Blacklists Compared

10 September 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
50560(total number of IP addresses tested, including 273 at SDSC)
47857(union of most IP zones)
39281b.barracudacentral.org
38884l2.apews.org
37424zen.spamhaus.org (union of all results)
35887zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
35887cbl.abuseat.org
32101hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
29544bl.mailspike.net (union of all results)
26637dnsbl-1.uceprotect.net
25374dnsbl-2.uceprotect.net
25188dnsbl-3.uceprotect.net
24598zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
22833spam.dnsbl.sorbs.net
22363hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
22172ddnsbl.internetdefensesystems.com
19757bl.tiopan.com
19237truncate.gbudb.net
18541dnsbl.sorbs.net (union of all results)
17471blackholes.five-ten-sg.com (union of all results)
17438bl.spameatingmonkey.net
17248ubl.unsubscore.com
14927psbl.surriel.com
13104bl.mailspike.net (result 127.0.0.11 = very bad reputation)
13057bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
12935dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
12918bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
9357blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
6613blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6221db.wpbl.info
6038bl.spamcop.net
5689list.dnswl.org (not a blacklist!)
5136zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5121dnsbl.sorbs.net (result 127.0.0.6 = spam source)
4877dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4518no-more-funn.moensted.dk (union of all results)
4426ix.dnsbl.manitu.net
3975wl.mailspike.net (union of all results) (not a blacklist!)
3627dnsbl.inps.de
3587hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3399bl.score.senderscore.com
2854bl.mailspike.net (result 127.0.0.12 = bad reputation)
2628wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2514hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2436ips.backscatterer.org
2408no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2372hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1854no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1555hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1513korea.services.net
1481blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1341wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1339bl.spamcannibal.org
1121spamsources.fabel.dk
949mail-abuse.blacklist.jippg.org
573accredit.habeas.com (not a blacklist!)
530query.bondedsender.org (not a blacklist!)
435dnsbl.njabl.org (union of all results)
332dnsbl.njabl.org (result 127.0.0.9 = open proxy)
281aspews.ext.sorbs.net
271dnsbl.ahbl.org (union of all results)
242zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
242zen.spamhaus.org (union of SBL and SBLCSS results)
240tr.countries.nerd.dk
207iadb2.isipp.com (not a blacklist!)
187iadb.isipp.com (not a blacklist!)
174dnsbl.ahbl.org (result 127.0.0.4 = spam source)
144no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
133hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
130l2.bbfh.ext.sorbs.net
112dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
112dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
112dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
91no-more-funn.moensted.dk (result 127.0.0.9 = misc)
69dnsbl.njabl.org (result 127.0.0.2 = open relay)
69dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
37l1.bbfh.ext.sorbs.net
34dnsbl.njabl.org (result 127.0.0.4 = spam source)
31no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
31tor.dnsbl.sectoor.de (union of all results)
30tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
28dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
20swl.spamhaus.org (union of all results) (not a blacklist!)
19blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
15bl.deadbeef.com
10swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
8dnsbl-0.uceprotect.net
8multi.surbl.org
7swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
6wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
5spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
5spamguard.leadmon.net (union of all results)
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
4hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
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
50560(total number of IP addresses whose names were tested, including 273 at SDSC)
26673hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
20905hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
17982(union of most domain zones)
14555abuse.rfc-ignorant.org
11477l1.apews.org
7407whois.rfc-ignorant.org (union of all results)
6450whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4388hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2667hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
959whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
439hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
276hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
191hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
190hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
175dbl.spamhaus.org (result 127.0.1.2 = spam source)
175dbl.spamhaus.org (union of all results)
159urired.spameatingmonkey.net
117hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
40bogusmx.rfc-ignorant.org
37postmaster.rfc-ignorant.org
24multi.surbl.org
19fresh.spameatingmonkey.net
19rhsbl.ahbl.org
16multi.uribl.com (result 127.0.0.2 = spam resource)
16hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
16multi.uribl.com (union of all results)
10dob.sibl.support-intelligence.net
6dsn.rfc-ignorant.org (zone not intended for this use)
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
30500(total number of domains tested, including 280 at SDSC)
25262hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6910(union of most domain zones)
4046hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3859whois.rfc-ignorant.org (union of all results)
3722whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2627hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2208hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2157hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1317abuse.rfc-ignorant.org
724postmaster.rfc-ignorant.org
683l1.apews.org
671urired.spameatingmonkey.net
590bogusmx.rfc-ignorant.org
470hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
422dbl.spamhaus.org (union of all results)
420dbl.spamhaus.org (result 127.0.1.2 = spam source)
315multi.uribl.com (union of all results)
302multi.uribl.com (result 127.0.0.2 = spam resource)
301hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
272multi.surbl.org
237dsn.rfc-ignorant.org
137whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
84hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
80fresh.spameatingmonkey.net
37dob.sibl.support-intelligence.net
23rhsbl.ahbl.org
15hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
13multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10ex.dnsbl.org
6hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
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 12 September 2011.