Blacklists Compared

30 August 2014

[ 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
35816(total number of IP addresses tested, including 141 at SDSC)
32558(union of most IP zones)
25202b.barracudacentral.org
24405l2.apews.org
22907zen.spamhaus.org (union of all results)
21357cbl.abuseat.org
21349zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
19194hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
19148ubl.unsubscore.com
18609spam.dnsbl.sorbs.net
17714hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
17528dnsbl-1.uceprotect.net
16375all.s5h.net
14428bl.tiopan.com
13820zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
12606psbl.surriel.com
11159bl.mailspike.net (union of all results)
10608free.v4bl.org
10393dnsbl.sorbs.net (union of all results)
9911db.wpbl.info
9862all.spamrats.com (union of all results)
8688bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
8662dnsbl-2.uceprotect.net
8184dnsbl-3.uceprotect.net
7850bl.spameatingmonkey.net
6277list.dnswl.org (not a blacklist!)
5755all.spamrats.com (result 127.0.0.36 = dialup)
5502bl.spamcop.net
5440dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5333wl.mailspike.net (union of all results) (not a blacklist!)
4349truncate.gbudb.net
3805dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3649all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3622dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3604bl.score.senderscore.com
3271ix.dnsbl.manitu.net
3046hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2977hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2762wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2557ips.backscatterer.org
2133zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1846hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1718mail-abuse.blacklist.jippg.org
1607bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1455hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1429bl.spamcannibal.org
1374wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1276dnsbl.inps.de
1179zen.spamhaus.org (union of SBL and SBLCSS results)
1014wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
887bl.mailspike.net (result 127.0.0.11 = very bad reputation)
765accredit.habeas.com (not a blacklist!)
716spamsources.fabel.dk
676zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
673query.bondedsender.org (not a blacklist!)
590bl.mailspike.net (result 127.0.0.12 = bad reputation)
503zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
503all.spamrats.com (result 127.0.0.38 = spam source)
479korea.services.net
232tr.countries.nerd.dk
183wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
165iadb.isipp.com (not a blacklist!)
147hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
86iadb2.isipp.com (not a blacklist!)
39dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
39dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
39dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
28tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
28tor.dnsbl.sectoor.de (union of all results)
19multi.uribl.com (union of all results)
18multi.uribl.com (result 127.0.0.2 = spam resource)
12spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
12spamguard.leadmon.net (union of all results)
5dnsbl.sorbs.net (result 127.0.0.5 = open relay)
4multi.surbl.org
3dnsbl-0.uceprotect.net
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
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
35816(total number of IP addresses whose names were tested, including 141 at SDSC)
21415hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16791hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7321l1.apews.org
2571hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2322hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1775(union of most domain zones)
814dbl.spamhaus.org (union of all results)
810dbl.spamhaus.org (result 127.0.1.2 = spam source)
705hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
436hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
410hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
118hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
80hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
57multi.surbl.org
48multi.uribl.com (union of all results)
47multi.uribl.com (result 127.0.0.2 = spam resource)
31fresh.spameatingmonkey.net
27hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
18urired.spameatingmonkey.net
14dob.sibl.support-intelligence.net
4dbl.spamhaus.org (result 127.0.1.102 = abused legitimate domain spam source)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
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
27275(total number of domains tested, including 105 at SDSC)
17280hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3956(union of most domain zones)
3512hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2794dbl.spamhaus.org (union of all results)
2782dbl.spamhaus.org (result 127.0.1.2 = spam source)
2740hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2157hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1844multi.uribl.com (union of all results)
1828multi.uribl.com (result 127.0.0.2 = spam resource)
1755multi.surbl.org
1316hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1273hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
496l1.apews.org
487fresh.spameatingmonkey.net
487dob.sibl.support-intelligence.net
197hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
45hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
36hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
20urired.spameatingmonkey.net
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
11hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
9dbl.spamhaus.org (result 127.0.1.102 = abused legitimate domain spam source)
6ex.dnsbl.org
4multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2dbl.spamhaus.org (result 127.0.1.103 = abused legitimate domain redirects to spammer)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1dbl.spamhaus.org (result 127.0.1.4 = phish domain)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 31 August 2014.