Blacklists Compared

18 August 2012

[ 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
59965(total number of IP addresses tested, including 162 at SDSC)
56244(union of most IP zones)
47623b.barracudacentral.org
47576l2.apews.org
47179zen.spamhaus.org (union of all results)
46127zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
46126cbl.abuseat.org
44053ip.v4bl.org
41165bl.tiopan.com
37098bl.mailspike.net (union of all results)
33380hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
32310zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
30796bl.mailspike.net (result 127.0.0.12 = bad reputation)
28981dnsbl-1.uceprotect.net
26797hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
26091dnsbl-3.uceprotect.net
24334dnsbl-2.uceprotect.net
22164all.spamrats.com (union of all results)
19720bl.spameatingmonkey.net
17190psbl.surriel.com
16172ubl.unsubscore.com
15441dnsbl.sorbs.net (union of all results)
13429spam.dnsbl.sorbs.net
12770all.spamrats.com (result 127.0.0.36 = dialup)
9730truncate.gbudb.net
9613wl.mailspike.net (union of all results) (not a blacklist!)
9608dnsbl.sorbs.net (result 127.0.0.10 = dialup)
9164all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
7600dnsbl.inps.de
6710bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
6501dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6332list.dnswl.org (not a blacklist!)
6081wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
5484zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5198db.wpbl.info
5035bl.mailspike.net (result 127.0.0.11 = very bad reputation)
4715bl.spamcop.net
3101hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3039hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2735wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2629bl.score.senderscore.com
2494hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2399ix.dnsbl.manitu.net
2154all.s5h.net
1806ips.backscatterer.org
1475hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1268tr.countries.nerd.dk
1165mail-abuse.blacklist.jippg.org
1124bl.spamcannibal.org
917spamsources.fabel.dk
744accredit.habeas.com (not a blacklist!)
709korea.services.net
688zen.spamhaus.org (union of SBL and SBLCSS results)
625query.bondedsender.org (not a blacklist!)
563wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
374zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
369dnsbl.njabl.org (union of all results)
368all.spamrats.com (result 127.0.0.38 = spam source)
331dnsbl.njabl.org (result 127.0.0.9 = open proxy)
325bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
314zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
299l2.bbfh.ext.sorbs.net
267aspews.ext.sorbs.net
241wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
233iadb.isipp.com (not a blacklist!)
225hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
193dnsbl.ahbl.org (union of all results)
133dnsbl.ahbl.org (result 127.0.0.4 = spam source)
65iadb2.isipp.com (not a blacklist!)
60dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
60dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
60dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
53tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
53tor.dnsbl.sectoor.de (union of all results)
41dnsbl.sorbs.net (result 127.0.0.6 = spam source)
35dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
25dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
21dnsbl.njabl.org (result 127.0.0.2 = open relay)
18hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
17dnsbl.njabl.org (result 127.0.0.4 = spam source)
4spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
4swl.spamhaus.org (union of all results) (not a blacklist!)
4spamguard.leadmon.net (union of all results)
3dnsbl-0.uceprotect.net
3swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
3multi.surbl.org
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
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
59965(total number of IP addresses whose names were tested, including 162 at SDSC)
32274hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
27775hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
21486(union of most domain zones)
17899abuse.rfc-ignorant.org
15768l1.apews.org
9225whois.rfc-ignorant.org (union of all results)
7634whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3794hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2896hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1591whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
447hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
436hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
410dbl.spamhaus.org (union of all results)
409dbl.spamhaus.org (result 127.0.1.2 = spam source)
384hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
150hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
111urired.spameatingmonkey.net
74hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
39bogusmx.rfc-ignorant.org
38rhsbl.ahbl.org
24multi.uribl.com (result 127.0.0.2 = spam resource)
24postmaster.rfc-ignorant.org
24multi.uribl.com (union of all results)
23multi.surbl.org
15dob.sibl.support-intelligence.net
10fresh.spameatingmonkey.net
5hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
3dsn.rfc-ignorant.org (zone not intended for this use)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
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
42705(total number of domains tested, including 98 at SDSC)
38973hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
8414(union of most domain zones)
3953hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3547whois.rfc-ignorant.org (union of all results)
3405whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2162hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2096hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2096hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1819dbl.spamhaus.org (result 127.0.1.2 = spam source)
1819dbl.spamhaus.org (union of all results)
1525abuse.rfc-ignorant.org
1497hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
974multi.surbl.org
945multi.uribl.com (union of all results)
928multi.uribl.com (result 127.0.0.2 = spam resource)
781postmaster.rfc-ignorant.org
740bogusmx.rfc-ignorant.org
540l1.apews.org
324urired.spameatingmonkey.net
287hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
241fresh.spameatingmonkey.net
222dsn.rfc-ignorant.org
216dob.sibl.support-intelligence.net
142whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
50hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
23rhsbl.ahbl.org
20hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
17hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
15multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 21 August 2012.