Blacklists Compared

11 December 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, 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
98979(total number of IP addresses tested, including 168 at SDSC)
95362(union of most IP zones)
86966b.barracudacentral.org
85397zen.spamhaus.org (union of all results)
82539l2.apews.org
81606zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
81587cbl.abuseat.org
68560hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
65207dnsbl-1.uceprotect.net
64257bl.mailspike.net (union of all results)
55537psbl.surriel.com
53402dnsbl-2.uceprotect.net
52922zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
52431dnsbl-3.uceprotect.net
51597bl.spameatingmonkey.net
44303bl.tiopan.com
40959hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
33976spam.dnsbl.sorbs.net
33273blackholes.five-ten-sg.com (union of all results)
32441bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
28582bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
26276db.wpbl.info
25937bl.score.senderscore.com
23909bl.mailspike.net (result 127.0.0.11 = very bad reputation)
21734bl.spamcop.net
20642blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
19937dnsbl.sorbs.net (union of all results)
17101dnsbl.sorbs.net (result 127.0.0.10 = dialup)
13998ix.dnsbl.manitu.net
12998zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
12840dnsbl.inps.de
11143blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
10670mail-abuse.blacklist.jippg.org
10456no-more-funn.moensted.dk (union of all results)
9692hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
7123no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
7000bl.mailspike.net (result 127.0.0.12 = bad reputation)
5574list.dnswl.org (not a blacklist!)
3861wl.mailspike.net (union of all results) (not a blacklist!)
3606ips.backscatterer.org
3389hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3037no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2407bl.spamcannibal.org
2281wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
2259hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2178korea.services.net
2058dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
1993spamsources.fabel.dk
1753ubl.unsubscore.com
1529wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1464blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1058hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
898dnsbl.njabl.org (union of all results)
838dnsbl.sorbs.net (result 127.0.0.6 = spam source)
697dnsbl.njabl.org (result 127.0.0.9 = open proxy)
669accredit.habeas.com (not a blacklist!)
663tr.countries.nerd.dk
558query.bondedsender.org (not a blacklist!)
541l2.bbfh.ext.sorbs.net
479aspews.ext.sorbs.net
439zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
439zen.spamhaus.org (union of SBL and SBLCSS results)
382dnsbl.ahbl.org (union of all results)
330l1.bbfh.ext.sorbs.net
288dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
182no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
157iadb2.isipp.com (not a blacklist!)
155dnsbl.njabl.org (result 127.0.0.2 = open relay)
133dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
133dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
133dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
131iadb.isipp.com (not a blacklist!)
114hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
91no-more-funn.moensted.dk (result 127.0.0.9 = misc)
68dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
67tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
67tor.dnsbl.sectoor.de (union of all results)
57no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
50wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
46dnsbl.njabl.org (result 127.0.0.4 = spam source)
27bl.deadbeef.com
26dnsbl.ahbl.org (result 127.0.0.4 = spam source)
24blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
18swl.spamhaus.org (union of all results) (not a blacklist!)
13multi.surbl.org
13hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
10zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
10swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
8swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
4dnsbl-0.uceprotect.net
4spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
4spamguard.leadmon.net (union of all results)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2multi.uribl.com (union of all results)
1wadb.isipp.com
1wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
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
98979(total number of IP addresses whose names were tested, including 168 at SDSC)
59554hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
50716hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
42954(union of most domain zones)
37317abuse.rfc-ignorant.org
36869l1.apews.org
13975whois.rfc-ignorant.org (union of all results)
9975whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6015hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4188hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
4001whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1719hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
721hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
346urired.spameatingmonkey.net
242dbl.spamhaus.org
221hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
183hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
95hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
94multi.surbl.org
46rhsbl.ahbl.org
33postmaster.rfc-ignorant.org
25fresh.spameatingmonkey.net
24dob.sibl.support-intelligence.net
23multi.uribl.com (result 127.0.0.2 = spam resource)
23multi.uribl.com (union of all results)
21dsn.rfc-ignorant.org (zone not intended for this use)
19bogusmx.rfc-ignorant.org
11hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1bl.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
40579(total number of domains tested, including 148 at SDSC)
35557hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
10104(union of most domain zones)
5539hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3021whois.rfc-ignorant.org (union of all results)
2818whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2782hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2689hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2588abuse.rfc-ignorant.org
2177dbl.spamhaus.org
1883urired.spameatingmonkey.net
1715postmaster.rfc-ignorant.org
1229hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1045l1.apews.org
852hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
724multi.surbl.org
532bogusmx.rfc-ignorant.org
473multi.uribl.com (union of all results)
466multi.uribl.com (result 127.0.0.2 = spam resource)
417hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
311dsn.rfc-ignorant.org
203whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
127dob.sibl.support-intelligence.net
105fresh.spameatingmonkey.net
23rhsbl.ahbl.org
17hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
9ex.dnsbl.org
6multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
5hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
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 15 December 2010.