Blacklists Compared

13 September 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
27463(total number of IP addresses tested, including 141 at SDSC)
24122(union of most IP zones)
16299b.barracudacentral.org
14379zen.spamhaus.org (union of all results)
14200l2.apews.org
13066hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
12363zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
12355cbl.abuseat.org
12300spam.dnsbl.sorbs.net
10778ubl.unsubscore.com
10455hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
9484all.s5h.net
8948dnsbl-1.uceprotect.net
8532zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
8281free.v4bl.org
7783bl.tiopan.com
7085all.spamrats.com (union of all results)
6616list.dnswl.org (not a blacklist!)
6511dnsbl.sorbs.net (union of all results)
5869dnsbl-2.uceprotect.net
5644wl.mailspike.net (union of all results) (not a blacklist!)
5492bl.mailspike.net (union of all results)
5101psbl.surriel.com
4839dnsbl-3.uceprotect.net
4535db.wpbl.info
4156all.spamrats.com (result 127.0.0.36 = dialup)
3719bl.spameatingmonkey.net
3647bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
3091hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2937dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2780wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2596dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
2535all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
2522hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2458truncate.gbudb.net
2367hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2335bl.spamcop.net
2315dnsbl.sorbs.net (result 127.0.0.10 = dialup)
2170dnsbl.inps.de
1867ips.backscatterer.org
1813bl.score.senderscore.com
1780hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1708wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1563zen.spamhaus.org (union of SBL and SBLCSS results)
1310zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1283bl.spamcannibal.org
1202zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
1020wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
886bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
750bl.mailspike.net (result 127.0.0.11 = very bad reputation)
733accredit.habeas.com (not a blacklist!)
665ix.dnsbl.manitu.net
663query.bondedsender.org (not a blacklist!)
635spamsources.fabel.dk
578mail-abuse.blacklist.jippg.org
553bl.mailspike.net (result 127.0.0.12 = bad reputation)
428all.spamrats.com (result 127.0.0.38 = spam source)
427korea.services.net
361zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
295tr.countries.nerd.dk
171iadb.isipp.com (not a blacklist!)
137wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
112hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
105iadb2.isipp.com (not a blacklist!)
31tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
31tor.dnsbl.sectoor.de (union of all results)
29dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
29dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
29dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
19multi.uribl.com (result 127.0.0.2 = spam resource)
19multi.uribl.com (union of all results)
15spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
15spamguard.leadmon.net (union of all results)
5dnsbl-0.uceprotect.net
5dnsbl.sorbs.net (result 127.0.0.5 = open relay)
3multi.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
27463(total number of IP addresses whose names were tested, including 141 at SDSC)
16733hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
13292hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3636l1.apews.org
2384hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2152hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2119(union of most domain zones)
995hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
785dbl.spamhaus.org (union of all results)
777dbl.spamhaus.org (result 127.0.1.2 = spam source)
671hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
450hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
98hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
78fresh.spameatingmonkey.net
74hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
72dob.sibl.support-intelligence.net
54hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
47multi.surbl.org
29multi.uribl.com (result 127.0.0.2 = spam resource)
29multi.uribl.com (union of all results)
14urired.spameatingmonkey.net
8dbl.spamhaus.org (result 127.0.1.102 = abused legitimate domain spam source)
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
17587(total number of domains tested, including 111 at SDSC)
12235hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3751(union of most domain zones)
3211hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2660dbl.spamhaus.org (union of all results)
2650dbl.spamhaus.org (result 127.0.1.2 = spam source)
2566hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1872multi.uribl.com (union of all results)
1856multi.uribl.com (result 127.0.0.2 = spam resource)
1852hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1636multi.surbl.org
1270hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1066hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
446dob.sibl.support-intelligence.net
443fresh.spameatingmonkey.net
391l1.apews.org
175hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
27hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
23hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
18urired.spameatingmonkey.net
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
8dbl.spamhaus.org (result 127.0.1.102 = abused legitimate domain spam source)
6multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
5ex.dnsbl.org
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1dbl.spamhaus.org (result 127.0.1.103 = abused legitimate domain redirects to spammer)
1dbl.spamhaus.org (result 127.0.1.4 = phish domain)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 14 September 2014.