Blacklists Compared

4 May 2013

[ 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
80425(total number of IP addresses tested, including 150 at SDSC)
73665(union of most IP zones)
57949l2.apews.org
52691b.barracudacentral.org
50984zen.spamhaus.org (union of all results)
47279bl.tiopan.com
46089cbl.abuseat.org
46081zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
45509bl.mailspike.net (union of all results)
41479hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
38938bl.mailspike.net (result 127.0.0.12 = bad reputation)
37696dnsbl-1.uceprotect.net
36321spam.dnsbl.sorbs.net
34393zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
33175hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
31181psbl.surriel.com
27610db.wpbl.info
22773dnsbl-3.uceprotect.net
22649dnsbl-2.uceprotect.net
21902truncate.gbudb.net
21649all.spamrats.com (union of all results)
21618dnsbl.sorbs.net (union of all results)
21478dnsbl.inps.de
21294bl.spameatingmonkey.net
19477ubl.unsubscore.com
16137ips.backscatterer.org
13667all.spamrats.com (result 127.0.0.36 = dialup)
12685dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
11217dnsbl.sorbs.net (result 127.0.0.10 = dialup)
9463wl.mailspike.net (union of all results) (not a blacklist!)
8390list.dnswl.org (not a blacklist!)
7524all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
6063wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
5615zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5458bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
4486bl.mailspike.net (result 127.0.0.11 = very bad reputation)
4263hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
4041hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3814bl.spamcop.net
3667all.s5h.net
3336hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
3069bl.score.senderscore.com
3005wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2349ix.dnsbl.manitu.net
2108hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1987bl.spamcannibal.org
1591tr.countries.nerd.dk
1418bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
1103spamsources.fabel.dk
1034bl.mav.com.br
783accredit.habeas.com (not a blacklist!)
700mail-abuse.blacklist.jippg.org
636query.bondedsender.org (not a blacklist!)
585zen.spamhaus.org (union of SBL and SBLCSS results)
571free.v4bl.org
557korea.services.net
531all.spamrats.com (result 127.0.0.38 = spam source)
439hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
427zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
306wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
238iadb.isipp.com (not a blacklist!)
238l2.bbfh.ext.sorbs.net
168dnsbl.ahbl.org (union of all results)
158zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
118iadb2.isipp.com (not a blacklist!)
116dnsbl.ahbl.org (result 127.0.0.4 = spam source)
90wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
71tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
71tor.dnsbl.sectoor.de (union of all results)
57dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
57dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
57dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
36dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
15dnsbl.sorbs.net (result 127.0.0.6 = spam source)
15dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
11dnsbl-0.uceprotect.net
10dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
5multi.surbl.org
5hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5spamguard.leadmon.net (union of all results)
4spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3multi.uribl.com (result 127.0.0.2 = spam resource)
3multi.uribl.com (union of all results)
1wadb.isipp.com
1swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
1swl.spamhaus.org (union of all results) (not a blacklist!)
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
80425(total number of IP addresses whose names were tested, including 150 at SDSC)
51805hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
37119hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
20495l1.apews.org
6915hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3787hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2777(union of most domain zones)
1190hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
799hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
657dbl.spamhaus.org (union of all results)
655dbl.spamhaus.org (result 127.0.1.2 = spam source)
406hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
349hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
96hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
70multi.uribl.com (result 127.0.0.2 = spam resource)
70multi.surbl.org
70multi.uribl.com (union of all results)
65dob.sibl.support-intelligence.net
47fresh.spameatingmonkey.net
31urired.spameatingmonkey.net
21rhsbl.ahbl.org
19hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
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
54536(total number of domains tested, including 114 at SDSC)
48026hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
12489(union of most domain zones)
11624hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
4437hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2107hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2100hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1839dbl.spamhaus.org (union of all results)
1833dbl.spamhaus.org (result 127.0.1.2 = spam source)
1485hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1304multi.uribl.com (union of all results)
1290multi.uribl.com (result 127.0.0.2 = spam resource)
1208multi.surbl.org
763l1.apews.org
427dob.sibl.support-intelligence.net
265hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
149fresh.spameatingmonkey.net
32urired.spameatingmonkey.net
23hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
17rhsbl.ahbl.org
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
11hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
6dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
5ex.dnsbl.org
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 6 May 2013.