Blacklists Compared

29 January 2011

[ 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
82905(total number of IP addresses tested, including 163 at SDSC)
79763(union of most IP zones)
71198b.barracudacentral.org
69712zen.spamhaus.org (union of all results)
68414l2.apews.org
67675zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
67674cbl.abuseat.org
57811hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
54277bl.mailspike.net (union of all results)
51801dnsbl-1.uceprotect.net
45405psbl.surriel.com
44041bl.spameatingmonkey.net
43265zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
43073bl.tiopan.com
42661dnsbl-3.uceprotect.net
42511dnsbl-2.uceprotect.net
36596ubl.unsubscore.com
35954hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
30475spam.dnsbl.sorbs.net
25804bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
25790blackholes.five-ten-sg.com (union of all results)
23566bl.mailspike.net (result 127.0.0.11 = very bad reputation)
22224bl.score.senderscore.com
21879db.wpbl.info
19544dnsbl.sorbs.net (union of all results)
17055bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
16565bl.spamcop.net
14284blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
13389dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10173blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
9987ix.dnsbl.manitu.net
9965dnsbl.inps.de
9696bl.mailspike.net (result 127.0.0.12 = bad reputation)
9400zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
8881no-more-funn.moensted.dk (union of all results)
7381mail-abuse.blacklist.jippg.org
6347hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
6197no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
4988list.dnswl.org (not a blacklist!)
4059ips.backscatterer.org
3464dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3459wl.mailspike.net (union of all results) (not a blacklist!)
3228dnsbl.sorbs.net (result 127.0.0.6 = spam source)
3161hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2489wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2458no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2023hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1863bl.spamcannibal.org
1666hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1450korea.services.net
1408spamsources.fabel.dk
1308blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
958wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
936l2.bbfh.ext.sorbs.net
744dnsbl.njabl.org (union of all results)
619dnsbl.njabl.org (result 127.0.0.9 = open proxy)
597accredit.habeas.com (not a blacklist!)
587tr.countries.nerd.dk
522query.bondedsender.org (not a blacklist!)
379aspews.ext.sorbs.net
326dnsbl.ahbl.org (union of all results)
311l1.bbfh.ext.sorbs.net
288zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
288zen.spamhaus.org (union of SBL and SBLCSS results)
236dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
126hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
115iadb2.isipp.com (not a blacklist!)
113dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
113dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
113dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
107no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
91no-more-funn.moensted.dk (result 127.0.0.9 = misc)
90iadb.isipp.com (not a blacklist!)
89dnsbl.njabl.org (result 127.0.0.2 = open relay)
73dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
69tor.dnsbl.sectoor.de (union of all results)
68tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
56no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
36dnsbl.njabl.org (result 127.0.0.4 = spam source)
25blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
22bl.deadbeef.com
20swl.spamhaus.org (union of all results) (not a blacklist!)
17dnsbl.ahbl.org (result 127.0.0.4 = spam source)
16multi.surbl.org
12wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
11zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
11swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
9swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
6hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6spamguard.leadmon.net (union of all results)
5spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
4dnsbl-0.uceprotect.net
1multi.uribl.com (result 127.0.0.2 = spam resource)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1multi.uribl.com (union of all results)
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
82905(total number of IP addresses whose names were tested, including 163 at SDSC)
52047hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
43981hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
37871(union of most domain zones)
32183abuse.rfc-ignorant.org
31081l1.apews.org
11495whois.rfc-ignorant.org (union of all results)
8042whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5036hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3678hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3454whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1253hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1056hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
514dbl.spamhaus.org
258hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
231urired.spameatingmonkey.net
131hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
61postmaster.rfc-ignorant.org
61hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
40dsn.rfc-ignorant.org (zone not intended for this use)
34bogusmx.rfc-ignorant.org
28multi.surbl.org
22fresh.spameatingmonkey.net
22dob.sibl.support-intelligence.net
19rhsbl.ahbl.org
8hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
5multi.uribl.com (result 127.0.0.2 = spam resource)
5multi.uribl.com (union of all results)
2bl.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
30044(total number of domains tested, including 132 at SDSC)
27720hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7938(union of most domain zones)
5713hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3546whois.rfc-ignorant.org (union of all results)
3358whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2997hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2745hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2519abuse.rfc-ignorant.org
1487postmaster.rfc-ignorant.org
1011l1.apews.org
791hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
763urired.spameatingmonkey.net
652dbl.spamhaus.org
602multi.surbl.org
530bogusmx.rfc-ignorant.org
437multi.uribl.com (union of all results)
429multi.uribl.com (result 127.0.0.2 = spam resource)
405hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
381hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
329dsn.rfc-ignorant.org
188whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
33dob.sibl.support-intelligence.net
22hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
18fresh.spameatingmonkey.net
17hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
16rhsbl.ahbl.org
10ex.dnsbl.org
7multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
5hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2bl.deadbeef.com
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 3 February 2011.