Blacklists Compared

8 February 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
29793(total number of IP addresses tested, including 146 at SDSC)
24395(union of most IP zones)
18344l2.apews.org
18154b.barracudacentral.org
16581zen.spamhaus.org (union of all results)
16038hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
15234zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
15234cbl.abuseat.org
14105hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
13915spam.dnsbl.sorbs.net
12798bl.tiopan.com
10476dnsbl-1.uceprotect.net
9334zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
9250ubl.unsubscore.com
8535bl.mailspike.net (union of all results)
7963dnsbl.sorbs.net (union of all results)
7033bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
6706all.spamrats.com (union of all results)
6228dnsbl.inps.de
6188list.dnswl.org (not a blacklist!)
6016db.wpbl.info
5534wl.mailspike.net (union of all results) (not a blacklist!)
5492dnsbl-2.uceprotect.net
4946psbl.surriel.com
4685dnsbl-3.uceprotect.net
4573bl.spameatingmonkey.net
4487all.spamrats.com (result 127.0.0.36 = dialup)
3995bl.spamcop.net
3818dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3624truncate.gbudb.net
3269wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3251hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3093dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3059ips.backscatterer.org
2998dnsbl.sorbs.net (result 127.0.0.10 = dialup)
2777hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2146hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1996all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
1924hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1859ix.dnsbl.manitu.net
1642zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1441wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1230bl.score.senderscore.com
1175zen.spamhaus.org (union of SBL and SBLCSS results)
947bl.spamcannibal.org
747bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
743accredit.habeas.com (not a blacklist!)
742wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
677zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
670query.bondedsender.org (not a blacklist!)
621bl.mailspike.net (result 127.0.0.11 = very bad reputation)
593all.s5h.net
524bl.mailspike.net (result 127.0.0.12 = bad reputation)
503spamsources.fabel.dk
498zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
409tr.countries.nerd.dk
329korea.services.net
240all.spamrats.com (result 127.0.0.38 = spam source)
236hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
229mail-abuse.blacklist.jippg.org
192iadb.isipp.com (not a blacklist!)
120free.v4bl.org
102iadb2.isipp.com (not a blacklist!)
82wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
63dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
63dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
63dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
62bl.mav.com.br
59tor.dnsbl.sectoor.de (union of all results)
57tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
29dnsbl.ahbl.org (union of all results)
28dnsbl.ahbl.org (result 127.0.0.4 = spam source)
12spamguard.leadmon.net (union of all results)
11spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
7multi.uribl.com (result 127.0.0.2 = spam resource)
7multi.uribl.com (union of all results)
5dnsbl.sorbs.net (result 127.0.0.5 = open relay)
3multi.surbl.org
2dnsbl-0.uceprotect.net
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1wadb.isipp.com
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
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
29793(total number of IP addresses whose names were tested, including 146 at SDSC)
19545hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
16177hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
6288l1.apews.org
2377hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2336hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1374(union of most domain zones)
556dbl.spamhaus.org (result 127.0.1.2 = spam source)
556dbl.spamhaus.org (union of all results)
555hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
348hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
255hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
184hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
108hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
50fresh.spameatingmonkey.net
47multi.surbl.org
47multi.uribl.com (union of all results)
46multi.uribl.com (result 127.0.0.2 = spam resource)
37rhsbl.ahbl.org
30dob.sibl.support-intelligence.net
20urired.spameatingmonkey.net
17hostkarma.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
19686(total number of domains tested, including 101 at SDSC)
14058hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4556(union of most domain zones)
3678hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3402hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2615dbl.spamhaus.org (union of all results)
2614dbl.spamhaus.org (result 127.0.1.2 = spam source)
2289hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1451hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1346multi.uribl.com (union of all results)
1330multi.uribl.com (result 127.0.0.2 = spam resource)
1265multi.surbl.org
1201hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
604dob.sibl.support-intelligence.net
574fresh.spameatingmonkey.net
460l1.apews.org
191hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
92urired.spameatingmonkey.net
88hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
35rhsbl.ahbl.org
33hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
5multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2ex.dnsbl.org
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 9 February 2014.