Blacklists Compared

18 May 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 and l2.apews.org zones are also excluded from the union.

HitsDNS Zone
59183(total number of IP addresses tested, including 176 at SDSC)
54140(union of most IP zones)
45446l2.apews.org
44831b.barracudacentral.org
44656zen.spamhaus.org (union of all results)
42173bl.mailspike.net (union of all results)
42143cbl.abuseat.org
42136zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
37720bl.tiopan.com
33392hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
32520bl.mailspike.net (result 127.0.0.12 = bad reputation)
31002spam.dnsbl.sorbs.net
29941zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
25569hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
24460dnsbl-1.uceprotect.net
22202dnsbl.sorbs.net (union of all results)
20755psbl.surriel.com
18921truncate.gbudb.net
18421all.spamrats.com (union of all results)
18230db.wpbl.info
17604dnsbl-3.uceprotect.net
17418dnsbl-2.uceprotect.net
16658ubl.unsubscore.com
15165dnsbl.inps.de
14977bl.spameatingmonkey.net
11455all.spamrats.com (result 127.0.0.36 = dialup)
10549dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
10121ips.backscatterer.org
10010dnsbl.sorbs.net (result 127.0.0.6 = spam source)
9043dnsbl.sorbs.net (result 127.0.0.10 = dialup)
8265bl.spamcop.net
6969bl.score.senderscore.com
6823wl.mailspike.net (union of all results) (not a blacklist!)
6676all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
6344list.dnswl.org (not a blacklist!)
4761bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
4754ix.dnsbl.manitu.net
4645bl.mailspike.net (result 127.0.0.11 = very bad reputation)
4583wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
4469zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4357hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3808bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
3303hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2685hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2125bl.mav.com.br
1906wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1604hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1588bl.spamcannibal.org
1417free.v4bl.org
1193spamsources.fabel.dk
1017tr.countries.nerd.dk
922zen.spamhaus.org (union of SBL and SBLCSS results)
712accredit.habeas.com (not a blacklist!)
596query.bondedsender.org (not a blacklist!)
539mail-abuse.blacklist.jippg.org
514zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
408zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
348all.spamrats.com (result 127.0.0.38 = spam source)
334korea.services.net
252wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
244l2.bbfh.ext.sorbs.net
207iadb.isipp.com (not a blacklist!)
174all.s5h.net
149dnsbl.ahbl.org (union of all results)
148hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
117dnsbl.ahbl.org (result 127.0.0.4 = spam source)
84iadb2.isipp.com (not a blacklist!)
82wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
45dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
45dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
45dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
31tor.dnsbl.sectoor.de (union of all results)
30tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
23dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
9dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
6dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
6hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5multi.surbl.org
4wadb.isipp.com
4dnsbl-0.uceprotect.net
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2spamguard.leadmon.net (union of all results)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
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
59183(total number of IP addresses whose names were tested, including 176 at SDSC)
33639hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
25424hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
14580l1.apews.org
4646hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2772hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2701(union of most domain zones)
934dbl.spamhaus.org (result 127.0.1.2 = spam source)
934dbl.spamhaus.org (union of all results)
890hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
863hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
382hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
278hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
144hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
76multi.surbl.org
64multi.uribl.com (result 127.0.0.2 = spam resource)
64multi.uribl.com (union of all results)
55dob.sibl.support-intelligence.net
47fresh.spameatingmonkey.net
29urired.spameatingmonkey.net
20rhsbl.ahbl.org
16hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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
35327(total number of domains tested, including 133 at SDSC)
23848hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3661hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3040(union of most domain zones)
2077dbl.spamhaus.org (union of all results)
2076dbl.spamhaus.org (result 127.0.1.2 = spam source)
1979hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1634hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1429hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1335multi.uribl.com (union of all results)
1322multi.uribl.com (result 127.0.0.2 = spam resource)
1218multi.surbl.org
1200hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
582l1.apews.org
532dob.sibl.support-intelligence.net
231hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
90urired.spameatingmonkey.net
18hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
17rhsbl.ahbl.org
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
9hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
8hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
6ex.dnsbl.org
5fresh.spameatingmonkey.net
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 20 May 2013.