Blacklists Compared

17 November 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, l2.apews.org, and ip.v4bl.org zones are also excluded from the union.

HitsDNS Zone
41405(total number of IP addresses tested, including 139 at SDSC)
36625(union of most IP zones)
28853l2.apews.org
28470b.barracudacentral.org
27766zen.spamhaus.org (union of all results)
26528zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
26526cbl.abuseat.org
26514ip.v4bl.org
25513bl.tiopan.com
21103hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
19828bl.mailspike.net (union of all results)
19432hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
17818dnsbl-1.uceprotect.net
16962zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
16032bl.mailspike.net (result 127.0.0.12 = bad reputation)
13262dnsbl-2.uceprotect.net
12604ubl.unsubscore.com
12570dnsbl.sorbs.net (union of all results)
12332dnsbl-3.uceprotect.net
11945all.spamrats.com (union of all results)
10485wl.mailspike.net (union of all results) (not a blacklist!)
10412psbl.surriel.com
9462bl.spameatingmonkey.net
9400dnsbl.inps.de
9225dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
9045spam.dnsbl.sorbs.net
6604wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
6564list.dnswl.org (not a blacklist!)
6005all.spamrats.com (result 127.0.0.36 = dialup)
5549all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
5433db.wpbl.info
4240bl.spamcop.net
4118dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3695truncate.gbudb.net
3194free.v4bl.org
3091bl.mailspike.net (result 127.0.0.11 = very bad reputation)
3002wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2732hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2730ix.dnsbl.manitu.net
2653hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2640zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2362bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
2010ips.backscatterer.org
1801hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1708hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1525bl.score.senderscore.com
1364bl.spamcannibal.org
1308mail-abuse.blacklist.jippg.org
1276zen.spamhaus.org (union of SBL and SBLCSS results)
923all.s5h.net
847zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
832accredit.habeas.com (not a blacklist!)
720korea.services.net
719spamsources.fabel.dk
685query.bondedsender.org (not a blacklist!)
678wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
585tr.countries.nerd.dk
430all.spamrats.com (result 127.0.0.38 = spam source)
429zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
316l2.bbfh.ext.sorbs.net
253aspews.ext.sorbs.net
249iadb.isipp.com (not a blacklist!)
202wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
194dnsbl.njabl.org (union of all results)
193dnsbl.ahbl.org (union of all results)
190bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
151dnsbl.njabl.org (result 127.0.0.9 = open proxy)
147dnsbl.ahbl.org (result 127.0.0.4 = spam source)
130hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
129iadb2.isipp.com (not a blacklist!)
34dnsbl.sorbs.net (result 127.0.0.6 = spam source)
34dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
33tor.dnsbl.sectoor.de (union of all results)
31tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
31dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
31dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
31dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
26dnsbl.njabl.org (result 127.0.0.2 = open relay)
17dnsbl.njabl.org (result 127.0.0.4 = spam source)
16dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
12dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
11multi.surbl.org
6hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1dnsbl-0.uceprotect.net
1swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
1multi.uribl.com (union of all results)
1swl.spamhaus.org (union of all results) (not a blacklist!)
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
41405(total number of IP addresses whose names were tested, including 139 at SDSC)
21594hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
17148hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6735l1.apews.org
2925hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2732hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1517(union of most domain zones)
423hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
414hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
369dbl.spamhaus.org (result 127.0.1.2 = spam source)
369dbl.spamhaus.org (union of all results)
306hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
220hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
150urired.spameatingmonkey.net
112hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
41multi.uribl.com (result 127.0.0.2 = spam resource)
41multi.uribl.com (union of all results)
33multi.surbl.org
29rhsbl.ahbl.org
10hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
9fresh.spameatingmonkey.net
7dob.sibl.support-intelligence.net
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
26723(total number of domains tested, including 90 at SDSC)
23460hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4043hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3789(union of most domain zones)
2795hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2167dbl.spamhaus.org (union of all results)
2164dbl.spamhaus.org (result 127.0.1.2 = spam source)
2147hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2094hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1507hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1323multi.surbl.org
1179multi.uribl.com (union of all results)
1161multi.uribl.com (result 127.0.0.2 = spam resource)
656fresh.spameatingmonkey.net
656dob.sibl.support-intelligence.net
622urired.spameatingmonkey.net
583l1.apews.org
319hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
34hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
24hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
17hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
17rhsbl.ahbl.org
16multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
5ex.dnsbl.org
3dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 19 November 2012.