hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
10075korea.services.net
8066dnsbl.inps.de
6668no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
5977bl.spamcannibal.org
4171spamsources.fabel.dk
3415list.dnswl.org (not a blacklist!)
3290no-more-funn.moensted.dk (result 127.0.0.9 = misc)
2910tr.countries.nerd.dk
2201blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2066hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1795dnsbl.njabl.org (union of all results)
1782ips.backscatterer.org
1558dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1388hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1224no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1069hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
942blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
447accredit.habeas.com (not a blacklist!)
417zen.spamhaus.org (union of SBL and SBLCSS results)
399aspews.ext.sorbs.net
370query.bondedsender.org (not a blacklist!)
338zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
236l2.bbfh.ext.sorbs.net
191dnsbl.sorbs.net (result 127.0.0.6 = spam source)
135dnsbl.njabl.org (result 127.0.0.2 = open relay)
119iadb2.isipp.com (not a blacklist!)
117tor.dnsbl.sectoor.de (union of all results)
116tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
102dnsbl.njabl.org (result 127.0.0.4 = spam source)
98dnsbl.ahbl.org (union of all results)
97l1.bbfh.ext.sorbs.net
95iadb.isipp.com (not a blacklist!)
79zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
79dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
53hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
39dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
34dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
31no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
31bl.deadbeef.com
18dnsbl.ahbl.org (result 127.0.0.4 = spam source)
15blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
13dnsbl-0.uceprotect.net
10zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
9multi.uribl.com (union of all results)
8multi.uribl.com (result 127.0.0.2 = spam resource)
7multi.surbl.org
5spamguard.leadmon.net (union of all results)
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2blackholes.brainerd.net
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)

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
165269(total number of IP addresses whose names were tested, including 165 at SDSC)
102088hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
91307hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
85171(union of most domain zones)
74163l1.apews.org
67925abuse.rfc-ignorant.org
30288dynamic.rhs.mailpolice.com
28861whois.rfc-ignorant.org (union of all results)
20720whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
9719hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
8141whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3601webmail.rhs.mailpolice.com
2632hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
2218hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
696adv.rhs.mailpolice.com
298hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
265urired.spameatingmonkey.net
236hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
101hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
64hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
61rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
61rhsbl.sorbs.net (union of all results)
41postmaster.rfc-ignorant.org
40bulk.rhs.mailpolice.com
33rhsbl.ahbl.org
24dsn.rfc-ignorant.org (zone not intended for this use)
18bogusmx.rfc-ignorant.org
16multi.surbl.org
11multi.uribl.com (result 127.0.0.2 = spam resource)
11multi.uribl.com (union of all results)
10porn.rhs.mailpolice.com
9dob.sibl.support-intelligence.net
8fresh.spameatingmonkey.net
5bl.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
47623(total number of domains tested, including 168 at SDSC)
45789hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
11029(union of most domain zones)
5618hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3643whois.rfc-ignorant.org (union of all results)
3457hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3389whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2887urired.spameatingmonkey.net
2646abuse.rfc-ignorant.org
1743hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1708postmaster.rfc-ignorant.org
1121l1.apews.org
1069hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
968bogusmx.rfc-ignorant.org
896multi.surbl.org
736multi.uribl.com (union of all results)
727multi.uribl.com (result 127.0.0.2 = spam resource)
692webmail.rhs.mailpolice.com
441dsn.rfc-ignorant.org
424hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
254whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
229adv.rhs.mailpolice.com
159porn.rhs.mailpolice.com
83hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
55bulk.rhs.mailpolice.com
30hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
23rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
23rhsbl.sorbs.net (union of all results)
20hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
14dynamic.rhs.mailpolice.com
13ex.dnsbl.org
11rhsbl.ahbl.org
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
6hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2fresh.spameatingmonkey.net
2dob.sibl.support-intelligence.net
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1bl.deadbeef.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 7 January 2010.