Blacklists Compared

16 February 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, l2.apews.org, and ip.v4bl.org zones are also excluded from the union.

HitsDNS Zone
71877(total number of IP addresses tested, including 148 at SDSC)
67518(union of most IP zones)
58803b.barracudacentral.org
57569zen.spamhaus.org (union of all results)
56381l2.apews.org
55586cbl.abuseat.org
55582zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
51844bl.tiopan.com
51720ip.v4bl.org
45137bl.mailspike.net (union of all results)
42198hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
39350dnsbl-1.uceprotect.net
36033zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
35335bl.mailspike.net (result 127.0.0.12 = bad reputation)
34349ubl.unsubscore.com
31335hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
23806dnsbl.sorbs.net (union of all results)
22980spam.dnsbl.sorbs.net
22320all.spamrats.com (union of all results)
22034bl.spameatingmonkey.net
20372dnsbl-3.uceprotect.net
18531db.wpbl.info
18465dnsbl.inps.de
17564dnsbl-2.uceprotect.net
16771psbl.surriel.com
15729dnsbl.sorbs.net (result 127.0.0.10 = dialup)
15553free.v4bl.org
15119all.spamrats.com (result 127.0.0.36 = dialup)
8639truncate.gbudb.net
8374bl.mailspike.net (result 127.0.0.11 = very bad reputation)
8187dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
7808zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
7493wl.mailspike.net (union of all results) (not a blacklist!)
6915list.dnswl.org (not a blacklist!)
6823all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
5719bl.spamcop.net
5116wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
4909bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
4100ix.dnsbl.manitu.net
2987all.s5h.net
2969hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2813hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2787hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2723ips.backscatterer.org
2073wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1898dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1584hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1461bl.score.senderscore.com
1386bl.spamcannibal.org
954zen.spamhaus.org (union of SBL and SBLCSS results)
767tr.countries.nerd.dk
748accredit.habeas.com (not a blacklist!)
740spamsources.fabel.dk
622zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
603query.bondedsender.org (not a blacklist!)
495korea.services.net
445mail-abuse.blacklist.jippg.org
439all.spamrats.com (result 127.0.0.38 = spam source)
434hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
365dnsbl.njabl.org (union of all results)
332zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
312l2.bbfh.ext.sorbs.net
296dnsbl.njabl.org (result 127.0.0.9 = open proxy)
239bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
208iadb.isipp.com (not a blacklist!)
186wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
167dnsbl.ahbl.org (union of all results)
132dnsbl.ahbl.org (result 127.0.0.4 = spam source)
118wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
96iadb2.isipp.com (not a blacklist!)
43tor.dnsbl.sectoor.de (union of all results)
42dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
42dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
42dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
41tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
39dnsbl.njabl.org (result 127.0.0.2 = open relay)
30dnsbl.njabl.org (result 127.0.0.4 = spam source)
21dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
14dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
5dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4spamguard.leadmon.net (union of all results)
3multi.uribl.com (result 127.0.0.2 = spam resource)
3multi.surbl.org
3multi.uribl.com (union of all results)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1dnsbl-0.uceprotect.net
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
71877(total number of IP addresses whose names were tested, including 148 at SDSC)
47973hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
39729hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
25420l1.apews.org
5667hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2913hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2785(union of most domain zones)
1389hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
725hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
639dbl.spamhaus.org (result 127.0.1.2 = spam source)
639dbl.spamhaus.org (union of all results)
293hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
193hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
167urired.spameatingmonkey.net
113hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
60fresh.spameatingmonkey.net
55dob.sibl.support-intelligence.net
49multi.surbl.org
47multi.uribl.com (result 127.0.0.2 = spam resource)
47multi.uribl.com (union of all results)
23rhsbl.ahbl.org
21hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1ex.dnsbl.org
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
67609(total number of domains tested, including 97 at SDSC)
64911hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4548hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3789(union of most domain zones)
2904hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2721hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2357hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2077dbl.spamhaus.org (union of all results)
2070dbl.spamhaus.org (result 127.0.1.2 = spam source)
1643multi.surbl.org
1346multi.uribl.com (union of all results)
1328multi.uribl.com (result 127.0.0.2 = spam resource)
1274hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
791l1.apews.org
555urired.spameatingmonkey.net
485dob.sibl.support-intelligence.net
314fresh.spameatingmonkey.net
272hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
34hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
21rhsbl.ahbl.org
17multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
16hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
13hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
7ex.dnsbl.org
7dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 19 February 2013.