Blacklists Compared

7 December 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
46136(total number of IP addresses tested, including 151 at SDSC)
40254(union of most IP zones)
33823l2.apews.org
32522b.barracudacentral.org
32356zen.spamhaus.org (union of all results)
28753cbl.abuseat.org
28751zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
25674hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
24995spam.dnsbl.sorbs.net
24989hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
21530ubl.unsubscore.com
21442dnsbl-1.uceprotect.net
20585zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
19159bl.tiopan.com
18575bl.mailspike.net (union of all results)
18182dnsbl.sorbs.net (union of all results)
17759db.wpbl.info
16232psbl.surriel.com
13788all.spamrats.com (union of all results)
12916dnsbl.inps.de
12586bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
10964truncate.gbudb.net
10928bl.spameatingmonkey.net
9888dnsbl-2.uceprotect.net
9886dnsbl.sorbs.net (result 127.0.0.6 = spam source)
9331all.spamrats.com (result 127.0.0.36 = dialup)
9143bl.spamcop.net
8829dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
8782dnsbl-3.uceprotect.net
7887bl.score.senderscore.com
7594ips.backscatterer.org
6688list.dnswl.org (not a blacklist!)
6279dnsbl.sorbs.net (result 127.0.0.10 = dialup)
5652wl.mailspike.net (union of all results) (not a blacklist!)
4123ix.dnsbl.manitu.net
4112all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3592hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3510bl.mailspike.net (result 127.0.0.11 = very bad reputation)
3340wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3048hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2640zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2589hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2393hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1811bl.mailspike.net (result 127.0.0.12 = bad reputation)
1708bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1499wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1464bl.spamcannibal.org
1183zen.spamhaus.org (union of SBL and SBLCSS results)
1066spamsources.fabel.dk
896accredit.habeas.com (not a blacklist!)
837query.bondedsender.org (not a blacklist!)
786all.s5h.net
686wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
654zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
529zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
526tr.countries.nerd.dk
401free.v4bl.org
399korea.services.net
379all.spamrats.com (result 127.0.0.38 = spam source)
374mail-abuse.blacklist.jippg.org
224iadb.isipp.com (not a blacklist!)
148hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
141iadb2.isipp.com (not a blacklist!)
127wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
83bl.mav.com.br
74dnsbl.ahbl.org (union of all results)
63dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
63dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
63dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
62dnsbl.ahbl.org (result 127.0.0.4 = spam source)
46tor.dnsbl.sectoor.de (union of all results)
42tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
11dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
6dnsbl-0.uceprotect.net
5multi.surbl.org
4tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4spamguard.leadmon.net (union of all results)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
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
46136(total number of IP addresses whose names were tested, including 151 at SDSC)
28196hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
23068hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
11101l1.apews.org
3583hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2673hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1846(union of most domain zones)
739dbl.spamhaus.org (result 127.0.1.2 = spam source)
739dbl.spamhaus.org (union of all results)
722hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
409hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
298hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
179hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
105hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
58rhsbl.ahbl.org
51fresh.spameatingmonkey.net
50multi.surbl.org
43hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
37dob.sibl.support-intelligence.net
22urired.spameatingmonkey.net
4hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
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
19156(total number of domains tested, including 108 at SDSC)
15117hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4365hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3101(union of most domain zones)
2186hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2071dbl.spamhaus.org (result 127.0.1.2 = spam source)
2071dbl.spamhaus.org (union of all results)
1892hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1537hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1292hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1089multi.surbl.org
732fresh.spameatingmonkey.net
651dob.sibl.support-intelligence.net
650l1.apews.org
196hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
43hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
29rhsbl.ahbl.org
17urired.spameatingmonkey.net
16hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
13hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
6ex.dnsbl.org
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 8 December 2013.