Blacklists Compared

11 January 2014

[ 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
45558(total number of IP addresses tested, including 163 at SDSC)
40169(union of most IP zones)
33885l2.apews.org
33773b.barracudacentral.org
33118zen.spamhaus.org (union of all results)
30381cbl.abuseat.org
30380zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
29775spam.dnsbl.sorbs.net
26912hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
24547dnsbl-1.uceprotect.net
24172hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
23452psbl.surriel.com
22825bl.mailspike.net (union of all results)
22743ubl.unsubscore.com
21209bl.tiopan.com
20847db.wpbl.info
19151zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
18717dnsbl.sorbs.net (union of all results)
16644bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
15849bl.spameatingmonkey.net
15178dnsbl.inps.de
12209all.spamrats.com (union of all results)
10417dnsbl.sorbs.net (result 127.0.0.6 = spam source)
8795bl.spamcop.net
8736dnsbl-2.uceprotect.net
8579all.spamrats.com (result 127.0.0.36 = dialup)
7880dnsbl-3.uceprotect.net
7661dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
7447dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6098list.dnswl.org (not a blacklist!)
5498truncate.gbudb.net
5286wl.mailspike.net (union of all results) (not a blacklist!)
5171ips.backscatterer.org
4851ix.dnsbl.manitu.net
4072bl.score.senderscore.com
3970zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3426all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3336hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
3196bl.mailspike.net (result 127.0.0.12 = bad reputation)
3116wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
3061hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2467bl.mailspike.net (result 127.0.0.11 = very bad reputation)
2315hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2091hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1722mail-abuse.blacklist.jippg.org
1529bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1423wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1159zen.spamhaus.org (union of SBL and SBLCSS results)
1154bl.spamcannibal.org
1050all.s5h.net
863spamsources.fabel.dk
820tr.countries.nerd.dk
786accredit.habeas.com (not a blacklist!)
745query.bondedsender.org (not a blacklist!)
714free.v4bl.org
712zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
651wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
468korea.services.net
447zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
261hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
235all.spamrats.com (result 127.0.0.38 = spam source)
169iadb.isipp.com (not a blacklist!)
103dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
103dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
103dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
102iadb2.isipp.com (not a blacklist!)
96wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
66dnsbl.ahbl.org (union of all results)
65bl.mav.com.br
56dnsbl.ahbl.org (result 127.0.0.4 = spam source)
33tor.dnsbl.sectoor.de (union of all results)
30tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
9dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
7multi.surbl.org
4dnsbl-0.uceprotect.net
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (union of all results)
1dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment 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
45558(total number of IP addresses whose names were tested, including 163 at SDSC)
29733hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
24779hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
13725l1.apews.org
3847hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2544hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2008(union of most domain zones)
871hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
584hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
540dbl.spamhaus.org (result 127.0.1.2 = spam source)
540dbl.spamhaus.org (union of all results)
261hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
240hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
102hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
43fresh.spameatingmonkey.net
39multi.surbl.org
32rhsbl.ahbl.org
25hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
20dob.sibl.support-intelligence.net
15urired.spameatingmonkey.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
17598(total number of domains tested, including 119 at SDSC)
12111hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4364hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3455(union of most domain zones)
2571hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2560hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
2106dbl.spamhaus.org (union of all results)
2104dbl.spamhaus.org (result 127.0.1.2 = spam source)
1448hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1212hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1027multi.surbl.org
785l1.apews.org
499dob.sibl.support-intelligence.net
489fresh.spameatingmonkey.net
198hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
52urired.spameatingmonkey.net
34hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
31rhsbl.ahbl.org
23hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
6ex.dnsbl.org
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 12 January 2014.