Blacklists Compared

26 January 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, l2.apews.org, and ip.v4bl.org zones are also excluded from the union.

HitsDNS Zone
38824(total number of IP addresses tested, including 151 at SDSC)
34276(union of most IP zones)
26781b.barracudacentral.org
26251l2.apews.org
25150zen.spamhaus.org (union of all results)
23385ip.v4bl.org
23035cbl.abuseat.org
23020zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
22649bl.tiopan.com
18629bl.mailspike.net (union of all results)
18365hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
16449zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
15738bl.mailspike.net (result 127.0.0.12 = bad reputation)
15353dnsbl-1.uceprotect.net
14414spam.dnsbl.sorbs.net
14151ubl.unsubscore.com
13053hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
12275dnsbl.inps.de
10932db.wpbl.info
10776all.spamrats.com (union of all results)
10558dnsbl-2.uceprotect.net
10545dnsbl.sorbs.net (union of all results)
10301psbl.surriel.com
9884dnsbl-3.uceprotect.net
7745wl.mailspike.net (union of all results) (not a blacklist!)
6983bl.spameatingmonkey.net
6705truncate.gbudb.net
6676list.dnswl.org (not a blacklist!)
5901all.spamrats.com (result 127.0.0.36 = dialup)
5419dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
5089wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
4561all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
4471dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3810free.v4bl.org
3563hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3273bl.spamcop.net
3222bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
2797hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2507hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2335zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2330wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2272ix.dnsbl.manitu.net
2249ips.backscatterer.org
2115dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1786bl.mailspike.net (result 127.0.0.11 = very bad reputation)
1669hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1424bl.score.senderscore.com
1206bl.spamcannibal.org
1129zen.spamhaus.org (union of SBL and SBLCSS results)
875all.s5h.net
785accredit.habeas.com (not a blacklist!)
638zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
633query.bondedsender.org (not a blacklist!)
590spamsources.fabel.dk
552korea.services.net
491zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
490mail-abuse.blacklist.jippg.org
407tr.countries.nerd.dk
354all.spamrats.com (result 127.0.0.38 = spam source)
277l2.bbfh.ext.sorbs.net
196wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
185iadb.isipp.com (not a blacklist!)
174dnsbl.ahbl.org (union of all results)
153bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
148dnsbl.njabl.org (union of all results)
142hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
136dnsbl.ahbl.org (result 127.0.0.4 = spam source)
130wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
91iadb2.isipp.com (not a blacklist!)
86dnsbl.njabl.org (result 127.0.0.9 = open proxy)
40tor.dnsbl.sectoor.de (union of all results)
39tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
33dnsbl.njabl.org (result 127.0.0.2 = open relay)
29dnsbl.njabl.org (result 127.0.0.4 = spam source)
24dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
24dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
24dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
20dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
18dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
6multi.surbl.org
5dnsbl-0.uceprotect.net
4spamguard.leadmon.net (union of all results)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
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)
1multi.uribl.com (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
38824(total number of IP addresses whose names were tested, including 151 at SDSC)
21375hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16614hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6166l1.apews.org
2563hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2448hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2404(union of most domain zones)
952hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
702hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
550dbl.spamhaus.org (result 127.0.1.2 = spam source)
550dbl.spamhaus.org (union of all results)
391hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
158hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
137urired.spameatingmonkey.net
96hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
48dob.sibl.support-intelligence.net
40fresh.spameatingmonkey.net
39multi.surbl.org
27rhsbl.ahbl.org
26multi.uribl.com (union of all results)
25multi.uribl.com (result 127.0.0.2 = spam resource)
5hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1multi.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
22500(total number of domains tested, including 97 at SDSC)
19184hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3938hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3919(union of most domain zones)
3153hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2157dbl.spamhaus.org (union of all results)
2152dbl.spamhaus.org (result 127.0.1.2 = spam source)
2026hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2002hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1954hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1827multi.surbl.org
1150multi.uribl.com (union of all results)
1134multi.uribl.com (result 127.0.0.2 = spam resource)
663l1.apews.org
541urired.spameatingmonkey.net
484dob.sibl.support-intelligence.net
417fresh.spameatingmonkey.net
308hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
87hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
20rhsbl.ahbl.org
19hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
19hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
15multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10ex.dnsbl.org
5dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 28 January 2013.