Blacklists Compared

15 January 2011

[ 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, iadb2.isipp.com, swl.spamhaus.org, and wl.mailspike.net zones because they are not blacklists. Because they are too aggressive to be widely useful the spam.dnsbl.sorbs.net and l2.apews.org zones are also excluded from the union.

HitsDNS Zone
74172(total number of IP addresses tested, including 174 at SDSC)
70862(union of most IP zones)
62007b.barracudacentral.org
61156zen.spamhaus.org (union of all results)
60435l2.apews.org
59146zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
59146cbl.abuseat.org
48224hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
46734bl.mailspike.net (union of all results)
45585dnsbl-1.uceprotect.net
45145bl.tiopan.com
39988psbl.surriel.com
38393zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
37610bl.spameatingmonkey.net
36623dnsbl-2.uceprotect.net
35865dnsbl-3.uceprotect.net
34090ubl.unsubscore.com
33050hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
26785bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
24528spam.dnsbl.sorbs.net
24207blackholes.five-ten-sg.com (union of all results)
21171bl.mailspike.net (result 127.0.0.11 = very bad reputation)
20990bl.score.senderscore.com
18859db.wpbl.info
14954dnsbl.sorbs.net (union of all results)
14869bl.spamcop.net
14197blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
11807dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10972bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
9919bl.mailspike.net (result 127.0.0.12 = bad reputation)
8823ix.dnsbl.manitu.net
8680blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
8644zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
8398dnsbl.inps.de
7971no-more-funn.moensted.dk (union of all results)
6858mail-abuse.blacklist.jippg.org
5419no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
5208list.dnswl.org (not a blacklist!)
3821wl.mailspike.net (union of all results) (not a blacklist!)
3785ips.backscatterer.org
3473hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3351wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
3341hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2801dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
2368no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2098hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1778bl.spamcannibal.org
1456spamsources.fabel.dk
1305blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1257korea.services.net
1015hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
808l2.bbfh.ext.sorbs.net
720dnsbl.njabl.org (union of all results)
592accredit.habeas.com (not a blacklist!)
560dnsbl.njabl.org (result 127.0.0.9 = open proxy)
533tr.countries.nerd.dk
514query.bondedsender.org (not a blacklist!)
456wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
439dnsbl.sorbs.net (result 127.0.0.6 = spam source)
371aspews.ext.sorbs.net
356l1.bbfh.ext.sorbs.net
289dnsbl.ahbl.org (union of all results)
250zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
250zen.spamhaus.org (union of SBL and SBLCSS results)
216dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
126dnsbl.njabl.org (result 127.0.0.2 = open relay)
118iadb2.isipp.com (not a blacklist!)
103hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
100dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
100dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
100dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
94iadb.isipp.com (not a blacklist!)
90no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
68no-more-funn.moensted.dk (result 127.0.0.9 = misc)
60no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
55tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
55tor.dnsbl.sectoor.de (union of all results)
51dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
34dnsbl.njabl.org (result 127.0.0.4 = spam source)
25blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
23swl.spamhaus.org (union of all results) (not a blacklist!)
22dnsbl.ahbl.org (result 127.0.0.4 = spam source)
15hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
15bl.deadbeef.com
14zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
14wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
13swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
11multi.surbl.org
10swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
3dnsbl-0.uceprotect.net
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (union of all results)
1multi.uribl.com (result 127.0.0.2 = spam resource)
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. 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
74172(total number of IP addresses whose names were tested, including 174 at SDSC)
46430hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
39907hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
33345(union of most domain zones)
28998abuse.rfc-ignorant.org
27868l1.apews.org
10232whois.rfc-ignorant.org (union of all results)
6840whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4310hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3804hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3392whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1168hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
539hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
308hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
240urired.spameatingmonkey.net
159dbl.spamhaus.org
135hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
58postmaster.rfc-ignorant.org
44hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
37dsn.rfc-ignorant.org (zone not intended for this use)
32bogusmx.rfc-ignorant.org
20fresh.spameatingmonkey.net
18rhsbl.ahbl.org
15multi.surbl.org
15dob.sibl.support-intelligence.net
7multi.uribl.com (result 127.0.0.2 = spam resource)
7multi.uribl.com (union of all results)
5hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2bl.deadbeef.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
29773(total number of domains tested, including 140 at SDSC)
25996hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
8039(union of most domain zones)
5537hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3581whois.rfc-ignorant.org (union of all results)
3365whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3024hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2916hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2624abuse.rfc-ignorant.org
1419postmaster.rfc-ignorant.org
1026l1.apews.org
811urired.spameatingmonkey.net
637hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
573dbl.spamhaus.org
562bogusmx.rfc-ignorant.org
444multi.surbl.org
442hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
403hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
368multi.uribl.com (union of all results)
362dsn.rfc-ignorant.org
357multi.uribl.com (result 127.0.0.2 = spam resource)
216whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
44dob.sibl.support-intelligence.net
34fresh.spameatingmonkey.net
17hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
14rhsbl.ahbl.org
11hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8ex.dnsbl.org
2bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 20 January 2011.