Blacklists Compared

22 June 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
71938(total number of IP addresses tested, including 152 at SDSC)
66955(union of most IP zones)
58566zen.spamhaus.org (union of all results)
57820l2.apews.org
57771b.barracudacentral.org
54284cbl.abuseat.org
54281zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
50052bl.tiopan.com
44663spam.dnsbl.sorbs.net
41314bl.mailspike.net (union of all results)
40263hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
39303zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
37519dnsbl-1.uceprotect.net
36796psbl.surriel.com
35386hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
32798dnsbl.sorbs.net (union of all results)
32561db.wpbl.info
27841bl.mailspike.net (result 127.0.0.12 = bad reputation)
25460bl.spameatingmonkey.net
23522dnsbl-2.uceprotect.net
22941dnsbl-3.uceprotect.net
22767all.spamrats.com (union of all results)
22419dnsbl.inps.de
19600truncate.gbudb.net
19248ubl.unsubscore.com
17480dnsbl.sorbs.net (result 127.0.0.6 = spam source)
16761dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
14836all.spamrats.com (result 127.0.0.36 = dialup)
12878dnsbl.sorbs.net (result 127.0.0.10 = dialup)
11575bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
10822bl.spamcop.net
10376bl.mav.com.br
9785ips.backscatterer.org
9027bl.score.senderscore.com
7703all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
6618wl.mailspike.net (union of all results) (not a blacklist!)
6525list.dnswl.org (not a blacklist!)
5961zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5865ix.dnsbl.manitu.net
4520bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
4100wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3644hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3175hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2798hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2134all.s5h.net
1775wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1522bl.spamcannibal.org
1511tr.countries.nerd.dk
1480spamsources.fabel.dk
1458hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1368zen.spamhaus.org (union of SBL and SBLCSS results)
797zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
792free.v4bl.org
758accredit.habeas.com (not a blacklist!)
717bl.mailspike.net (result 127.0.0.11 = very bad reputation)
649wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
626query.bondedsender.org (not a blacklist!)
571zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
501hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
435mail-abuse.blacklist.jippg.org
367korea.services.net
303all.spamrats.com (result 127.0.0.38 = spam source)
229l2.bbfh.ext.sorbs.net
209iadb.isipp.com (not a blacklist!)
148dnsbl.ahbl.org (union of all results)
102dnsbl.ahbl.org (result 127.0.0.4 = spam source)
96iadb2.isipp.com (not a blacklist!)
94wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
61dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
61dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
61dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
49tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
49tor.dnsbl.sectoor.de (union of all results)
31dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
15dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
6multi.surbl.org
4wadb.isipp.com
4dnsbl-0.uceprotect.net
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2multi.uribl.com (union of all results)
2spamguard.leadmon.net (union of all results)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
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
71938(total number of IP addresses whose names were tested, including 152 at SDSC)
42016hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
31392hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
21687l1.apews.org
6370hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2597(union of most domain zones)
2555hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
948hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
916hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
840dbl.spamhaus.org (union of all results)
839dbl.spamhaus.org (result 127.0.1.2 = spam source)
317hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
308hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
135hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
91multi.surbl.org
67fresh.spameatingmonkey.net
63multi.uribl.com (union of all results)
61multi.uribl.com (result 127.0.0.2 = spam resource)
46urired.spameatingmonkey.net
42dob.sibl.support-intelligence.net
32rhsbl.ahbl.org
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
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
68777(total number of domains tested, including 109 at SDSC)
60031hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3438hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3361(union of most domain zones)
2484hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2274dbl.spamhaus.org (union of all results)
2270dbl.spamhaus.org (result 127.0.1.2 = spam source)
1800multi.surbl.org
1483hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1409multi.uribl.com (union of all results)
1393multi.uribl.com (result 127.0.0.2 = spam resource)
1358hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1228hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
461dob.sibl.support-intelligence.net
424l1.apews.org
394fresh.spameatingmonkey.net
226hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
119urired.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)
11hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
5ex.dnsbl.org
4multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
4dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 24 June 2013.