Blacklists Compared

26 February 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
82850(total number of IP addresses tested, including 157 at SDSC)
79650(union of most IP zones)
70302b.barracudacentral.org
69211zen.spamhaus.org (union of all results)
68366l2.apews.org
67708cbl.abuseat.org
67706zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
61142hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
53770bl.mailspike.net (union of all results)
52439dnsbl-1.uceprotect.net
44693psbl.surriel.com
44541zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
42668bl.spameatingmonkey.net
41786dnsbl-2.uceprotect.net
41441bl.tiopan.com
41261dnsbl-3.uceprotect.net
37548hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
33683ddnsbl.internetdefensesystems.com
32019bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
31131spam.dnsbl.sorbs.net
28341blackholes.five-ten-sg.com (union of all results)
22040bl.mailspike.net (result 127.0.0.11 = very bad reputation)
19282db.wpbl.info
18153dnsbl.sorbs.net (union of all results)
16576bl.spamcop.net
16201blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
15511ubl.unsubscore.com
14962bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
12365dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10752blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
10540bl.mailspike.net (result 127.0.0.12 = bad reputation)
10220ix.dnsbl.manitu.net
9636dnsbl.inps.de
8846no-more-funn.moensted.dk (union of all results)
8681zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
7498mail-abuse.blacklist.jippg.org
7038hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5227no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
5199list.dnswl.org (not a blacklist!)
3880dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3717ips.backscatterer.org
3529wl.mailspike.net (union of all results) (not a blacklist!)
3376no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
3370hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2331dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2316hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2206wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1880bl.spamcannibal.org
1818korea.services.net
1749spamsources.fabel.dk
1353blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1316wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1011hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
960l2.bbfh.ext.sorbs.net
740bl.score.senderscore.com
708dnsbl.njabl.org (union of all results)
590dnsbl.njabl.org (result 127.0.0.9 = open proxy)
568accredit.habeas.com (not a blacklist!)
512query.bondedsender.org (not a blacklist!)
502tr.countries.nerd.dk
375aspews.ext.sorbs.net
339dnsbl.ahbl.org (union of all results)
239zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
239zen.spamhaus.org (union of SBL and SBLCSS results)
216dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
205l1.bbfh.ext.sorbs.net
151iadb2.isipp.com (not a blacklist!)
133no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
127iadb.isipp.com (not a blacklist!)
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)
106no-more-funn.moensted.dk (result 127.0.0.9 = misc)
104dnsbl.ahbl.org (result 127.0.0.4 = spam source)
94hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
85dnsbl.njabl.org (result 127.0.0.2 = open relay)
56tor.dnsbl.sectoor.de (union of all results)
54tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
52no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
35blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
33dnsbl.njabl.org (result 127.0.0.4 = spam source)
19dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
18bl.deadbeef.com
18swl.spamhaus.org (union of all results) (not a blacklist!)
13multi.surbl.org
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!)
7wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
5zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4dnsbl-0.uceprotect.net
4spamguard.leadmon.net (union of all results)
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)
2tor.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)
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
82850(total number of IP addresses whose names were tested, including 157 at SDSC)
48664hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
41376hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
35138(union of most domain zones)
30316abuse.rfc-ignorant.org
28193l1.apews.org
11806whois.rfc-ignorant.org (union of all results)
9262whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4806hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3792hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2544whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
933hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
826hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
323hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
245dbl.spamhaus.org
201urired.spameatingmonkey.net
133hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
90hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
64postmaster.rfc-ignorant.org
36bogusmx.rfc-ignorant.org
34dsn.rfc-ignorant.org (zone not intended for this use)
23fresh.spameatingmonkey.net
20rhsbl.ahbl.org
19multi.surbl.org
18dob.sibl.support-intelligence.net
4multi.uribl.com (result 127.0.0.2 = spam resource)
4hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
4multi.uribl.com (union of all results)
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
27908(total number of domains tested, including 119 at SDSC)
25020hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
8470(union of most domain zones)
5795hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
4208whois.rfc-ignorant.org (union of all results)
3997whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2979hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2690hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2518abuse.rfc-ignorant.org
1545postmaster.rfc-ignorant.org
1004l1.apews.org
703hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
626urired.spameatingmonkey.net
585bogusmx.rfc-ignorant.org
582dbl.spamhaus.org
508multi.surbl.org
489hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
436multi.uribl.com (union of all results)
427multi.uribl.com (result 127.0.0.2 = spam resource)
389hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
370dsn.rfc-ignorant.org
211whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
68fresh.spameatingmonkey.net
61dob.sibl.support-intelligence.net
19rhsbl.ahbl.org
16hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
16hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
14hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
11ex.dnsbl.org
7multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
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 1 March 2011.