Blacklists Compared

12 October 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
80999(total number of IP addresses tested, including 153 at SDSC)
75949(union of most IP zones)
66958zen.spamhaus.org (union of all results)
66595b.barracudacentral.org
65930l2.apews.org
62150cbl.abuseat.org
62146zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
57659bl.tiopan.com
50091hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
47812dnsbl-1.uceprotect.net
44179bl.mailspike.net (union of all results)
43857hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
42853zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
39914psbl.surriel.com
35645db.wpbl.info
34431spam.dnsbl.sorbs.net
30642ubl.unsubscore.com
28011bl.spameatingmonkey.net
27553dnsbl.sorbs.net (union of all results)
26630all.spamrats.com (union of all results)
25448dnsbl.inps.de
24918dnsbl-2.uceprotect.net
23990bl.mailspike.net (result 127.0.0.12 = bad reputation)
21552dnsbl-3.uceprotect.net
19827truncate.gbudb.net
18157all.spamrats.com (result 127.0.0.36 = dialup)
15882dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
14093dnsbl.sorbs.net (result 127.0.0.10 = dialup)
12029bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
11870ips.backscatterer.org
9883bl.spamcop.net
8193all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
6891bl.mailspike.net (result 127.0.0.11 = very bad reputation)
6423zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6337list.dnswl.org (not a blacklist!)
5570wl.mailspike.net (union of all results) (not a blacklist!)
4010bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
3585hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3495all.s5h.net
3436bl.score.senderscore.com
3395hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3371hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3343wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2687hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2166ix.dnsbl.manitu.net
2028zen.spamhaus.org (union of SBL and SBLCSS results)
1796bl.spamcannibal.org
1629spamsources.fabel.dk
1553wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1436zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1259free.v4bl.org
1029tr.countries.nerd.dk
762accredit.habeas.com (not a blacklist!)
638query.bondedsender.org (not a blacklist!)
630mail-abuse.blacklist.jippg.org
629wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
592zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
495korea.services.net
364all.spamrats.com (result 127.0.0.38 = spam source)
296bl.mav.com.br
213hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
188dnsbl.ahbl.org (union of all results)
178iadb.isipp.com (not a blacklist!)
167dnsbl.ahbl.org (result 127.0.0.4 = spam source)
96iadb2.isipp.com (not a blacklist!)
92dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
92dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
92dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
84tor.dnsbl.sectoor.de (union of all results)
83tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
45wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
21dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
12dnsbl-0.uceprotect.net
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3multi.surbl.org
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1spamguard.leadmon.net (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
80999(total number of IP addresses whose names were tested, including 153 at SDSC)
47763hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
37286hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
24550l1.apews.org
6326hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3211(union of most domain zones)
2515hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1228dbl.spamhaus.org (union of all results)
1225dbl.spamhaus.org (result 127.0.1.2 = spam source)
1162hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1071hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
487hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
302hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
166multi.surbl.org
153hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
117hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
76rhsbl.ahbl.org
48dob.sibl.support-intelligence.net
42fresh.spameatingmonkey.net
29urired.spameatingmonkey.net
7hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
3dbl.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
29688(total number of domains tested, including 116 at SDSC)
22422hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4638hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3419(union of most domain zones)
2626dbl.spamhaus.org (union of all results)
2622dbl.spamhaus.org (result 127.0.1.2 = spam source)
2283hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2085hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1524hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1432hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1192multi.surbl.org
919l1.apews.org
812dob.sibl.support-intelligence.net
638fresh.spameatingmonkey.net
216hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
109urired.spameatingmonkey.net
73hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
33rhsbl.ahbl.org
30hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
17hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
6ex.dnsbl.org
4dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 14 October 2013.