Blacklists Compared

31 August 2013

[ 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
81925(total number of IP addresses tested, including 142 at SDSC)
76994(union of most IP zones)
68337b.barracudacentral.org
68251zen.spamhaus.org (union of all results)
67319l2.apews.org
61449cbl.abuseat.org
61441zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
58312bl.tiopan.com
55001dnsbl-1.uceprotect.net
54455spam.dnsbl.sorbs.net
52648hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
47392bl.mailspike.net (union of all results)
46968psbl.surriel.com
45616zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
44185hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
37632db.wpbl.info
36860dnsbl.sorbs.net (union of all results)
32476dnsbl-2.uceprotect.net
29964dnsbl-3.uceprotect.net
29869bl.spameatingmonkey.net
29069bl.mailspike.net (result 127.0.0.12 = bad reputation)
27207all.spamrats.com (union of all results)
26466dnsbl.inps.de
19510dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
17909dnsbl.sorbs.net (result 127.0.0.6 = spam source)
17759all.spamrats.com (result 127.0.0.36 = dialup)
14800bl.score.senderscore.com
13977bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
13879bl.spamcop.net
13665dnsbl.sorbs.net (result 127.0.0.10 = dialup)
12061ips.backscatterer.org
11415truncate.gbudb.net
9212all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
7282zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6257ix.dnsbl.manitu.net
6050list.dnswl.org (not a blacklist!)
5403wl.mailspike.net (union of all results) (not a blacklist!)
5023bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
4254all.s5h.net
3361wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3356hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3182hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2926bl.mailspike.net (result 127.0.0.11 = very bad reputation)
2636hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2162ubl.unsubscore.com
2124hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1793bl.spamcannibal.org
1546spamsources.fabel.dk
1521free.v4bl.org
1475zen.spamhaus.org (union of SBL and SBLCSS results)
1319wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1186tr.countries.nerd.dk
759accredit.habeas.com (not a blacklist!)
743zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
732zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
667mail-abuse.blacklist.jippg.org
625wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
620query.bondedsender.org (not a blacklist!)
361korea.services.net
354hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
320all.spamrats.com (result 127.0.0.38 = spam source)
194iadb.isipp.com (not a blacklist!)
163dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
163dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
163dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
161bl.mav.com.br
122iadb2.isipp.com (not a blacklist!)
109dnsbl.ahbl.org (union of all results)
98wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
93dnsbl.ahbl.org (result 127.0.0.4 = spam source)
92tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
92tor.dnsbl.sectoor.de (union of all results)
16dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
6dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3spamguard.leadmon.net (union of all results)
2wadb.isipp.com
2dnsbl-0.uceprotect.net
2multi.surbl.org
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
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
81925(total number of IP addresses whose names were tested, including 142 at SDSC)
44750hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
34838hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
23423l1.apews.org
6604hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2653(union of most domain zones)
2446hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1003hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
882hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
817dbl.spamhaus.org (result 127.0.1.2 = spam source)
817dbl.spamhaus.org (union of all results)
311hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
266hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
156fresh.spameatingmonkey.net
155dob.sibl.support-intelligence.net
128hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
98multi.surbl.org
55rhsbl.ahbl.org
22urired.spameatingmonkey.net
19hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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
75367(total number of domains tested, including 102 at SDSC)
67971hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3697(union of most domain zones)
3201hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2506hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2427dbl.spamhaus.org (union of all results)
2424dbl.spamhaus.org (result 127.0.1.2 = spam source)
1833hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1435hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1325hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1211multi.surbl.org
813fresh.spameatingmonkey.net
767dob.sibl.support-intelligence.net
340l1.apews.org
193hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
50hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
46urired.spameatingmonkey.net
38hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
33rhsbl.ahbl.org
13hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
5ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
3dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 2 September 2013.