Blacklists Compared

18 June 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
53089(total number of IP addresses tested, including 170 at SDSC)
49868(union of most IP zones)
40765l2.apews.org
40740b.barracudacentral.org
39703zen.spamhaus.org (union of all results)
38156cbl.abuseat.org
38155zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
32210hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
31587bl.mailspike.net (union of all results)
29619dnsbl-1.uceprotect.net
25219spam.dnsbl.sorbs.net
24988zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
24438dnsbl-2.uceprotect.net
24056dnsbl-3.uceprotect.net
20254bl.tiopan.com
20074truncate.gbudb.net
19871bl.spameatingmonkey.net
19513ddnsbl.internetdefensesystems.com
19032hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
18415dnsbl.sorbs.net (union of all results)
18349blackholes.five-ten-sg.com (union of all results)
16619bl.mailspike.net (result 127.0.0.11 = very bad reputation)
16171bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
15499psbl.surriel.com
12716ubl.unsubscore.com
10436dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
10410bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
10128blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
6942db.wpbl.info
6628bl.spamcop.net
6562blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
5750dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5661no-more-funn.moensted.dk (union of all results)
5593dnsbl.sorbs.net (result 127.0.0.10 = dialup)
5545list.dnswl.org (not a blacklist!)
5395bl.score.senderscore.com
5224zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3991wl.mailspike.net (union of all results) (not a blacklist!)
3776bl.mailspike.net (result 127.0.0.12 = bad reputation)
3774ix.dnsbl.manitu.net
3747hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3242dnsbl.inps.de
3111no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2788hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2590ips.backscatterer.org
2477hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2477no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
2429wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2293korea.services.net
1627blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1555wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1525hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1431spamsources.fabel.dk
1373bl.spamcannibal.org
1209mail-abuse.blacklist.jippg.org
614accredit.habeas.com (not a blacklist!)
569query.bondedsender.org (not a blacklist!)
493zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
493zen.spamhaus.org (union of SBL and SBLCSS results)
479dnsbl.njabl.org (union of all results)
372dnsbl.njabl.org (result 127.0.0.9 = open proxy)
364l2.bbfh.ext.sorbs.net
348aspews.ext.sorbs.net
297tr.countries.nerd.dk
259iadb2.isipp.com (not a blacklist!)
232iadb.isipp.com (not a blacklist!)
207dnsbl.ahbl.org (union of all results)
167l1.bbfh.ext.sorbs.net
85hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
76dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
76dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
76dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
75dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
69dnsbl.ahbl.org (result 127.0.0.4 = spam source)
63dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
62dnsbl.njabl.org (result 127.0.0.2 = open relay)
45dnsbl.njabl.org (result 127.0.0.4 = spam source)
45no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
43no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
37tor.dnsbl.sectoor.de (union of all results)
36tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
32no-more-funn.moensted.dk (result 127.0.0.9 = misc)
32blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
18swl.spamhaus.org (union of all results) (not a blacklist!)
10bl.deadbeef.com
9swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
9swl.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!)
5multi.surbl.org
4dnsbl-0.uceprotect.net
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (union of all results)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
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
53089(total number of IP addresses whose names were tested, including 170 at SDSC)
29989hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
24331hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
19629(union of most domain zones)
16699abuse.rfc-ignorant.org
14296l1.apews.org
6258whois.rfc-ignorant.org (union of all results)
5052whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3785hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2888hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1209whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
400hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
374hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
236hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
205hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
200urired.spameatingmonkey.net
167hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
166dbl.spamhaus.org (result 127.0.1.2 = spam source)
166dbl.spamhaus.org (union of all results)
58postmaster.rfc-ignorant.org
32bogusmx.rfc-ignorant.org
24multi.surbl.org
20fresh.spameatingmonkey.net
20dob.sibl.support-intelligence.net
19rhsbl.ahbl.org
16multi.uribl.com (result 127.0.0.2 = spam resource)
16multi.uribl.com (union of all results)
13hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
8dsn.rfc-ignorant.org (zone not intended for this use)
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
36048(total number of domains tested, including 133 at SDSC)
24936hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7328(union of most domain zones)
4373hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3681whois.rfc-ignorant.org (union of all results)
3520whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2655hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2653hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1752abuse.rfc-ignorant.org
1168hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
953postmaster.rfc-ignorant.org
735l1.apews.org
706bogusmx.rfc-ignorant.org
633urired.spameatingmonkey.net
492hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
461dbl.spamhaus.org (result 127.0.1.2 = spam source)
461dbl.spamhaus.org (union of all results)
443hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
345multi.uribl.com (union of all results)
338multi.uribl.com (result 127.0.0.2 = spam resource)
331dsn.rfc-ignorant.org
282multi.surbl.org
161whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
113dob.sibl.support-intelligence.net
94fresh.spameatingmonkey.net
84hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
19rhsbl.ahbl.org
14hostkarma.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)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 20 June 2011.