Blacklists Compared

6 July 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
66690(total number of IP addresses tested, including 146 at SDSC)
61793(union of most IP zones)
54575zen.spamhaus.org (union of all results)
53999l2.apews.org
52678b.barracudacentral.org
51515cbl.abuseat.org
51511zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
45724bl.tiopan.com
40795spam.dnsbl.sorbs.net
38502hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
37522bl.mailspike.net (union of all results)
35694zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
35660dnsbl-1.uceprotect.net
35167hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
30264db.wpbl.info
29331dnsbl.sorbs.net (union of all results)
27977psbl.surriel.com
23521bl.spameatingmonkey.net
22543bl.mailspike.net (result 127.0.0.12 = bad reputation)
21523dnsbl-2.uceprotect.net
20964all.spamrats.com (union of all results)
20674truncate.gbudb.net
20512dnsbl-3.uceprotect.net
19999dnsbl.inps.de
17942ubl.unsubscore.com
15266bl.score.senderscore.com
14971dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
14575dnsbl.sorbs.net (result 127.0.0.6 = spam source)
13563all.spamrats.com (result 127.0.0.36 = dialup)
11859bl.spamcop.net
10921dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10326ips.backscatterer.org
9012bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
7202all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
7051ix.dnsbl.manitu.net
5739list.dnswl.org (not a blacklist!)
5649zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5429wl.mailspike.net (union of all results) (not a blacklist!)
4910bl.mailspike.net (result 127.0.0.11 = very bad reputation)
4152hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3743bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
3345wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3100hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2275hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2087hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1686all.s5h.net
1437wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1437spamsources.fabel.dk
1427bl.spamcannibal.org
1280tr.countries.nerd.dk
1154zen.spamhaus.org (union of SBL and SBLCSS results)
753hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
742accredit.habeas.com (not a blacklist!)
652free.v4bl.org
624zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
608query.bondedsender.org (not a blacklist!)
573wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
542bl.mav.com.br
530zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
454korea.services.net
409mail-abuse.blacklist.jippg.org
257all.spamrats.com (result 127.0.0.38 = spam source)
192iadb.isipp.com (not a blacklist!)
104iadb2.isipp.com (not a blacklist!)
94dnsbl.ahbl.org (union of all results)
75dnsbl.ahbl.org (result 127.0.0.4 = spam source)
74wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
57dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
57dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
57dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
34tor.dnsbl.sectoor.de (union of all results)
33tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
19dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
9dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
7multi.surbl.org
3multi.uribl.com (result 127.0.0.2 = spam resource)
3spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
3hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3multi.uribl.com (union of all results)
3spamguard.leadmon.net (union of all results)
2wadb.isipp.com
2dnsbl-0.uceprotect.net
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor 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
66690(total number of IP addresses whose names were tested, including 146 at SDSC)
38310hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
28684hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
19414l1.apews.org
5690hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2488(union of most domain zones)
2420hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
934hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
845hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
787dbl.spamhaus.org (result 127.0.1.2 = spam source)
787dbl.spamhaus.org (union of all results)
350hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
229hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
105multi.surbl.org
89hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
71multi.uribl.com (union of all results)
70multi.uribl.com (result 127.0.0.2 = spam resource)
39dob.sibl.support-intelligence.net
37fresh.spameatingmonkey.net
31rhsbl.ahbl.org
27urired.spameatingmonkey.net
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
59108(total number of domains tested, including 107 at SDSC)
49697hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3008hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2265(union of most domain zones)
1428hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1365dbl.spamhaus.org (union of all results)
1360dbl.spamhaus.org (result 127.0.1.2 = spam source)
1353hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1317hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
972multi.surbl.org
916multi.uribl.com (union of all results)
903multi.uribl.com (result 127.0.0.2 = spam resource)
702hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
395l1.apews.org
242dob.sibl.support-intelligence.net
231hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
162fresh.spameatingmonkey.net
123urired.spameatingmonkey.net
28hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
24rhsbl.ahbl.org
12multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
5dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
4ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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 8 July 2013.