Blacklists Compared

16 August 2008

[ 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 (127.0.0.1 result), 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
166221(total number of IP addresses tested, including 465 at SDSC)
159585(union of most IP zones)
141159zen.spamhaus.org (union of all results)
137196l2.apews.org
125341t1.dnsbl.net.au
101172cbl.abuseat.org
101114zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
85902zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
84583dnsbl-3.uceprotect.net
81129dnsbl-1.uceprotect.net
80098psbl.surriel.com
77838dnsbl-2.uceprotect.net
67883dnsbl.sorbs.net (union of all results)
64164hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
49809dnsbl.sorbs.net (result 127.0.0.10 = dialup)
49256no-more-funn.moensted.dk (union of all results)
44960blackholes.five-ten-sg.com (union of all results)
43536ubl.unsubscore.com
40592blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
36844no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
33731bl.spamcop.net
33012db.wpbl.info
31660ix.dnsbl.manitu.net
22636zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
17892dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
11276no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
10969sbl.csma.biz
10916spam.dnsbl.sorbs.net
10579bl.spamcannibal.org
9983bl.csma.biz
8585tr.countries.nerd.dk
8561dnsbl.inps.de
8379countries.blackholes.us (result 127.6.4.3 = Russia)
8042countries.blackholes.us (result 127.1.5.6 = China)
8041countries.blackholes.us (result 127.0.7.6 = Brazil)
7340hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
7338mail-abuse.blacklist.jippg.org
6405countries.blackholes.us (result 127.7.9.2 = Turkey)
5381ips.backscatterer.org
4798korea.services.net
4482spamsources.fabel.dk
4169list.dnswl.org (not a blacklist!)
3889countries.blackholes.us (result 127.0.3.2 = Argentina)
3870dnsbl.njabl.org (union of all results)
3867countries.blackholes.us (result 127.4.1.0 = Korea)
3316blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
3154dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2676rmst.dnsbl.net.au
2644countries.blackholes.us (result 127.7.6.4 = Thailand)
2590hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2125dnsbl.ahbl.org (union of all results)
1845dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1568countries.blackholes.us (result 127.4.8.4 = Mexico)
1137countries.blackholes.us (result 127.3.9.2 = Japan)
1006blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
926countries.blackholes.us (result 127.1.5.8 = Taiwan)
879aspews.ext.sorbs.net
698no-more-funn.moensted.dk (result 127.0.0.9 = misc)
551zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
537dnsbl.njabl.org (result 127.0.0.4 = spam source)
464zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
374countries.blackholes.us (result 127.7.0.2 = Singapore)
343countries.blackholes.us (result 127.3.4.4 = Hong Kong)
283query.bondedsender.org (not a blacklist!)
270hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
264no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
257countries.blackholes.us (result 127.4.5.8 = Malaysia)
239no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
238probes.dnsbl.net.au
221dnsbl.sorbs.net (result 127.0.0.6 = spam source)
207dnsbl.ahbl.org (result 127.0.0.4 = spam source)
200accredit.habeas.com (not a blacklist!)
180iadb2.isipp.com (not a blacklist!)
179dnsbl.njabl.org (result 127.0.0.2 = open relay)
150bl.deadbeef.com
134iadb.isipp.com (not a blacklist!)
119tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
119tor.dnsbl.sectoor.de (union of all results)
79dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
78dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
75multi.surbl.org
36dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
33exemptions.ahbl.org (not a blacklist!)
29blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
27countries.blackholes.us (result 127.5.6.6 = Nigeria)
21dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
15rdts.dnsbl.net.au
15blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
14dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
13dnsbl.ahbl.org (result 127.0.0.15 = open relay)
11spamguard.leadmon.net (union of all results)
8spam.wytnij.to
8dnsbl.sorbs.net (result 127.0.0.5 = open relay)
7spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
5blackholes.brainerd.net
4dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1ohps.dnsbl.net.au
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)
1dob.sibl.support-intelligence.net
1multi.uribl.com (union of all results)


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses.

HitsDNS Zone
166221(total number of IP addresses whose names were tested, including 465 at SDSC)
96435(union of all domain zones)
77430l1.apews.org
67723abuse.rfc-ignorant.org
53964rddn.dnsbl.net.au
36063whois.rfc-ignorant.org (union of all results)
34241dynamic.rhs.mailpolice.com
24403whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
11660whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
7378webmail.rhs.mailpolice.com
576adv.rhs.mailpolice.com
450bl.deadbeef.com
319multi.surbl.org
251multi.uribl.com (union of all results)
249multi.uribl.com (result 127.0.0.2 = spam resource)
176bulk.rhs.mailpolice.com
91postmaster.rfc-ignorant.org
81rhsbl.ahbl.org
72bogusmx.rfc-ignorant.org
68dsn.rfc-ignorant.org (zone not intended for this use)
46rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
46rhsbl.sorbs.net (union of all results)
21dob.sibl.support-intelligence.net
8porn.rhs.mailpolice.com
2multi.uribl.com (result 127.0.0.4 = opt-out spam resource)


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains.

HitsDNS Zone
144158(total number of domains tested, including 414 at SDSC)
28666(union of all domain zones)
14346whois.rfc-ignorant.org (union of all results)
13642whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6297bogusmx.rfc-ignorant.org
4509abuse.rfc-ignorant.org
2769postmaster.rfc-ignorant.org
1599multi.surbl.org
1429multi.uribl.com (union of all results)
1374multi.uribl.com (result 127.0.0.2 = spam resource)
1142webmail.rhs.mailpolice.com
1010l1.apews.org
919dsn.rfc-ignorant.org
704whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
523porn.rhs.mailpolice.com
287adv.rhs.mailpolice.com
177rhsbl.ahbl.org
158bulk.rhs.mailpolice.com
126rddn.dnsbl.net.au (zone not intended for this use)
119dynamic.rhs.mailpolice.com
96dob.sibl.support-intelligence.net
55multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
34rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
34rhsbl.sorbs.net (union of all results)
19ex.dnsbl.org
4fraud.rhs.mailpolice.com
3bl.deadbeef.com
1cart00ney.surriel.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 22 August 2008.