Blacklists Compared

5 July 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
25024(total number of IP addresses tested, including 154 at SDSC)
20479(union of most IP zones)
14247b.barracudacentral.org
13129l2.apews.org
11857zen.spamhaus.org (union of all results)
10632hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
9971spam.dnsbl.sorbs.net
9942cbl.abuseat.org
9940zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
9653hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
8890ubl.unsubscore.com
7262zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
6915bl.tiopan.com
6240all.s5h.net
6051dnsbl-1.uceprotect.net
6022list.dnswl.org (not a blacklist!)
5262all.spamrats.com (union of all results)
5231wl.mailspike.net (union of all results) (not a blacklist!)
4661db.wpbl.info
4549dnsbl.inps.de
4441dnsbl.sorbs.net (union of all results)
4251psbl.surriel.com
3839bl.mailspike.net (union of all results)
3834dnsbl-2.uceprotect.net
3215ips.backscatterer.org
3042hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2896all.spamrats.com (result 127.0.0.36 = dialup)
2736wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2686bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
2579truncate.gbudb.net
2475hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2372dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
2221bl.spameatingmonkey.net
2058all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
2007hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1874dnsbl-3.uceprotect.net
1846bl.spamcop.net
1570zen.spamhaus.org (union of SBL and SBLCSS results)
1519dnsbl.sorbs.net (result 127.0.0.10 = dialup)
1498hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1403wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1373dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1337bl.spamcannibal.org
1036ix.dnsbl.manitu.net
958wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
949zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
795zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
714accredit.habeas.com (not a blacklist!)
652spamsources.fabel.dk
648bl.score.senderscore.com
644query.bondedsender.org (not a blacklist!)
625bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
621zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
513korea.services.net
501free.v4bl.org
410bl.mailspike.net (result 127.0.0.12 = bad reputation)
389bl.mailspike.net (result 127.0.0.11 = very bad reputation)
327all.spamrats.com (result 127.0.0.38 = spam source)
267mail-abuse.blacklist.jippg.org
154tr.countries.nerd.dk
149iadb.isipp.com (not a blacklist!)
134wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
93iadb2.isipp.com (not a blacklist!)
69dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
69dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
69dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
67hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
64bl.mav.com.br
32tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
32tor.dnsbl.sectoor.de (union of all results)
29multi.uribl.com (union of all results)
27multi.uribl.com (result 127.0.0.2 = spam resource)
8dnsbl-0.uceprotect.net
7dnsbl.sorbs.net (result 127.0.0.5 = open relay)
7spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
7spamguard.leadmon.net (union of all results)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2multi.surbl.org
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
25024(total number of IP addresses whose names were tested, including 154 at SDSC)
14714hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
11633hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2690l1.apews.org
2264hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2158(union of most domain zones)
1832hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
870hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
804hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
793dbl.spamhaus.org (result 127.0.1.2 = spam source)
793dbl.spamhaus.org (union of all results)
396hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
124hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
94hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
68multi.surbl.org
48multi.uribl.com (result 127.0.0.2 = spam resource)
48multi.uribl.com (union of all results)
19urired.spameatingmonkey.net
12hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
9fresh.spameatingmonkey.net
9dob.sibl.support-intelligence.net
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
16819(total number of domains tested, including 109 at SDSC)
10427hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4711(union of most domain zones)
3608dbl.spamhaus.org (union of all results)
3605dbl.spamhaus.org (result 127.0.1.2 = spam source)
3507hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2883hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2583hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2020multi.uribl.com (union of all results)
2004multi.uribl.com (result 127.0.0.2 = spam resource)
1895multi.surbl.org
1526dob.sibl.support-intelligence.net
1515fresh.spameatingmonkey.net
1232hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1179hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
329l1.apews.org
207hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
58hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
52urired.spameatingmonkey.net
21hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
6multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
6hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
3ex.dnsbl.org
2dbl.spamhaus.org (result 127.0.1.4 = phish domain)
1dbl.spamhaus.org (result 127.0.1.102 = abused legitimate domain spam source)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 6 July 2014.