Blacklists Compared

12 March 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
81300(total number of IP addresses tested, including 170 at SDSC)
77920(union of most IP zones)
68670b.barracudacentral.org
67612zen.spamhaus.org (union of all results)
66746l2.apews.org
65912cbl.abuseat.org
65908zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
54030hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
53077bl.mailspike.net (union of all results)
49165dnsbl-1.uceprotect.net
44352zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
41869psbl.surriel.com
41800bl.spameatingmonkey.net
41656dnsbl-2.uceprotect.net
40986dnsbl-3.uceprotect.net
38511bl.tiopan.com
35038hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
33580ddnsbl.internetdefensesystems.com
30711bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
27339spam.dnsbl.sorbs.net
26386blackholes.five-ten-sg.com (union of all results)
21828bl.mailspike.net (result 127.0.0.11 = very bad reputation)
18483bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
17350db.wpbl.info
16467dnsbl.sorbs.net (union of all results)
15305blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
15183bl.spamcop.net
12858ubl.unsubscore.com
12250dnsbl.sorbs.net (result 127.0.0.10 = dialup)
9691blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
9459ix.dnsbl.manitu.net
8911dnsbl.inps.de
8821bl.mailspike.net (result 127.0.0.12 = bad reputation)
8584no-more-funn.moensted.dk (union of all results)
8118zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6763mail-abuse.blacklist.jippg.org
5355list.dnswl.org (not a blacklist!)
5177no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
4923hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
4422wl.mailspike.net (union of all results) (not a blacklist!)
3582dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3580ips.backscatterer.org
3360hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3213no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2617wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2331hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1896spamsources.fabel.dk
1805korea.services.net
1794wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1709bl.spamcannibal.org
1370blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
994hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
781dnsbl.sorbs.net (result 127.0.0.6 = spam source)
700dnsbl.njabl.org (union of all results)
683l2.bbfh.ext.sorbs.net
615tr.countries.nerd.dk
595dnsbl.njabl.org (result 127.0.0.9 = open proxy)
594accredit.habeas.com (not a blacklist!)
516query.bondedsender.org (not a blacklist!)
345aspews.ext.sorbs.net
288dnsbl.ahbl.org (union of all results)
279zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
279zen.spamhaus.org (union of SBL and SBLCSS results)
249bl.score.senderscore.com
221l1.bbfh.ext.sorbs.net
198dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
164iadb2.isipp.com (not a blacklist!)
137iadb.isipp.com (not a blacklist!)
126no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
116dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
116dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
116dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
98no-more-funn.moensted.dk (result 127.0.0.9 = misc)
84hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
71dnsbl.njabl.org (result 127.0.0.2 = open relay)
66dnsbl.ahbl.org (result 127.0.0.4 = spam source)
53no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
52tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
52tor.dnsbl.sectoor.de (union of all results)
34dnsbl.njabl.org (result 127.0.0.4 = spam source)
23dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
20blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
17bl.deadbeef.com
16swl.spamhaus.org (union of all results) (not a blacklist!)
11wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
9swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
8multi.surbl.org
7zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
7swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
4spamguard.leadmon.net (union of all results)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
2dnsbl-0.uceprotect.net
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
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
81300(total number of IP addresses whose names were tested, including 170 at SDSC)
47153hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
39816hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
33658(union of most domain zones)
29203abuse.rfc-ignorant.org
26994l1.apews.org
11378whois.rfc-ignorant.org (union of all results)
8609whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4999hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3822hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2769whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
829hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
675hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
244hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
237urired.spameatingmonkey.net
157dbl.spamhaus.org (result 127.0.1.2 = spam source)
157dbl.spamhaus.org (union of all results)
136hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
70hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
55postmaster.rfc-ignorant.org
43bogusmx.rfc-ignorant.org
35multi.surbl.org
34dsn.rfc-ignorant.org (zone not intended for this use)
21rhsbl.ahbl.org
17fresh.spameatingmonkey.net
14multi.uribl.com (result 127.0.0.2 = spam resource)
14multi.uribl.com (union of all results)
13hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
6dob.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
35154(total number of domains tested, including 137 at SDSC)
31438hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
9517(union of most domain zones)
5558hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4837whois.rfc-ignorant.org (union of all results)
4496whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2811hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2600hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2546abuse.rfc-ignorant.org
1456postmaster.rfc-ignorant.org
1130l1.apews.org
1083hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1044urired.spameatingmonkey.net
877dbl.spamhaus.org (result 127.0.1.2 = spam source)
877dbl.spamhaus.org (union of all results)
717hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
544bogusmx.rfc-ignorant.org
506multi.surbl.org
417multi.uribl.com (union of all results)
409hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
404multi.uribl.com (result 127.0.0.2 = spam resource)
345dsn.rfc-ignorant.org
341whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
51fresh.spameatingmonkey.net
17rhsbl.ahbl.org
15hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
14hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10dob.sibl.support-intelligence.net
8ex.dnsbl.org
7hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
2multi.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 16 March 2011.