Blacklists Compared

21 June 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
35775(total number of IP addresses tested, including 186 at SDSC)
31256(union of most IP zones)
24177b.barracudacentral.org
22536zen.spamhaus.org (union of all results)
20455cbl.abuseat.org
20026zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
18936ubl.unsubscore.com
17982spam.dnsbl.sorbs.net
17742hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
15883all.s5h.net
15534dnsbl-1.uceprotect.net
15508hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
13987zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
13975bl.tiopan.com
12970l2.apews.org
11116dnsbl.sorbs.net (union of all results)
10516psbl.surriel.com
9895dnsbl-2.uceprotect.net
9436all.spamrats.com (union of all results)
9115db.wpbl.info
8650dnsbl.inps.de
8531bl.mailspike.net (union of all results)
7975dnsbl-3.uceprotect.net
6351list.dnswl.org (not a blacklist!)
6063dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5706all.spamrats.com (result 127.0.0.36 = dialup)
5688bl.spameatingmonkey.net
5625wl.mailspike.net (union of all results) (not a blacklist!)
5473bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
5394bl.spamcop.net
4911ips.backscatterer.org
4841truncate.gbudb.net
4597dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3713dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3384all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3377bl.score.senderscore.com
3235hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3062wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2988ix.dnsbl.manitu.net
2593hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2456hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2367hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2221zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1716bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1636zen.spamhaus.org (union of SBL and SBLCSS results)
1524wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1473bl.spamcannibal.org
1318bl.mailspike.net (result 127.0.0.11 = very bad reputation)
990zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
976mail-abuse.blacklist.jippg.org
938wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
762accredit.habeas.com (not a blacklist!)
760spamsources.fabel.dk
675query.bondedsender.org (not a blacklist!)
650bl.mailspike.net (result 127.0.0.12 = bad reputation)
646zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
585korea.services.net
572free.v4bl.org
391all.spamrats.com (result 127.0.0.38 = spam source)
268tr.countries.nerd.dk
151iadb.isipp.com (not a blacklist!)
110hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
101wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
77dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
77dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
77dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
67iadb2.isipp.com (not a blacklist!)
64bl.mav.com.br
24tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
24tor.dnsbl.sectoor.de (union of all results)
19multi.uribl.com (result 127.0.0.2 = spam resource)
19multi.uribl.com (union of all results)
9spamguard.leadmon.net (union of all results)
8spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
4dnsbl-0.uceprotect.net
3multi.surbl.org
3dnsbl.sorbs.net (result 127.0.0.5 = open relay)
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
35775(total number of IP addresses whose names were tested, including 186 at SDSC)
20387hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
15809hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3692l1.apews.org
2550hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2407(union of most domain zones)
2277hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1004hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
907hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
812dbl.spamhaus.org (result 127.0.1.2 = spam source)
812dbl.spamhaus.org (union of all results)
394hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
132multi.surbl.org
119multi.uribl.com (union of all results)
117multi.uribl.com (result 127.0.0.2 = spam resource)
116hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
84hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
64fresh.spameatingmonkey.net
63dob.sibl.support-intelligence.net
42hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
13urired.spameatingmonkey.net
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
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
27110(total number of domains tested, including 155 at SDSC)
15343hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4557(union of most domain zones)
3654hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3367hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
3135dbl.spamhaus.org (result 127.0.1.2 = spam source)
3135dbl.spamhaus.org (union of all results)
2658hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2054multi.uribl.com (union of all results)
2038multi.uribl.com (result 127.0.0.2 = spam resource)
2019multi.surbl.org
1396hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1323hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1071dob.sibl.support-intelligence.net
1018fresh.spameatingmonkey.net
206hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
101urired.spameatingmonkey.net
46l1.apews.org
15hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
14hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
12hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
6multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
5ex.dnsbl.org
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 23 June 2014.