Blacklists Compared

30 November 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
44118(total number of IP addresses tested, including 133 at SDSC)
39426(union of most IP zones)
33178l2.apews.org
32564b.barracudacentral.org
31041zen.spamhaus.org (union of all results)
25341hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
23812cbl.abuseat.org
23807zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
23360spam.dnsbl.sorbs.net
21627hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
21448ubl.unsubscore.com
21417dnsbl-1.uceprotect.net
20437zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
19085bl.tiopan.com
18171bl.mailspike.net (union of all results)
15157db.wpbl.info
15037psbl.surriel.com
15032dnsbl.sorbs.net (union of all results)
14407all.spamrats.com (union of all results)
12107bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
11867dnsbl.inps.de
10136bl.spameatingmonkey.net
9881all.spamrats.com (result 127.0.0.36 = dialup)
8999dnsbl-2.uceprotect.net
8125dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
7498dnsbl-3.uceprotect.net
7420truncate.gbudb.net
6588ips.backscatterer.org
6470dnsbl.sorbs.net (result 127.0.0.10 = dialup)
5830list.dnswl.org (not a blacklist!)
5795bl.spamcop.net
4999wl.mailspike.net (union of all results) (not a blacklist!)
4188all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3537bl.mailspike.net (result 127.0.0.11 = very bad reputation)
3333hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2947wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2859dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2778zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2770bl.score.senderscore.com
2528hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2467hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2304hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2125ix.dnsbl.manitu.net
1853bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1779bl.mailspike.net (result 127.0.0.12 = bad reputation)
1716mail-abuse.blacklist.jippg.org
1359wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1336bl.spamcannibal.org
1283zen.spamhaus.org (union of SBL and SBLCSS results)
1093spamsources.fabel.dk
853accredit.habeas.com (not a blacklist!)
799query.bondedsender.org (not a blacklist!)
743zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
717all.s5h.net
586wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
540zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
436tr.countries.nerd.dk
371all.spamrats.com (result 127.0.0.38 = spam source)
361korea.services.net
309free.v4bl.org
213iadb.isipp.com (not a blacklist!)
153iadb2.isipp.com (not a blacklist!)
107wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
90hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
66dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
66dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
66dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
64bl.mav.com.br
61dnsbl.ahbl.org (union of all results)
53dnsbl.ahbl.org (result 127.0.0.4 = spam source)
46tor.dnsbl.sectoor.de (union of all results)
45tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
8dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
7dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
6spamguard.leadmon.net (union of all results)
5dnsbl-0.uceprotect.net
5spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2multi.surbl.org
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
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
44118(total number of IP addresses whose names were tested, including 133 at SDSC)
26556hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
21891hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
10747l1.apews.org
3604hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2327hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2283(union of most domain zones)
869hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
815dbl.spamhaus.org (result 127.0.1.2 = spam source)
815dbl.spamhaus.org (union of all results)
746hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
382hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
160hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
112fresh.spameatingmonkey.net
111dob.sibl.support-intelligence.net
87hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
59multi.surbl.org
41rhsbl.ahbl.org
38hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
22urired.spameatingmonkey.net
3hostkarma.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
16345(total number of domains tested, including 91 at SDSC)
12891hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3723hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3060(union of most domain zones)
2240dbl.spamhaus.org (result 127.0.1.2 = spam source)
2240dbl.spamhaus.org (union of all results)
1904hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1729hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1210hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1065hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
819multi.surbl.org
713fresh.spameatingmonkey.net
616l1.apews.org
547dob.sibl.support-intelligence.net
206hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
184hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
40urired.spameatingmonkey.net
32rhsbl.ahbl.org
22hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
16hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
6ex.dnsbl.org
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 1 December 2013.