Blacklists Compared

7 November 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
162658(total number of IP addresses tested, including 235 at SDSC)
158572(union of most IP zones)
139985b.barracudacentral.org
137794zen.spamhaus.org (union of all results)
132040l2.apews.org
110873cbl.abuseat.org
110825zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
102903hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
101714dnsbl-1.uceprotect.net
96407dnsbl-3.uceprotect.net
96274dnsbl.sorbs.net (union of all results)
95608dnsbl-2.uceprotect.net
88063zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
84535psbl.surriel.com
72035dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
67786ubl.unsubscore.com
52811bl.spameatingmonkey.net
49872hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
37572no-more-funn.moensted.dk (union of all results)
36993db.wpbl.info
36512dnsbl.sorbs.net (result 127.0.0.10 = dialup)
35544blackholes.five-ten-sg.com (union of all results)
34563bl.score.senderscore.com
33959bl.spamcop.net
32648blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
24449no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
21661zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
18717spam.dnsbl.sorbs.net
17555ix.dnsbl.manitu.net
15592hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
14041ips.backscatterer.org
12744mail-abuse.blacklist.jippg.org
10344no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
10001dnsbl.inps.de
9167bl.spamcannibal.org
9143korea.services.net
4531spamsources.fabel.dk
4235list.dnswl.org (not a blacklist!)
3500hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3103hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2233hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2073dnsbl.njabl.org (union of all results)
2045blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
1684no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1600dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1285tr.countries.nerd.dk
965no-more-funn.moensted.dk (result 127.0.0.9 = misc)
939zen.spamhaus.org (union of SBL and SBLCSS results)
834blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
638aspews.ext.sorbs.net
553zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
527dnsbl.sorbs.net (result 127.0.0.6 = spam source)
523accredit.habeas.com (not a blacklist!)
518l2.bbfh.ext.sorbs.net
424query.bondedsender.org (not a blacklist!)
386zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
298dnsbl.njabl.org (result 127.0.0.4 = spam source)
213no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
200l1.bbfh.ext.sorbs.net
174dnsbl.njabl.org (result 127.0.0.2 = open relay)
166dnsbl.ahbl.org (union of all results)
157iadb2.isipp.com (not a blacklist!)
132dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
117iadb.isipp.com (not a blacklist!)
102hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
92tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
92tor.dnsbl.sectoor.de (union of all results)
45bl.deadbeef.com
38dnsbl-0.uceprotect.net
36multi.uribl.com (result 127.0.0.2 = spam resource)
36multi.uribl.com (union of all results)
33dnsbl.ahbl.org (result 127.0.0.4 = spam source)
29dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
26dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
14blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
10hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
8blackholes.brainerd.net
7zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4multi.surbl.org
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
2blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
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)
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
162658(total number of IP addresses whose names were tested, including 235 at SDSC)
100441hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
88962hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
78765(union of most domain zones)
68124l1.apews.org
63005abuse.rfc-ignorant.org
29416dynamic.rhs.mailpolice.com
25806whois.rfc-ignorant.org (union of all results)
19217whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
11095hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
6589whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3706webmail.rhs.mailpolice.com
3335hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
939adv.rhs.mailpolice.com
861hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
679hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
585urired.spameatingmonkey.net
371hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
341hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
319hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
299bl.deadbeef.com
127rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
127rhsbl.sorbs.net (union of all results)
86fresh.spameatingmonkey.net
86postmaster.rfc-ignorant.org
66dob.sibl.support-intelligence.net
60multi.surbl.org
54multi.uribl.com (union of all results)
53multi.uribl.com (result 127.0.0.2 = spam resource)
40dsn.rfc-ignorant.org (zone not intended for this use)
40bogusmx.rfc-ignorant.org
36bulk.rhs.mailpolice.com
33rhsbl.ahbl.org
19hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
10porn.rhs.mailpolice.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1ex.dnsbl.org

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
62066(total number of domains tested, including 225 at SDSC)
57695hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16701(union of most domain zones)
8322hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6954whois.rfc-ignorant.org (union of all results)
6501whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6014hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3941abuse.rfc-ignorant.org
3362urired.spameatingmonkey.net
2982hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2244l1.apews.org
1571postmaster.rfc-ignorant.org
1429hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1267bogusmx.rfc-ignorant.org
1098multi.surbl.org
999multi.uribl.com (union of all results)
986multi.uribl.com (result 127.0.0.2 = spam resource)
914webmail.rhs.mailpolice.com
707hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
568hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
507dsn.rfc-ignorant.org
453whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
335adv.rhs.mailpolice.com
275dynamic.rhs.mailpolice.com
193porn.rhs.mailpolice.com
111hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
89bulk.rhs.mailpolice.com
41hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
30hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
26rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
26rhsbl.sorbs.net (union of all results)
19rhsbl.ahbl.org
16fresh.spameatingmonkey.net
15ex.dnsbl.org
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
7dob.sibl.support-intelligence.net
3fraud.rhs.mailpolice.com
3bl.deadbeef.com
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
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 12 November 2009.