Blacklists Compared

3 August 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
75744(total number of IP addresses tested, including 145 at SDSC)
70659(union of most IP zones)
62086zen.spamhaus.org (union of all results)
61773b.barracudacentral.org
61369l2.apews.org
56008cbl.abuseat.org
56005zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
54331bl.tiopan.com
49993spam.dnsbl.sorbs.net
42817hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
42751bl.mailspike.net (union of all results)
41375dnsbl-1.uceprotect.net
40620psbl.surriel.com
40606zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
37959hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
36525db.wpbl.info
35100dnsbl.sorbs.net (union of all results)
29326bl.spameatingmonkey.net
27859bl.mailspike.net (result 127.0.0.12 = bad reputation)
25144dnsbl.inps.de
24266all.spamrats.com (union of all results)
23028dnsbl-2.uceprotect.net
22806ubl.unsubscore.com
22582dnsbl-3.uceprotect.net
20612truncate.gbudb.net
19411dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
19016bl.score.senderscore.com
16908dnsbl.sorbs.net (result 127.0.0.6 = spam source)
16497all.spamrats.com (result 127.0.0.36 = dialup)
14963ips.backscatterer.org
13479dnsbl.sorbs.net (result 127.0.0.10 = dialup)
13284bl.spamcop.net
10741bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
7552all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
6529zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6305ix.dnsbl.manitu.net
6228list.dnswl.org (not a blacklist!)
5586wl.mailspike.net (union of all results) (not a blacklist!)
4247bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
4173hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3679all.s5h.net
3547wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3294hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2796bl.mailspike.net (result 127.0.0.11 = very bad reputation)
2546hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2258hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2077free.v4bl.org
1743zen.spamhaus.org (union of SBL and SBLCSS results)
1664bl.spamcannibal.org
1562spamsources.fabel.dk
1387wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1326zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
1255tr.countries.nerd.dk
897mail-abuse.blacklist.jippg.org
745accredit.habeas.com (not a blacklist!)
633query.bondedsender.org (not a blacklist!)
563wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
495hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
460korea.services.net
417zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
359bl.mav.com.br
282all.spamrats.com (result 127.0.0.38 = spam source)
180iadb.isipp.com (not a blacklist!)
115iadb2.isipp.com (not a blacklist!)
111dnsbl.ahbl.org (union of all results)
93dnsbl.ahbl.org (result 127.0.0.4 = spam source)
89wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
69tor.dnsbl.sectoor.de (union of all results)
66tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
53dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
53dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
53dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
18dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
12dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
9dnsbl-0.uceprotect.net
3wadb.isipp.com
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2multi.surbl.org
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1l2.bbfh.ext.sorbs.net
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
75744(total number of IP addresses whose names were tested, including 145 at SDSC)
44834hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
35941hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
23163l1.apews.org
6263hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2742(union of most domain zones)
2546hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1087hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1044dbl.spamhaus.org (result 127.0.1.2 = spam source)
1044dbl.spamhaus.org (union of all results)
882hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
302hostkarma.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)
164fresh.spameatingmonkey.net
133hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
122dob.sibl.support-intelligence.net
93multi.surbl.org
48rhsbl.ahbl.org
28urired.spameatingmonkey.net
10hostkarma.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
72172(total number of domains tested, including 97 at SDSC)
65739hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3255hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3116(union of most domain zones)
2242hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2143dbl.spamhaus.org (union of all results)
2140dbl.spamhaus.org (result 127.0.1.2 = spam source)
1562multi.surbl.org
1535hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1431hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1255hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
690dob.sibl.support-intelligence.net
599fresh.spameatingmonkey.net
371l1.apews.org
212hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
108hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
39urired.spameatingmonkey.net
31rhsbl.ahbl.org
28hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
18hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
5ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
3dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 5 August 2013.