Blacklists Compared

29 March 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
57830(total number of IP addresses tested, including 145 at SDSC)
52541(union of most IP zones)
45558b.barracudacentral.org
44224zen.spamhaus.org (union of all results)
42303cbl.abuseat.org
42291zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
39148spam.dnsbl.sorbs.net
38429l2.apews.org
37385bl.tiopan.com
34942ubl.unsubscore.com
33931dnsbl-1.uceprotect.net
32074bl.mailspike.net (union of all results)
30197bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
29725psbl.surriel.com
27932hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
27905hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
25161dnsbl.sorbs.net (union of all results)
24909zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
22365bl.spameatingmonkey.net
22243dnsbl.inps.de
17177truncate.gbudb.net
16791db.wpbl.info
15340all.spamrats.com (union of all results)
15201dnsbl.sorbs.net (result 127.0.0.6 = spam source)
14302dnsbl-2.uceprotect.net
14021bl.spamcop.net
12906dnsbl-3.uceprotect.net
10881all.spamrats.com (result 127.0.0.36 = dialup)
10225dnsbl.sorbs.net (result 127.0.0.10 = dialup)
9001ix.dnsbl.manitu.net
7743dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6073list.dnswl.org (not a blacklist!)
5910zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5272wl.mailspike.net (union of all results) (not a blacklist!)
5165ips.backscatterer.org
4198all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3435bl.score.senderscore.com
3318hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3312hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2958wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2557hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2245hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1895bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1866all.s5h.net
1457wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1434zen.spamhaus.org (union of SBL and SBLCSS results)
1147bl.spamcannibal.org
1027spamsources.fabel.dk
930tr.countries.nerd.dk
831korea.services.net
804wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
778zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
768accredit.habeas.com (not a blacklist!)
693bl.mailspike.net (result 127.0.0.11 = very bad reputation)
684query.bondedsender.org (not a blacklist!)
656zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
629bl.mailspike.net (result 127.0.0.12 = bad reputation)
326all.spamrats.com (result 127.0.0.38 = spam source)
295hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
274free.v4bl.org
269mail-abuse.blacklist.jippg.org
185iadb.isipp.com (not a blacklist!)
108iadb2.isipp.com (not a blacklist!)
99dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
99dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
99dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
90bl.mav.com.br
53wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
28tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
28tor.dnsbl.sectoor.de (union of all results)
12multi.uribl.com (result 127.0.0.2 = spam resource)
12multi.uribl.com (union of all results)
9dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
6multi.surbl.org
5dnsbl-0.uceprotect.net
4spamguard.leadmon.net (union of all results)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
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
57830(total number of IP addresses whose names were tested, including 145 at SDSC)
36900hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
30204hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16080l1.apews.org
4302hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2480hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2283(union of most domain zones)
897hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
756hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
713dbl.spamhaus.org (result 127.0.1.2 = spam source)
713dbl.spamhaus.org (union of all results)
317hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
251hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
120hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
46multi.surbl.org
37multi.uribl.com (result 127.0.0.2 = spam resource)
37multi.uribl.com (union of all results)
26hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
18urired.spameatingmonkey.net
6dob.sibl.support-intelligence.net
3fresh.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
42763(total number of domains tested, including 98 at SDSC)
37404hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4810hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4177(union of most domain zones)
3095hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2923dbl.spamhaus.org (union of all results)
2922dbl.spamhaus.org (result 127.0.1.2 = spam source)
1698hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1598hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1579multi.surbl.org
1570hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1529multi.uribl.com (union of all results)
1516multi.uribl.com (result 127.0.0.2 = spam resource)
808l1.apews.org
273dob.sibl.support-intelligence.net
214fresh.spameatingmonkey.net
201hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
139urired.spameatingmonkey.net
51hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
41hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
21hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
3ex.dnsbl.org
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 2 April 2014.