Blacklists Compared

24 January 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 (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
68462(total number of IP addresses tested, including 205 at SDSC)
64278(union of most IP zones)
53279zen.spamhaus.org (union of all results)
52619l2.apews.org
46977t1.dnsbl.net.au
44965b.barracudacentral.org
41674cbl.abuseat.org
41616zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
33556zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
30270dnsbl-3.uceprotect.net
29354dnsbl-1.uceprotect.net
28295dnsbl-2.uceprotect.net
26839hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
21865ubl.unsubscore.com
21651psbl.surriel.com
21534dnsbl.sorbs.net (union of all results)
19962blackholes.five-ten-sg.com (union of all results)
19289no-more-funn.moensted.dk (union of all results)
16967blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
13794dnsbl.sorbs.net (result 127.0.0.10 = dialup)
12302db.wpbl.info
10900bl.spamcop.net
10186no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
7807no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
7771zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
7720ix.dnsbl.manitu.net
7620dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
7241spam.dnsbl.sorbs.net
4311countries.blackholes.us (result 127.1.5.6 = China)
4209bl.spamcannibal.org
3958korea.services.net
3651dnsbl.inps.de
3647list.dnswl.org (not a blacklist!)
3006countries.blackholes.us (result 127.0.7.6 = Brazil)
2928tr.countries.nerd.dk
2653hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2450hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2326spamsources.fabel.dk
2260countries.blackholes.us (result 127.4.1.0 = Korea)
1909blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
1877ips.backscatterer.org
1485countries.blackholes.us (result 127.6.4.3 = Russia)
1410mail-abuse.blacklist.jippg.org
1287dnsbl.njabl.org (union of all results)
1221countries.blackholes.us (result 127.7.9.2 = Turkey)
1111no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1050blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1015dnsbl.njabl.org (result 127.0.0.9 = open proxy)
898rmst.dnsbl.net.au
856aspews.ext.sorbs.net
616countries.blackholes.us (result 127.0.3.2 = Argentina)
508countries.blackholes.us (result 127.7.6.4 = Thailand)
392countries.blackholes.us (result 127.1.5.8 = Taiwan)
381countries.blackholes.us (result 127.3.9.2 = Japan)
350query.bondedsender.org (not a blacklist!)
321zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
321countries.blackholes.us (result 127.4.8.4 = Mexico)
239dnsbl.njabl.org (result 127.0.0.4 = spam source)
217dnsbl.sorbs.net (result 127.0.0.6 = spam source)
205accredit.habeas.com (not a blacklist!)
185hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
169countries.blackholes.us (result 127.3.4.4 = Hong Kong)
164no-more-funn.moensted.dk (result 127.0.0.9 = misc)
159iadb2.isipp.com (not a blacklist!)
123iadb.isipp.com (not a blacklist!)
112dnsbl.ahbl.org (union of all results)
107zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
104countries.blackholes.us (result 127.7.0.2 = Singapore)
78dnsbl.ahbl.org (result 127.0.0.4 = spam source)
70no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
69countries.blackholes.us (result 127.4.5.8 = Malaysia)
57bl.deadbeef.com
50l2.bbfh.ext.sorbs.net
40probes.dnsbl.net.au
39tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
39tor.dnsbl.sectoor.de (union of all results)
34dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
33dnsbl.njabl.org (result 127.0.0.2 = open relay)
26dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
26dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
21blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
14multi.surbl.org
14blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
10dnsbl-0.uceprotect.net
6countries.blackholes.us (result 127.5.6.6 = Nigeria)
5spamguard.leadmon.net (union of all results)
4multi.uribl.com (result 127.0.0.2 = spam resource)
4blackholes.brainerd.net
4multi.uribl.com (union of all results)
3dnsbl.sorbs.net (result 127.0.0.5 = open relay)
3dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
3rdts.dnsbl.net.au
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
1spamguard.leadmon.net (result 127.0.0.8 = open proxy)
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)
1dob.sibl.support-intelligence.net


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

HitsDNS Zone
68462(total number of IP addresses whose names were tested, including 205 at SDSC)
32476(union of all domain zones)
24848l1.apews.org
23191abuse.rfc-ignorant.org
15995rddn.dnsbl.net.au
12103whois.rfc-ignorant.org (union of all results)
10953dynamic.rhs.mailpolice.com
7225whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4878whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
2040webmail.rhs.mailpolice.com
700adv.rhs.mailpolice.com
479rhsbl.ahbl.org
268multi.surbl.org
233multi.uribl.com (union of all results)
232multi.uribl.com (result 127.0.0.2 = spam resource)
54postmaster.rfc-ignorant.org
47dsn.rfc-ignorant.org (zone not intended for this use)
47bogusmx.rfc-ignorant.org
39bulk.rhs.mailpolice.com
12rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
12rhsbl.sorbs.net (union of all results)
8bl.deadbeef.com
7dob.sibl.support-intelligence.net
5porn.rhs.mailpolice.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)


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

HitsDNS Zone
42478(total number of domains tested, including 188 at SDSC)
11726(union of all domain zones)
3814whois.rfc-ignorant.org (union of all results)
3498bogusmx.rfc-ignorant.org
3381whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2739postmaster.rfc-ignorant.org
2185abuse.rfc-ignorant.org
1074multi.surbl.org
1054l1.apews.org
970multi.uribl.com (union of all results)
942multi.uribl.com (result 127.0.0.2 = spam resource)
829webmail.rhs.mailpolice.com
433whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
423dsn.rfc-ignorant.org
276adv.rhs.mailpolice.com
153porn.rhs.mailpolice.com
99rhsbl.ahbl.org
98bulk.rhs.mailpolice.com
34rddn.dnsbl.net.au (zone not intended for this use)
33rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
33rhsbl.sorbs.net (union of all results)
27multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
16dob.sibl.support-intelligence.net
14dynamic.rhs.mailpolice.com
14ex.dnsbl.org
2fraud.rhs.mailpolice.com
2bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 29 January 2009.