Blacklists Compared

22 December 2012

[ 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, l2.apews.org, and ip.v4bl.org zones are also excluded from the union.

HitsDNS Zone
38192(total number of IP addresses tested, including 154 at SDSC)
33410(union of most IP zones)
25564b.barracudacentral.org
24759l2.apews.org
24160zen.spamhaus.org (union of all results)
23375ip.v4bl.org
22808zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
22807cbl.abuseat.org
21664bl.tiopan.com
19908hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
19317hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16196dnsbl-1.uceprotect.net
14931bl.mailspike.net (union of all results)
14564zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
11300bl.mailspike.net (result 127.0.0.12 = bad reputation)
10787dnsbl.sorbs.net (union of all results)
10607ubl.unsubscore.com
9996psbl.surriel.com
9807dnsbl-2.uceprotect.net
9200all.spamrats.com (union of all results)
9127spam.dnsbl.sorbs.net
9070dnsbl-3.uceprotect.net
8039wl.mailspike.net (union of all results) (not a blacklist!)
7800bl.spameatingmonkey.net
7581dnsbl.inps.de
7379list.dnswl.org (not a blacklist!)
7161dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6653db.wpbl.info
5537wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
4541free.v4bl.org
4453all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
4442all.spamrats.com (result 127.0.0.36 = dialup)
3385truncate.gbudb.net
3224bl.spamcop.net
3130hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
3102bl.mailspike.net (result 127.0.0.11 = very bad reputation)
3039dnsbl.sorbs.net (result 127.0.0.10 = dialup)
2706hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2332bl.score.senderscore.com
2206ix.dnsbl.manitu.net
2108wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2041dnsbl.sorbs.net (result 127.0.0.6 = spam source)
1972ips.backscatterer.org
1905zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1896hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1669all.s5h.net
1569bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
1449hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1195bl.spamcannibal.org
1135zen.spamhaus.org (union of SBL and SBLCSS results)
867spamsources.fabel.dk
806accredit.habeas.com (not a blacklist!)
744zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
638korea.services.net
634query.bondedsender.org (not a blacklist!)
413tr.countries.nerd.dk
391zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
345l2.bbfh.ext.sorbs.net
341mail-abuse.blacklist.jippg.org
334all.spamrats.com (result 127.0.0.38 = spam source)
278iadb.isipp.com (not a blacklist!)
239wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
171dnsbl.ahbl.org (union of all results)
155wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
152dnsbl.njabl.org (union of all results)
136hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
130dnsbl.ahbl.org (result 127.0.0.4 = spam source)
129iadb2.isipp.com (not a blacklist!)
123dnsbl.njabl.org (result 127.0.0.9 = open proxy)
51bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
49tor.dnsbl.sectoor.de (union of all results)
48tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
28dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
28dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
28dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
26dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
18dnsbl.njabl.org (result 127.0.0.2 = open relay)
15dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
11dnsbl.njabl.org (result 127.0.0.4 = spam source)
7hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6multi.surbl.org
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3spamguard.leadmon.net (union of all results)
2multi.uribl.com (result 127.0.0.2 = spam resource)
2dnsbl-0.uceprotect.net
2spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
2multi.uribl.com (union of all results)
1wadb.isipp.com
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
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
38192(total number of IP addresses whose names were tested, including 154 at SDSC)
19527hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
15683hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
5401l1.apews.org
2729hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2376hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2258(union of most domain zones)
966hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
444hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
397dbl.spamhaus.org (result 127.0.1.2 = spam source)
397dbl.spamhaus.org (union of all results)
326hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
165urired.spameatingmonkey.net
159dob.sibl.support-intelligence.net
156hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
76hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
55rhsbl.ahbl.org
41multi.uribl.com (result 127.0.0.2 = spam resource)
41multi.surbl.org
41multi.uribl.com (union of all results)
16hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
13fresh.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
29044(total number of domains tested, including 100 at SDSC)
25972hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
3800hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3501(union of most domain zones)
2439dbl.spamhaus.org (union of all results)
2437dbl.spamhaus.org (result 127.0.1.2 = spam source)
2272hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1960hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1889hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1458multi.surbl.org
1305multi.uribl.com (union of all results)
1288multi.uribl.com (result 127.0.0.2 = spam resource)
1285hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
956urired.spameatingmonkey.net
555l1.apews.org
507fresh.spameatingmonkey.net
340dob.sibl.support-intelligence.net
301hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
27hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
27rhsbl.ahbl.org
14multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
12hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
9ex.dnsbl.org
6hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
2dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 23 December 2012.