Blacklists Compared

22 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
72767(total number of IP addresses tested, including 189 at SDSC)
69539(union of most IP zones)
61238b.barracudacentral.org
59967zen.spamhaus.org (union of all results)
58599l2.apews.org
58523zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
58523cbl.abuseat.org
48185hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
44495dnsbl-1.uceprotect.net
44072bl.mailspike.net (union of all results)
40216psbl.surriel.com
38437bl.spameatingmonkey.net
36291bl.tiopan.com
36002zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
34710dnsbl-2.uceprotect.net
34458ubl.unsubscore.com
34164dnsbl-3.uceprotect.net
33418hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
22705blackholes.five-ten-sg.com (union of all results)
22587spam.dnsbl.sorbs.net
22546bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
20737bl.score.senderscore.com
19688bl.mailspike.net (result 127.0.0.11 = very bad reputation)
19535db.wpbl.info
16802bl.spamcop.net
15077dnsbl.sorbs.net (union of all results)
13618bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
13166blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
12160dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10351ix.dnsbl.manitu.net
9229dnsbl.inps.de
9051zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
8206blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
7722no-more-funn.moensted.dk (union of all results)
7639mail-abuse.blacklist.jippg.org
7233bl.mailspike.net (result 127.0.0.12 = bad reputation)
5496no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
5238ips.backscatterer.org
5127list.dnswl.org (not a blacklist!)
4542hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3314wl.mailspike.net (union of all results) (not a blacklist!)
3258hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2909dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
2548wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2176hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2022no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1659bl.spamcannibal.org
1361spamsources.fabel.dk
1307blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1186korea.services.net
1010hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
977l2.bbfh.ext.sorbs.net
751wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
723dnsbl.njabl.org (union of all results)
613tr.countries.nerd.dk
576accredit.habeas.com (not a blacklist!)
564dnsbl.njabl.org (result 127.0.0.9 = open proxy)
498query.bondedsender.org (not a blacklist!)
420aspews.ext.sorbs.net
357l1.bbfh.ext.sorbs.net
294dnsbl.ahbl.org (union of all results)
238zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
238zen.spamhaus.org (union of SBL and SBLCSS results)
218dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
148iadb2.isipp.com (not a blacklist!)
122iadb.isipp.com (not a blacklist!)
114dnsbl.njabl.org (result 127.0.0.2 = open relay)
106no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
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)
98hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
78no-more-funn.moensted.dk (result 127.0.0.9 = misc)
56tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
56no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
56tor.dnsbl.sectoor.de (union of all results)
49dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
45dnsbl.njabl.org (result 127.0.0.4 = spam source)
27dnsbl.ahbl.org (result 127.0.0.4 = spam source)
26blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
20swl.spamhaus.org (union of all results) (not a blacklist!)
17zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
16bl.deadbeef.com
15wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
13hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
12swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
12multi.surbl.org
8swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
6spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
6spamguard.leadmon.net (union of all results)
5dnsbl-0.uceprotect.net
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
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
72767(total number of IP addresses whose names were tested, including 189 at SDSC)
46881hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
40190hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
33589(union of most domain zones)
28942abuse.rfc-ignorant.org
28042l1.apews.org
9799whois.rfc-ignorant.org (union of all results)
6589whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4568hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3712hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3211whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1205hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
909hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
383dbl.spamhaus.org
335hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
220urired.spameatingmonkey.net
219hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
90hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
56postmaster.rfc-ignorant.org
38dsn.rfc-ignorant.org (zone not intended for this use)
31bogusmx.rfc-ignorant.org
19rhsbl.ahbl.org
17fresh.spameatingmonkey.net
16multi.uribl.com (result 127.0.0.2 = spam resource)
16multi.uribl.com (union of all results)
14dob.sibl.support-intelligence.net
13multi.surbl.org
12hostkarma.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
25831(total number of domains tested, including 174 at SDSC)
23058hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7284(union of most domain zones)
5341hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3019whois.rfc-ignorant.org (union of all results)
2831whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2708hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2568hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2444abuse.rfc-ignorant.org
1387postmaster.rfc-ignorant.org
1025l1.apews.org
888hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
824urired.spameatingmonkey.net
761dbl.spamhaus.org
684multi.surbl.org
513multi.uribl.com (union of all results)
502multi.uribl.com (result 127.0.0.2 = spam resource)
483hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
407bogusmx.rfc-ignorant.org
402hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
278dsn.rfc-ignorant.org
188whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
78dob.sibl.support-intelligence.net
34fresh.spameatingmonkey.net
20hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
16rhsbl.ahbl.org
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10ex.dnsbl.org
9hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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 26 January 2011.