Blacklists Compared

6 August 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
42065(total number of IP addresses tested, including 275 at SDSC)
38669(union of most IP zones)
30630b.barracudacentral.org
30618l2.apews.org
28426zen.spamhaus.org (union of all results)
26647cbl.abuseat.org
26646zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
25061hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
23227bl.mailspike.net (union of all results)
20772dnsbl-1.uceprotect.net
18094zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
17308spam.dnsbl.sorbs.net
17280hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
17168dnsbl-3.uceprotect.net
17064dnsbl-2.uceprotect.net
15713ddnsbl.internetdefensesystems.com
15458bl.tiopan.com
14697truncate.gbudb.net
14168blackholes.five-ten-sg.com (union of all results)
13880bl.spameatingmonkey.net
13273bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
11812ubl.unsubscore.com
11463psbl.surriel.com
11169bl.mailspike.net (result 127.0.0.11 = very bad reputation)
9953dnsbl.sorbs.net (union of all results)
8990bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
7204blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
6466dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
5499list.dnswl.org (not a blacklist!)
5453bl.spamcop.net
5449blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
5049bl.score.senderscore.com
4988db.wpbl.info
4262no-more-funn.moensted.dk (union of all results)
4137wl.mailspike.net (union of all results) (not a blacklist!)
4015zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3646dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3386hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3103ix.dnsbl.manitu.net
2771hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2610dnsbl.inps.de
2523wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2488hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2379no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2317bl.mailspike.net (result 127.0.0.12 = bad reputation)
2309ips.backscatterer.org
1721no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1606wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1569hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1496blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1389korea.services.net
1094spamsources.fabel.dk
1078bl.spamcannibal.org
977mail-abuse.blacklist.jippg.org
582accredit.habeas.com (not a blacklist!)
577dnsbl.sorbs.net (result 127.0.0.6 = spam source)
543query.bondedsender.org (not a blacklist!)
403dnsbl.njabl.org (union of all results)
312aspews.ext.sorbs.net
298tr.countries.nerd.dk
285dnsbl.njabl.org (result 127.0.0.9 = open proxy)
277zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
277zen.spamhaus.org (union of SBL and SBLCSS results)
245iadb2.isipp.com (not a blacklist!)
225iadb.isipp.com (not a blacklist!)
172dnsbl.ahbl.org (union of all results)
123hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
91dnsbl.ahbl.org (result 127.0.0.4 = spam source)
85no-more-funn.moensted.dk (result 127.0.0.9 = misc)
79no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
77dnsbl.njabl.org (result 127.0.0.2 = open relay)
72l2.bbfh.ext.sorbs.net
64dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
55dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
55dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
55dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
41dnsbl.njabl.org (result 127.0.0.4 = spam source)
39tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
39l1.bbfh.ext.sorbs.net
39tor.dnsbl.sectoor.de (union of all results)
21no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
21swl.spamhaus.org (union of all results) (not a blacklist!)
19blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
17dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
14bl.deadbeef.com
11multi.surbl.org
11hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
10swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
8wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
6swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
5swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
3multi.uribl.com (result 127.0.0.2 = spam resource)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3multi.uribl.com (union of all results)
3spamguard.leadmon.net (union of all results)
1zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1dnsbl-0.uceprotect.net
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
42065(total number of IP addresses whose names were tested, including 275 at SDSC)
23882hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
19474hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
15537(union of most domain zones)
12533abuse.rfc-ignorant.org
9849l1.apews.org
5873whois.rfc-ignorant.org (union of all results)
4963whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3499hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2673hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
913whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
387hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
291hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
192hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
171hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
152urired.spameatingmonkey.net
122dbl.spamhaus.org (result 127.0.1.2 = spam source)
122dbl.spamhaus.org (union of all results)
52hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
35bogusmx.rfc-ignorant.org
34postmaster.rfc-ignorant.org
23multi.surbl.org
20fresh.spameatingmonkey.net
20rhsbl.ahbl.org
14dob.sibl.support-intelligence.net
11hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
9multi.uribl.com (result 127.0.0.2 = spam resource)
9multi.uribl.com (union of all results)
7dsn.rfc-ignorant.org (zone not intended for this use)
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
24615(total number of domains tested, including 279 at SDSC)
20214hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6465(union of most domain zones)
4310hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3476whois.rfc-ignorant.org (union of all results)
3322whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2158hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2108hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1677abuse.rfc-ignorant.org
883l1.apews.org
696postmaster.rfc-ignorant.org
584hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
552bogusmx.rfc-ignorant.org
511hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
414urired.spameatingmonkey.net
414dbl.spamhaus.org (result 127.0.1.2 = spam source)
414dbl.spamhaus.org (union of all results)
363multi.surbl.org
335hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
296multi.uribl.com (union of all results)
289multi.uribl.com (result 127.0.0.2 = spam resource)
269dsn.rfc-ignorant.org
154whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
80fresh.spameatingmonkey.net
75dob.sibl.support-intelligence.net
29hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
15hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
15rhsbl.ahbl.org
14hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8ex.dnsbl.org
7multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 8 August 2011.