Blacklists Compared

4 January 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
52058(total number of IP addresses tested, including 138 at SDSC)
47861(union of most IP zones)
42691b.barracudacentral.org
42575zen.spamhaus.org (union of all results)
42454l2.apews.org
41086zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
41086cbl.abuseat.org
37559spam.dnsbl.sorbs.net
35521hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
34301dnsbl-1.uceprotect.net
33856ubl.unsubscore.com
33264bl.mailspike.net (union of all results)
32238hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
32224psbl.surriel.com
30711bl.tiopan.com
30087db.wpbl.info
27508bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
26522zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
25260dnsbl.sorbs.net (union of all results)
21574bl.spameatingmonkey.net
18149dnsbl.inps.de
16590truncate.gbudb.net
15683dnsbl.sorbs.net (result 127.0.0.6 = spam source)
14904all.spamrats.com (union of all results)
13798dnsbl-2.uceprotect.net
13699bl.spamcop.net
12179dnsbl-3.uceprotect.net
10408all.spamrats.com (result 127.0.0.36 = dialup)
9923dnsbl.sorbs.net (result 127.0.0.10 = dialup)
9120dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
8743bl.score.senderscore.com
6030ix.dnsbl.manitu.net
5761ips.backscatterer.org
5614zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4749bl.mailspike.net (result 127.0.0.11 = very bad reputation)
4742list.dnswl.org (not a blacklist!)
4343all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
4055wl.mailspike.net (union of all results) (not a blacklist!)
2833hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2658hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2329wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2036bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1571hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1515hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1171all.s5h.net
1097bl.spamcannibal.org
1073wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1071spamsources.fabel.dk
1053zen.spamhaus.org (union of SBL and SBLCSS results)
1036tr.countries.nerd.dk
708accredit.habeas.com (not a blacklist!)
641query.bondedsender.org (not a blacklist!)
589zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
565wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
563bl.mailspike.net (result 127.0.0.12 = bad reputation)
538free.v4bl.org
464zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
437korea.services.net
262mail-abuse.blacklist.jippg.org
199all.spamrats.com (result 127.0.0.38 = spam source)
143hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
128iadb.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)
88wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
76iadb2.isipp.com (not a blacklist!)
66dnsbl.ahbl.org (union of all results)
56dnsbl.ahbl.org (result 127.0.0.4 = spam source)
32tor.dnsbl.sectoor.de (union of all results)
29tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
10bl.mav.com.br
10dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
6spamguard.leadmon.net (union of all results)
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2multi.surbl.org
1wadb.isipp.com
1dnsbl-0.uceprotect.net
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
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
52058(total number of IP addresses whose names were tested, including 138 at SDSC)
32179hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
26414hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
17405l1.apews.org
4198hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2075hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1203(union of most domain zones)
478hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
466dbl.spamhaus.org (result 127.0.1.2 = spam source)
466dbl.spamhaus.org (union of all results)
224hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
206hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
191hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
48hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
45hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
37multi.surbl.org
33fresh.spameatingmonkey.net
31dob.sibl.support-intelligence.net
22rhsbl.ahbl.org
15urired.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
15072(total number of domains tested, including 107 at SDSC)
10952hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3907hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2450(union of most domain zones)
1693dbl.spamhaus.org (union of all results)
1692dbl.spamhaus.org (result 127.0.1.2 = spam source)
1669hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1505hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1119hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1003hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
906l1.apews.org
716multi.surbl.org
450fresh.spameatingmonkey.net
439dob.sibl.support-intelligence.net
158hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
62hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
50urired.spameatingmonkey.net
23hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
20rhsbl.ahbl.org
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
6ex.dnsbl.org
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 5 January 2014.