Blacklists Compared

6 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
32382(total number of IP addresses tested, including 142 at SDSC)
29086(union of most IP zones)
21334b.barracudacentral.org
20857l2.apews.org
19726zen.spamhaus.org (union of all results)
18015cbl.abuseat.org
18011zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
15573spam.dnsbl.sorbs.net
15547hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14796ubl.unsubscore.com
14440hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
14389all.s5h.net
12766dnsbl-1.uceprotect.net
12328zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
10636bl.tiopan.com
9272free.v4bl.org
9066all.spamrats.com (union of all results)
8624dnsbl-2.uceprotect.net
8196dnsbl.sorbs.net (union of all results)
7677bl.mailspike.net (union of all results)
7578dnsbl-3.uceprotect.net
6494db.wpbl.info
6437psbl.surriel.com
6343list.dnswl.org (not a blacklist!)
5492bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
5352wl.mailspike.net (union of all results) (not a blacklist!)
5205all.spamrats.com (result 127.0.0.36 = dialup)
5105bl.spameatingmonkey.net
3615dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3496truncate.gbudb.net
3454all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3331dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2935hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2888bl.spamcop.net
2848dnsbl.sorbs.net (result 127.0.0.10 = dialup)
2710wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2673hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2229dnsbl.inps.de
2039hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2017ips.backscatterer.org
1974hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1715zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1644bl.score.senderscore.com
1537bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1382bl.spamcannibal.org
1365wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1192zen.spamhaus.org (union of SBL and SBLCSS results)
1113wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
800zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
792ix.dnsbl.manitu.net
744spamsources.fabel.dk
735accredit.habeas.com (not a blacklist!)
683bl.mailspike.net (result 127.0.0.11 = very bad reputation)
660query.bondedsender.org (not a blacklist!)
559korea.services.net
519bl.mailspike.net (result 127.0.0.12 = bad reputation)
444all.spamrats.com (result 127.0.0.38 = spam source)
392zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
390mail-abuse.blacklist.jippg.org
289tr.countries.nerd.dk
168iadb.isipp.com (not a blacklist!)
164wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
111hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
107iadb2.isipp.com (not a blacklist!)
46dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
46dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
46dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
35tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
35tor.dnsbl.sectoor.de (union of all results)
19spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
19spamguard.leadmon.net (union of all results)
14multi.uribl.com (result 127.0.0.2 = spam resource)
14multi.uribl.com (union of all results)
3multi.surbl.org
3dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2dnsbl-0.uceprotect.net
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
32382(total number of IP addresses whose names were tested, including 142 at SDSC)
18565hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
14706hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
5441l1.apews.org
2329hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2220hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1810(union of most domain zones)
749dbl.spamhaus.org (union of all results)
748hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
744dbl.spamhaus.org (result 127.0.1.2 = spam source)
509hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
366hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
101fresh.spameatingmonkey.net
92hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
72hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
72dob.sibl.support-intelligence.net
42multi.surbl.org
31hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
24multi.uribl.com (result 127.0.0.2 = spam resource)
24multi.uribl.com (union of all results)
20urired.spameatingmonkey.net
5dbl.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
23994(total number of domains tested, including 116 at SDSC)
15163hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3869(union of most domain zones)
3394hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2767hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2666dbl.spamhaus.org (union of all results)
2655dbl.spamhaus.org (result 127.0.1.2 = spam source)
1937hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1661multi.uribl.com (union of all results)
1645multi.uribl.com (result 127.0.0.2 = spam resource)
1606multi.surbl.org
1291hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1239hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
518dob.sibl.support-intelligence.net
512fresh.spameatingmonkey.net
465l1.apews.org
198hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
34hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
25hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
15urired.spameatingmonkey.net
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
7dbl.spamhaus.org (result 127.0.1.102 = abused legitimate domain spam source)
4multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
4ex.dnsbl.org
3dbl.spamhaus.org (result 127.0.1.4 = phish domain)
1dbl.spamhaus.org (result 127.0.1.103 = abused legitimate domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 7 September 2014.