Blacklists Compared

21 September 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
81895(total number of IP addresses tested, including 161 at SDSC)
76688(union of most IP zones)
68137b.barracudacentral.org
67631zen.spamhaus.org (union of all results)
65660l2.apews.org
61657cbl.abuseat.org
61647zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
59757bl.tiopan.com
53297spam.dnsbl.sorbs.net
50779hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
49966dnsbl-1.uceprotect.net
47661hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
44403bl.mailspike.net (union of all results)
43295psbl.surriel.com
43159zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
38765db.wpbl.info
37448dnsbl.sorbs.net (union of all results)
29986bl.spameatingmonkey.net
27934all.spamrats.com (union of all results)
26983bl.mailspike.net (result 127.0.0.12 = bad reputation)
25463dnsbl-2.uceprotect.net
25276dnsbl.inps.de
24737dnsbl-3.uceprotect.net
23384ubl.unsubscore.com
21001truncate.gbudb.net
20174dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
18848all.spamrats.com (result 127.0.0.36 = dialup)
17869dnsbl.sorbs.net (result 127.0.0.6 = spam source)
16258bl.spamcop.net
14775dnsbl.sorbs.net (result 127.0.0.10 = dialup)
11073ips.backscatterer.org
11049bl.mailspike.net (result 127.0.0.11 = very bad reputation)
8709all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
8434ix.dnsbl.manitu.net
7402zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
7212bl.score.senderscore.com
6376list.dnswl.org (not a blacklist!)
5317wl.mailspike.net (union of all results) (not a blacklist!)
5278bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
4649bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
3876all.s5h.net
3564wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3532hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3404hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3092hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2630hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2023zen.spamhaus.org (union of SBL and SBLCSS results)
1724bl.spamcannibal.org
1560spamsources.fabel.dk
1452wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1266free.v4bl.org
1220zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1022tr.countries.nerd.dk
803zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
737accredit.habeas.com (not a blacklist!)
624query.bondedsender.org (not a blacklist!)
619mail-abuse.blacklist.jippg.org
460all.spamrats.com (result 127.0.0.38 = spam source)
380korea.services.net
274wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
202iadb.isipp.com (not a blacklist!)
184bl.mav.com.br
175dnsbl.ahbl.org (union of all results)
168hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
152dnsbl.ahbl.org (result 127.0.0.4 = spam source)
144iadb2.isipp.com (not a blacklist!)
123dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
123dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
123dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
97tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
97tor.dnsbl.sectoor.de (union of all results)
27wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
23dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
11dnsbl-0.uceprotect.net
6dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2multi.surbl.org
1wadb.isipp.com
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1spamguard.leadmon.net (union of all results)
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
81895(total number of IP addresses whose names were tested, including 161 at SDSC)
48869hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
39609hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
25837l1.apews.org
6498hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3340(union of most domain zones)
2606hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1430dbl.spamhaus.org (result 127.0.1.2 = spam source)
1430dbl.spamhaus.org (union of all results)
1221hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1088hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
471hostkarma.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)
195multi.surbl.org
111fresh.spameatingmonkey.net
107dob.sibl.support-intelligence.net
102hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
56rhsbl.ahbl.org
24urired.spameatingmonkey.net
7hostkarma.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
21643(total number of domains tested, including 130 at SDSC)
16806hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5359hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4826(union of most domain zones)
3222hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2865dbl.spamhaus.org (union of all results)
2863dbl.spamhaus.org (result 127.0.1.2 = spam source)
1729hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1515hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1465hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1161l1.apews.org
1000multi.surbl.org
967dob.sibl.support-intelligence.net
889fresh.spameatingmonkey.net
245hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
67urired.spameatingmonkey.net
42hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
36rhsbl.ahbl.org
17hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
14hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
7ex.dnsbl.org
4hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 23 September 2013.