Blacklists Compared

25 August 2012

[ 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
47512(total number of IP addresses tested, including 174 at SDSC)
43937(union of most IP zones)
35462l2.apews.org
34955b.barracudacentral.org
34886zen.spamhaus.org (union of all results)
34116ip.v4bl.org
33440zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
33438cbl.abuseat.org
30642bl.tiopan.com
27063bl.mailspike.net (union of all results)
26154hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
23524hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
22883zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
22523bl.mailspike.net (result 127.0.0.12 = bad reputation)
20897dnsbl-1.uceprotect.net
16604dnsbl-3.uceprotect.net
16210all.spamrats.com (union of all results)
15952dnsbl-2.uceprotect.net
14382bl.spameatingmonkey.net
12181psbl.surriel.com
12135dnsbl.sorbs.net (union of all results)
11231ubl.unsubscore.com
11001spam.dnsbl.sorbs.net
9669wl.mailspike.net (union of all results) (not a blacklist!)
8880all.spamrats.com (result 127.0.0.36 = dialup)
7749truncate.gbudb.net
7057all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
6944dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6838dnsbl.inps.de
6194list.dnswl.org (not a blacklist!)
6006wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
5675dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
4651db.wpbl.info
3973zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3881all.s5h.net
3620bl.mailspike.net (result 127.0.0.11 = very bad reputation)
3598bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
3362bl.spamcop.net
3037hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2714wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2667bl.score.senderscore.com
2522hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2112ix.dnsbl.manitu.net
1890ips.backscatterer.org
1818hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1443hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1147zen.spamhaus.org (union of SBL and SBLCSS results)
1033bl.spamcannibal.org
979mail-abuse.blacklist.jippg.org
857tr.countries.nerd.dk
754accredit.habeas.com (not a blacklist!)
742korea.services.net
718spamsources.fabel.dk
690zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
633wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
617query.bondedsender.org (not a blacklist!)
457zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
379bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
355all.spamrats.com (result 127.0.0.38 = spam source)
321wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
303l2.bbfh.ext.sorbs.net
299dnsbl.njabl.org (union of all results)
263aspews.ext.sorbs.net
244dnsbl.njabl.org (result 127.0.0.9 = open proxy)
222iadb.isipp.com (not a blacklist!)
191dnsbl.ahbl.org (union of all results)
161hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
138dnsbl.ahbl.org (result 127.0.0.4 = spam source)
105dnsbl.sorbs.net (result 127.0.0.6 = spam source)
70iadb2.isipp.com (not a blacklist!)
57tor.dnsbl.sectoor.de (union of all results)
56tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
47dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
47dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
47dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
32dnsbl.njabl.org (result 127.0.0.2 = open relay)
28dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
25dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
23dnsbl.njabl.org (result 127.0.0.4 = spam source)
13hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5multi.surbl.org
5spamguard.leadmon.net (union of all results)
4dnsbl-0.uceprotect.net
4swl.spamhaus.org (union of all results) (not a blacklist!)
3swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
3spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
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
47512(total number of IP addresses whose names were tested, including 174 at SDSC)
26172hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
22091hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16686(union of most domain zones)
13871abuse.rfc-ignorant.org
11650l1.apews.org
6521whois.rfc-ignorant.org (union of all results)
5444whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2991hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2787hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1077whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
566dbl.spamhaus.org (result 127.0.1.2 = spam source)
566dbl.spamhaus.org (union of all results)
493hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
376hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
251hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
211hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
100urired.spameatingmonkey.net
65bogusmx.rfc-ignorant.org
53hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
49fresh.spameatingmonkey.net
38dob.sibl.support-intelligence.net
28postmaster.rfc-ignorant.org
27multi.uribl.com (result 127.0.0.2 = spam resource)
27multi.uribl.com (union of all results)
23multi.surbl.org
16rhsbl.ahbl.org
4hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2dsn.rfc-ignorant.org (zone not intended for this use)
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
35487(total number of domains tested, including 120 at SDSC)
32095hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
8078(union of most domain zones)
3602hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2925whois.rfc-ignorant.org (union of all results)
2784whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2729hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2426dbl.spamhaus.org (union of all results)
2425dbl.spamhaus.org (result 127.0.1.2 = spam source)
2036hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1902hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1600multi.surbl.org
1444abuse.rfc-ignorant.org
1267hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1191multi.uribl.com (union of all results)
1174multi.uribl.com (result 127.0.0.2 = spam resource)
712postmaster.rfc-ignorant.org
536bogusmx.rfc-ignorant.org
490l1.apews.org
420urired.spameatingmonkey.net
277hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
271dob.sibl.support-intelligence.net
239fresh.spameatingmonkey.net
194dsn.rfc-ignorant.org
141whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
22hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
20hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
15rhsbl.ahbl.org
14multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
6ex.dnsbl.org
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 27 August 2012.