Blacklists Compared

12 April 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
59865(total number of IP addresses tested, including 143 at SDSC)
54769(union of most IP zones)
46810b.barracudacentral.org
45953zen.spamhaus.org (union of all results)
45041l2.apews.org
43756zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
43756cbl.abuseat.org
41162spam.dnsbl.sorbs.net
38582ubl.unsubscore.com
37282psbl.surriel.com
36057hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
35923dnsbl-1.uceprotect.net
34991bl.tiopan.com
30237bl.mailspike.net (union of all results)
29703hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
24821zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
24188db.wpbl.info
24094dnsbl.sorbs.net (union of all results)
23064dnsbl.inps.de
20006bl.spameatingmonkey.net
16549bl.mailspike.net (result 127.0.0.12 = bad reputation)
16204all.spamrats.com (union of all results)
14803dnsbl-2.uceprotect.net
13593dnsbl-3.uceprotect.net
13224dnsbl.sorbs.net (result 127.0.0.6 = spam source)
12813bl.spamcop.net
11564all.spamrats.com (result 127.0.0.36 = dialup)
10579dnsbl.sorbs.net (result 127.0.0.10 = dialup)
8382bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
7252dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6572zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6534ix.dnsbl.manitu.net
6188list.dnswl.org (not a blacklist!)
5677wl.mailspike.net (union of all results) (not a blacklist!)
5345bl.score.senderscore.com
4324all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
4176ips.backscatterer.org
4118bl.mailspike.net (result 127.0.0.11 = very bad reputation)
3915truncate.gbudb.net
3426hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3421hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3118wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2970bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
2604hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2196hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1747all.s5h.net
1674wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1557zen.spamhaus.org (union of SBL and SBLCSS results)
1377bl.spamcannibal.org
1083korea.services.net
1011spamsources.fabel.dk
1006tr.countries.nerd.dk
863zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
838wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
773accredit.habeas.com (not a blacklist!)
699query.bondedsender.org (not a blacklist!)
694zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
492hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
383all.spamrats.com (result 127.0.0.38 = spam source)
211mail-abuse.blacklist.jippg.org
202free.v4bl.org
146iadb.isipp.com (not a blacklist!)
109bl.mav.com.br
84dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
84dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
84dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
84iadb2.isipp.com (not a blacklist!)
52tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
52tor.dnsbl.sectoor.de (union of all results)
47wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
15multi.uribl.com (result 127.0.0.2 = spam resource)
15multi.uribl.com (union of all results)
9dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
6spamguard.leadmon.net (union of all results)
4spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
3multi.surbl.org
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1wadb.isipp.com
1dnsbl-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
59865(total number of IP addresses whose names were tested, including 143 at SDSC)
38006hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
31381hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18438l1.apews.org
4181hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2515hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2107(union of most domain zones)
890dbl.spamhaus.org (result 127.0.1.2 = spam source)
890dbl.spamhaus.org (union of all results)
703hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
484hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
454hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
298hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
123hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
97multi.uribl.com (result 127.0.0.2 = spam resource)
97multi.uribl.com (union of all results)
43multi.surbl.org
27urired.spameatingmonkey.net
19hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
16dob.sibl.support-intelligence.net
15fresh.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
42259(total number of domains tested, including 122 at SDSC)
36310hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5049hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4306(union of most domain zones)
2816dbl.spamhaus.org (union of all results)
2812dbl.spamhaus.org (result 127.0.1.2 = spam source)
2716hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2145hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1686multi.uribl.com (union of all results)
1671multi.uribl.com (result 127.0.0.2 = spam resource)
1613multi.surbl.org
1535hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1527hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1096l1.apews.org
472dob.sibl.support-intelligence.net
424hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
395fresh.spameatingmonkey.net
307hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
71urired.spameatingmonkey.net
41hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
21hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
5ex.dnsbl.org
4multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
4dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 15 April 2014.