Blacklists Compared

9 April 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
50865(total number of IP addresses tested, including 166 at SDSC)
47548(union of most IP zones)
38713b.barracudacentral.org
38131l2.apews.org
37575zen.spamhaus.org (union of all results)
36237zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
36237cbl.abuseat.org
30966hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
28256bl.mailspike.net (union of all results)
25482zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
25314dnsbl-1.uceprotect.net
23347dnsbl-3.uceprotect.net
23046dnsbl-2.uceprotect.net
20862bl.tiopan.com
20520bl.spameatingmonkey.net
18452hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18340spam.dnsbl.sorbs.net
18197dnsbl.sorbs.net (union of all results)
18014blackholes.five-ten-sg.com (union of all results)
16142psbl.surriel.com
15578ddnsbl.internetdefensesystems.com
13894dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
13681bl.mailspike.net (result 127.0.0.11 = very bad reputation)
12959bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
10260bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
10036blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
6857db.wpbl.info
6528blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6168bl.spamcop.net
5424list.dnswl.org (not a blacklist!)
5295ubl.unsubscore.com
5218dnsbl.sorbs.net (result 127.0.0.10 = dialup)
5151no-more-funn.moensted.dk (union of all results)
4101hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3781wl.mailspike.net (union of all results) (not a blacklist!)
3562bl.mailspike.net (result 127.0.0.12 = bad reputation)
3455zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3422hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3289dnsbl.inps.de
3263ips.backscatterer.org
2556no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2376no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
2330hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2309wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2215ix.dnsbl.manitu.net
1458wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1422blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1408korea.services.net
1321mail-abuse.blacklist.jippg.org
1255bl.spamcannibal.org
1233hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1227spamsources.fabel.dk
1193dnsbl.sorbs.net (result 127.0.0.6 = spam source)
987l2.bbfh.ext.sorbs.net
623accredit.habeas.com (not a blacklist!)
556query.bondedsender.org (not a blacklist!)
448bl.score.senderscore.com
434zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
434zen.spamhaus.org (union of SBL and SBLCSS results)
417dnsbl.njabl.org (union of all results)
400tr.countries.nerd.dk
397l1.bbfh.ext.sorbs.net
382aspews.ext.sorbs.net
322dnsbl.njabl.org (result 127.0.0.9 = open proxy)
205iadb2.isipp.com (not a blacklist!)
184dnsbl.ahbl.org (union of all results)
177iadb.isipp.com (not a blacklist!)
126hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
101no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
97no-more-funn.moensted.dk (result 127.0.0.9 = misc)
84dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
80dnsbl.ahbl.org (result 127.0.0.4 = spam source)
55dnsbl.njabl.org (result 127.0.0.2 = open relay)
54dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
54dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
54dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
44no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
40dnsbl.njabl.org (result 127.0.0.4 = spam source)
26tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
26blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
26tor.dnsbl.sectoor.de (union of all results)
21swl.spamhaus.org (union of all results) (not a blacklist!)
20dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
16bl.deadbeef.com
14wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
11swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
10swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
6multi.surbl.org
5zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
4dnsbl-0.uceprotect.net
1multi.uribl.com (result 127.0.0.2 = spam resource)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1multi.uribl.com (union of all results)
1spamguard.leadmon.net (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
50865(total number of IP addresses whose names were tested, including 166 at SDSC)
28271hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
24102hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
19366(union of most domain zones)
16498abuse.rfc-ignorant.org
13769l1.apews.org
7067whois.rfc-ignorant.org (union of all results)
5694whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3663hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3173hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1373whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
588hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
461hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
302hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
259dbl.spamhaus.org (result 127.0.1.2 = spam source)
259dbl.spamhaus.org (union of all results)
229urired.spameatingmonkey.net
177hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
143hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
50postmaster.rfc-ignorant.org
42bogusmx.rfc-ignorant.org
38hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
37fresh.spameatingmonkey.net
23rhsbl.ahbl.org
21multi.surbl.org
17dsn.rfc-ignorant.org (zone not intended for this use)
6multi.uribl.com (result 127.0.0.2 = spam resource)
6multi.uribl.com (union of all results)
1dob.sibl.support-intelligence.net
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
29929(total number of domains tested, including 128 at SDSC)
21261hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7493(union of most domain zones)
4546hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
4305hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2763whois.rfc-ignorant.org (union of all results)
2611whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2579hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2312hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1896dbl.spamhaus.org (result 127.0.1.2 = spam source)
1896dbl.spamhaus.org (union of all results)
1466abuse.rfc-ignorant.org
1031urired.spameatingmonkey.net
844postmaster.rfc-ignorant.org
676hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
635l1.apews.org
479multi.uribl.com (union of all results)
471multi.surbl.org
470multi.uribl.com (result 127.0.0.2 = spam resource)
406bogusmx.rfc-ignorant.org
372hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
262dsn.rfc-ignorant.org
176fresh.spameatingmonkey.net
154hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
152whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
21hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
19dob.sibl.support-intelligence.net
17rhsbl.ahbl.org
11hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
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)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 11 April 2011.