Blacklists Compared

7 June 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
53717(total number of IP addresses tested, including 153 at SDSC)
49063(union of most IP zones)
41734b.barracudacentral.org
39829zen.spamhaus.org (union of all results)
37508cbl.abuseat.org
37495zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
34561ubl.unsubscore.com
32488all.s5h.net
32191spam.dnsbl.sorbs.net
31130hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
30975dnsbl-1.uceprotect.net
30095l2.apews.org
27636bl.tiopan.com
26582hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
24614psbl.surriel.com
23008zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
21594bl.mailspike.net (union of all results)
17525dnsbl.sorbs.net (union of all results)
17459dnsbl.inps.de
17343bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
15358db.wpbl.info
15292bl.spameatingmonkey.net
13881dnsbl-2.uceprotect.net
13851all.spamrats.com (union of all results)
12666dnsbl-3.uceprotect.net
12111truncate.gbudb.net
9260all.spamrats.com (result 127.0.0.36 = dialup)
7393dnsbl.sorbs.net (result 127.0.0.10 = dialup)
7262dnsbl.sorbs.net (result 127.0.0.6 = spam source)
7134dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6368list.dnswl.org (not a blacklist!)
5874ips.backscatterer.org
5496wl.mailspike.net (union of all results) (not a blacklist!)
4203all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
4004bl.spamcop.net
3998zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3465hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3382wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3285hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3206hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2774bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
2739hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1744bl.mailspike.net (result 127.0.0.11 = very bad reputation)
1694zen.spamhaus.org (union of SBL and SBLCSS results)
1569wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1476bl.spamcannibal.org
1474ix.dnsbl.manitu.net
1244zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
981bl.mailspike.net (result 127.0.0.12 = bad reputation)
965bl.score.senderscore.com
945spamsources.fabel.dk
941free.v4bl.org
758korea.services.net
739accredit.habeas.com (not a blacklist!)
667query.bondedsender.org (not a blacklist!)
457wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
450zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
428tr.countries.nerd.dk
426all.spamrats.com (result 127.0.0.38 = spam source)
308mail-abuse.blacklist.jippg.org
268hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
171iadb.isipp.com (not a blacklist!)
112dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
112dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
112dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
93iadb2.isipp.com (not a blacklist!)
88wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
59bl.mav.com.br
41tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
41tor.dnsbl.sectoor.de (union of all results)
15multi.uribl.com (result 127.0.0.2 = spam resource)
15multi.uribl.com (union of all results)
8multi.surbl.org
5dnsbl.sorbs.net (result 127.0.0.5 = open relay)
4spamguard.leadmon.net (union of all results)
3spamguard.leadmon.net (result 127.0.0.9 = abused DNS 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
53717(total number of IP addresses whose names were tested, including 153 at SDSC)
32808hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
26558hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
12042l1.apews.org
3702hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2436hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1820(union of most domain zones)
832hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
657dbl.spamhaus.org (result 127.0.1.2 = spam source)
657dbl.spamhaus.org (union of all results)
485hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
307hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
180hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
133hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
69multi.surbl.org
47multi.uribl.com (result 127.0.0.2 = spam resource)
47multi.uribl.com (union of all results)
24fresh.spameatingmonkey.net
23dob.sibl.support-intelligence.net
21hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
19urired.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
39430(total number of domains tested, including 117 at SDSC)
27467hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5408(union of most domain zones)
4532hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4071hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
3822dbl.spamhaus.org (result 127.0.1.2 = spam source)
3822dbl.spamhaus.org (union of all results)
2745hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2307multi.surbl.org
2128multi.uribl.com (union of all results)
2115multi.uribl.com (result 127.0.0.2 = spam resource)
1474hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1449hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
994l1.apews.org
787dob.sibl.support-intelligence.net
299fresh.spameatingmonkey.net
256urired.spameatingmonkey.net
224hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
38hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
24hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
18hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8ex.dnsbl.org
2multi.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 10 June 2014.