Blacklists Compared

17 May 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
32685(total number of IP addresses tested, including 146 at SDSC)
28112(union of most IP zones)
21318l2.apews.org
21264b.barracudacentral.org
18756zen.spamhaus.org (union of all results)
17603hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16107cbl.abuseat.org
16103zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
15062hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
14966spam.dnsbl.sorbs.net
14116dnsbl-1.uceprotect.net
12415bl.tiopan.com
11675ubl.unsubscore.com
9960psbl.surriel.com
9793zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
9434bl.mailspike.net (union of all results)
9109dnsbl.sorbs.net (union of all results)
7805dnsbl.inps.de
7606bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
7556all.spamrats.com (union of all results)
6547bl.spamcop.net
6426list.dnswl.org (not a blacklist!)
6274dnsbl-2.uceprotect.net
5805truncate.gbudb.net
5729db.wpbl.info
5720wl.mailspike.net (union of all results) (not a blacklist!)
5503dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4860all.spamrats.com (result 127.0.0.36 = dialup)
4423bl.spameatingmonkey.net
4032dnsbl-3.uceprotect.net
3291bl.score.senderscore.com
3259ix.dnsbl.manitu.net
3252hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3240dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3079wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2891dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
2799hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2469hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2328all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
2228hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2160zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1913mail-abuse.blacklist.jippg.org
1863zen.spamhaus.org (union of SBL and SBLCSS results)
1832ips.backscatterer.org
1594wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1371bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1277zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
1226bl.spamcannibal.org
991wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
810spamsources.fabel.dk
792bl.mailspike.net (result 127.0.0.11 = very bad reputation)
754accredit.habeas.com (not a blacklist!)
691query.bondedsender.org (not a blacklist!)
635all.s5h.net
627korea.services.net
586zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
548free.v4bl.org
476bl.mailspike.net (result 127.0.0.12 = bad reputation)
397tr.countries.nerd.dk
396all.spamrats.com (result 127.0.0.38 = spam source)
204hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
171iadb.isipp.com (not a blacklist!)
90iadb2.isipp.com (not a blacklist!)
82dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
82dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
82dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
82bl.mav.com.br
56wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
42tor.dnsbl.sectoor.de (union of all results)
41tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
34spamguard.leadmon.net (union of all results)
33spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
11multi.uribl.com (result 127.0.0.2 = spam resource)
11multi.uribl.com (union of all results)
8multi.surbl.org
5dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2dnsbl-0.uceprotect.net
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
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
32685(total number of IP addresses whose names were tested, including 146 at SDSC)
20148hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16359hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6342l1.apews.org
2404hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2339(union of most domain zones)
2167hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
964hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
859dbl.spamhaus.org (result 127.0.1.2 = spam source)
859dbl.spamhaus.org (union of all results)
690hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
450hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
143hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
137hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
66multi.surbl.org
61multi.uribl.com (result 127.0.0.2 = spam resource)
61multi.uribl.com (union of all results)
60dob.sibl.support-intelligence.net
45fresh.spameatingmonkey.net
22hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
13urired.spameatingmonkey.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
26258(total number of domains tested, including 92 at SDSC)
17909hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4969(union of most domain zones)
4039hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3957hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
3585dbl.spamhaus.org (result 127.0.1.2 = spam source)
3585dbl.spamhaus.org (union of all results)
2910hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2434multi.uribl.com (union of all results)
2423multi.uribl.com (result 127.0.0.2 = spam resource)
1981multi.surbl.org
1571hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1421hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
918dob.sibl.support-intelligence.net
731l1.apews.org
333fresh.spameatingmonkey.net
236hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
102urired.spameatingmonkey.net
49hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
29hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
13hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
6ex.dnsbl.org
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 May 2014.