Blacklists Compared

20 March 2010

[ 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, and wl.mailspike.net zones because they are not blacklists. Because it is too aggressive to be widely useful the l2.apews.org zone is also excluded from the union.

HitsDNS Zone
192938(total number of IP addresses tested, including 179 at SDSC)
189354(union of most IP zones)
180028b.barracudacentral.org
178108zen.spamhaus.org (union of all results)
161524l2.apews.org
154980zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
154980cbl.abuseat.org
138915dnsbl-1.uceprotect.net
137196hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
129997dnsbl-2.uceprotect.net
125627dnsbl-3.uceprotect.net
120325dnsbl.sorbs.net (union of all results)
112999psbl.surriel.com
108173bl.mailspike.net (union of all results)
107927zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
99996ubl.unsubscore.com
92270dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
86520hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
60001bl.spameatingmonkey.net
57578spam.dnsbl.sorbs.net
54108bl.mailspike.net (result 127.0.0.12 = bad reputation)
43597blackholes.five-ten-sg.com (union of all results)
42493dnsbl.sorbs.net (result 127.0.0.10 = dialup)
40316bl.spamcop.net
39402blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
37104no-more-funn.moensted.dk (union of all results)
33916db.wpbl.info
32895zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
30529bl.tiopan.com
27020bl.mailspike.net (result 127.0.0.11 = very bad reputation)
26669no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
25848ix.dnsbl.manitu.net
25331bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
22127bl.score.senderscore.com
18161mail-abuse.blacklist.jippg.org
16992bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
11826dnsbl.inps.de
11337hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8415no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
8025korea.services.net
6305bl.spamcannibal.org
5636dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4745dnsbl.ahbl.org (union of all results)
4649dnsbl.ahbl.org (result 127.0.0.4 = spam source)
4475list.dnswl.org (not a blacklist!)
4202spamsources.fabel.dk
3226blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2911wl.mailspike.net (union of all results) (not a blacklist!)
2862hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2675ips.backscatterer.org
2606tr.countries.nerd.dk
2253wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2036hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1891dnsbl.njabl.org (union of all results)
1634dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1355no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1325hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
961blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
658wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
631no-more-funn.moensted.dk (result 127.0.0.9 = misc)
461zen.spamhaus.org (union of SBL and SBLCSS results)
459accredit.habeas.com (not a blacklist!)
447aspews.ext.sorbs.net
414zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
389query.bondedsender.org (not a blacklist!)
190dnsbl.njabl.org (result 127.0.0.2 = open relay)
160l2.bbfh.ext.sorbs.net
141iadb2.isipp.com (not a blacklist!)
116tor.dnsbl.sectoor.de (union of all results)
114tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
96dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
93iadb.isipp.com (not a blacklist!)
88no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
67dnsbl.njabl.org (result 127.0.0.4 = spam source)
59hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
47zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
43l1.bbfh.ext.sorbs.net
36dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
32bl.deadbeef.com
25dnsbl-0.uceprotect.net
23dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
9zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
8multi.uribl.com (result 127.0.0.2 = spam resource)
8blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
8multi.uribl.com (union of all results)
6spamguard.leadmon.net (union of all results)
5multi.surbl.org
5spamguard.leadmon.net (result 127.0.0.8 = open proxy)
5hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2blackholes.brainerd.net
1wadb.isipp.com
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)

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
192938(total number of IP addresses whose names were tested, including 179 at SDSC)
115163hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
103693hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
96511(union of most domain zones)
82651l1.apews.org
76872abuse.rfc-ignorant.org
35484whois.rfc-ignorant.org (union of all results)
30007dynamic.rhs.mailpolice.com
27728whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
11180hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
7757whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4147webmail.rhs.mailpolice.com
3097hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1417hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
858adv.rhs.mailpolice.com
468hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
408urired.spameatingmonkey.net
295hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
295dbl.spamhaus.org
140rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
140rhsbl.sorbs.net (union of all results)
113hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
79hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
72multi.uribl.com (result 127.0.0.2 = spam resource)
72multi.uribl.com (union of all results)
57postmaster.rfc-ignorant.org
43bulk.rhs.mailpolice.com
40multi.surbl.org
38dsn.rfc-ignorant.org (zone not intended for this use)
34rhsbl.ahbl.org
31fresh.spameatingmonkey.net
28dob.sibl.support-intelligence.net
24bogusmx.rfc-ignorant.org
11porn.rhs.mailpolice.com
4bl.deadbeef.com
3hostkarma.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
76995(total number of domains tested, including 166 at SDSC)
74709hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
12414(union of most domain zones)
6406hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4042whois.rfc-ignorant.org (union of all results)
3815whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3585urired.spameatingmonkey.net
3348hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2741abuse.rfc-ignorant.org
1954hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1682postmaster.rfc-ignorant.org
1335bogusmx.rfc-ignorant.org
1137l1.apews.org
866hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
733dbl.spamhaus.org
705multi.surbl.org
632webmail.rhs.mailpolice.com
623multi.uribl.com (union of all results)
612multi.uribl.com (result 127.0.0.2 = spam resource)
455hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
333dsn.rfc-ignorant.org
262adv.rhs.mailpolice.com
227whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
186porn.rhs.mailpolice.com
107hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
58bulk.rhs.mailpolice.com
28hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
25fresh.spameatingmonkey.net
24hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
19rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
19dob.sibl.support-intelligence.net
19rhsbl.sorbs.net (union of all results)
18rhsbl.ahbl.org
11hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
11ex.dnsbl.org
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
9dynamic.rhs.mailpolice.com
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2fraud.rhs.mailpolice.com
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1bl.deadbeef.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 24 March 2010.