Blacklists Compared

17 July 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
210201(total number of IP addresses tested, including 183 at SDSC)
207065(union of most IP zones)
194907zen.spamhaus.org (union of all results)
189953b.barracudacentral.org
177754l2.apews.org
167594cbl.abuseat.org
167592zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
145606hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
139302bl.spameatingmonkey.net
137332dnsbl-2.uceprotect.net
134755dnsbl-1.uceprotect.net
134076dnsbl-3.uceprotect.net
117691zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
113892bl.mailspike.net (union of all results)
100783dnsbl.sorbs.net (union of all results)
96894psbl.surriel.com
85937ubl.unsubscore.com
81106bl.tiopan.com
79882hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
74651spam.dnsbl.sorbs.net
59749dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
57574blackholes.five-ten-sg.com (union of all results)
55293bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
52662dnsbl.sorbs.net (result 127.0.0.10 = dialup)
50875bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
48338blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
42448bl.spamcop.net
40873db.wpbl.info
40659bl.score.senderscore.com
38047zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
26647no-more-funn.moensted.dk (union of all results)
26250ix.dnsbl.manitu.net
24833bl.mailspike.net (result 127.0.0.11 = very bad reputation)
20546bl.mailspike.net (result 127.0.0.12 = bad reputation)
20386no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
19745dnsbl.inps.de
18745mail-abuse.blacklist.jippg.org
14817hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
7967blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6434dnsbl.ahbl.org (union of all results)
5910no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
5457dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5280bl.spamcannibal.org
5264korea.services.net
4808dnsbl.ahbl.org (result 127.0.0.4 = spam source)
4174list.dnswl.org (not a blacklist!)
4137spamsources.fabel.dk
3533hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3046ips.backscatterer.org
2123wl.mailspike.net (union of all results) (not a blacklist!)
2094dnsbl.njabl.org (union of all results)
2024hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1923tr.countries.nerd.dk
1873dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1568dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1507wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1244blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1129hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
577wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
522zen.spamhaus.org (union of SBL and SBLCSS results)
514zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
503accredit.habeas.com (not a blacklist!)
462aspews.ext.sorbs.net
405query.bondedsender.org (not a blacklist!)
296no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
163tor.dnsbl.sectoor.de (union of all results)
161tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
153no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
149dnsbl.njabl.org (result 127.0.0.2 = open relay)
146hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
133iadb2.isipp.com (not a blacklist!)
104iadb.isipp.com (not a blacklist!)
103l2.bbfh.ext.sorbs.net
72dnsbl.njabl.org (result 127.0.0.4 = spam source)
63no-more-funn.moensted.dk (result 127.0.0.9 = misc)
57dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
52bl.deadbeef.com
39wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
38l1.bbfh.ext.sorbs.net
25blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
20spamguard.leadmon.net (union of all results)
18spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
17zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
13dnsbl-0.uceprotect.net
8zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
7multi.uribl.com (result 127.0.0.2 = spam resource)
7multi.surbl.org
7multi.uribl.com (union of all results)
4hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
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
210201(total number of IP addresses whose names were tested, including 183 at SDSC)
134348hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
121587hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
105157(union of most domain zones)
94984l1.apews.org
87909abuse.rfc-ignorant.org
38147whois.rfc-ignorant.org (union of all results)
27955whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
13102hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
10193whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4185hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
4036hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
564hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
370urired.spameatingmonkey.net
369dbl.spamhaus.org
313hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
180hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
69rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
69postmaster.rfc-ignorant.org
69rhsbl.sorbs.net (union of all results)
56hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
45rhsbl.ahbl.org
39dsn.rfc-ignorant.org (zone not intended for this use)
34bogusmx.rfc-ignorant.org
22hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
20multi.surbl.org
18multi.uribl.com (result 127.0.0.2 = spam resource)
18multi.uribl.com (union of all results)
16fresh.spameatingmonkey.net
14dob.sibl.support-intelligence.net
3bl.deadbeef.com
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
65282(total number of domains tested, including 160 at SDSC)
62545hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
11410(union of most domain zones)
6347hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3556whois.rfc-ignorant.org (union of all results)
3285whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2996urired.spameatingmonkey.net
2969abuse.rfc-ignorant.org
2937hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2747hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1748postmaster.rfc-ignorant.org
1702hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1580dbl.spamhaus.org
1384multi.surbl.org
1199l1.apews.org
842bogusmx.rfc-ignorant.org
665multi.uribl.com (union of all results)
655multi.uribl.com (result 127.0.0.2 = spam resource)
557hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
480hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
342dsn.rfc-ignorant.org
271whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
31hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
25rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
25rhsbl.sorbs.net (union of all results)
20hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
19hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
17rhsbl.ahbl.org
12ex.dnsbl.org
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
4fresh.spameatingmonkey.net
2dob.sibl.support-intelligence.net
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 23 July 2010.