Blacklists Compared

19 April 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
35792(total number of IP addresses tested, including 216 at SDSC)
31007(union of most IP zones)
24091l2.apews.org
24027b.barracudacentral.org
22402zen.spamhaus.org (union of all results)
20336cbl.abuseat.org
20333zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
19408spam.dnsbl.sorbs.net
18176hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
17789hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
15698bl.tiopan.com
15552ubl.unsubscore.com
14997dnsbl-1.uceprotect.net
14050psbl.surriel.com
12341zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
10779dnsbl.inps.de
10024bl.mailspike.net (union of all results)
9340db.wpbl.info
8842dnsbl.sorbs.net (union of all results)
7665all.spamrats.com (union of all results)
7401bl.spameatingmonkey.net
6449dnsbl-2.uceprotect.net
6061list.dnswl.org (not a blacklist!)
6001bl.mailspike.net (result 127.0.0.12 = bad reputation)
5563wl.mailspike.net (union of all results) (not a blacklist!)
5394all.spamrats.com (result 127.0.0.36 = dialup)
5385bl.spamcop.net
4880dnsbl-3.uceprotect.net
4500dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
4216dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3181hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3060wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2957ips.backscatterer.org
2935bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
2761ix.dnsbl.manitu.net
2682hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2543hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2342zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
2087truncate.gbudb.net
2002all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
1675zen.spamhaus.org (union of SBL and SBLCSS results)
1591wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1517hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1400bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1363bl.spamcannibal.org
1236dnsbl.sorbs.net (result 127.0.0.6 = spam source)
989all.s5h.net
941zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
860wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
734zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
722accredit.habeas.com (not a blacklist!)
711spamsources.fabel.dk
657query.bondedsender.org (not a blacklist!)
584bl.score.senderscore.com
549korea.services.net
525mail-abuse.blacklist.jippg.org
523tr.countries.nerd.dk
439bl.mailspike.net (result 127.0.0.11 = very bad reputation)
293all.spamrats.com (result 127.0.0.38 = spam source)
221hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
158iadb.isipp.com (not a blacklist!)
140free.v4bl.org
92dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
92dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
92dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
79iadb2.isipp.com (not a blacklist!)
71bl.mav.com.br
52wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
41tor.dnsbl.sectoor.de (union of all results)
39tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
9multi.uribl.com (result 127.0.0.2 = spam resource)
9multi.uribl.com (union of all results)
6dnsbl-0.uceprotect.net
5spamguard.leadmon.net (union of all results)
4multi.surbl.org
4spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
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
35792(total number of IP addresses whose names were tested, including 216 at SDSC)
23028hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
18836hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
8761l1.apews.org
2698hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2375hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1721(union of most domain zones)
808dbl.spamhaus.org (result 127.0.1.2 = spam source)
808dbl.spamhaus.org (union of all results)
655hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
444hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
320hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
152hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
87multi.uribl.com (result 127.0.0.2 = spam resource)
87multi.uribl.com (union of all results)
78hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
70multi.surbl.org
34dob.sibl.support-intelligence.net
25urired.spameatingmonkey.net
20fresh.spameatingmonkey.net
19hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
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
26534(total number of domains tested, including 186 at SDSC)
19279hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4251hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3955(union of most domain zones)
2753dbl.spamhaus.org (union of all results)
2751dbl.spamhaus.org (result 127.0.1.2 = spam source)
2504hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2482hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1886multi.uribl.com (union of all results)
1871multi.uribl.com (result 127.0.0.2 = spam resource)
1653multi.surbl.org
1495hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1445hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
736l1.apews.org
639dob.sibl.support-intelligence.net
511fresh.spameatingmonkey.net
195hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
82urired.spameatingmonkey.net
37hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
14hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
6ex.dnsbl.org
5multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2hostkarma.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 21 April 2014.