Blacklists Compared

17 March 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 and l2.apews.org zones are also excluded from the union.

HitsDNS Zone
55556(total number of IP addresses tested, including 166 at SDSC)
52854(union of most IP zones)
43213l2.apews.org
43191b.barracudacentral.org
42224zen.spamhaus.org (union of all results)
40258zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
40256cbl.abuseat.org
40129ip.v4bl.org
33852bl.tiopan.com
29020bl.mailspike.net (union of all results)
27535zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
26114hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
25826dnsbl-1.uceprotect.net
25714all.spamrats.com (union of all results)
23734hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
22076spam.dnsbl.sorbs.net
21654dnsbl-3.uceprotect.net
21305dnsbl-2.uceprotect.net
20190truncate.gbudb.net
19281dnsbl.sorbs.net (union of all results)
18929bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
17225bl.spameatingmonkey.net
16609ubl.unsubscore.com
14763blackholes.five-ten-sg.com (union of all results)
14560all.spamrats.com (result 127.0.0.36 = dialup)
11312dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
11255all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
8955dnsbl.sorbs.net (result 127.0.0.10 = dialup)
8519bl.mailspike.net (result 127.0.0.11 = very bad reputation)
7548bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
6896bl.spamcop.net
6720blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
6614blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6559dnsbl.inps.de
6350list.dnswl.org (not a blacklist!)
5940zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5429db.wpbl.info
4480psbl.surriel.com
3754wl.mailspike.net (union of all results) (not a blacklist!)
3715hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
3236bl.score.senderscore.com
3053ips.backscatterer.org
2764hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2647hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2451ix.dnsbl.manitu.net
2394wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1682hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1528korea.services.net
1421blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1371bl.spamcannibal.org
1360wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1064spamsources.fabel.dk
738mail-abuse.blacklist.jippg.org
695dnsbl.sorbs.net (result 127.0.0.6 = spam source)
685accredit.habeas.com (not a blacklist!)
619query.bondedsender.org (not a blacklist!)
592zen.spamhaus.org (union of SBL and SBLCSS results)
436zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
384dnsbl.njabl.org (union of all results)
331l1.bbfh.ext.sorbs.net
329l2.bbfh.ext.sorbs.net
317dnsbl.njabl.org (result 127.0.0.9 = open proxy)
302tr.countries.nerd.dk
266aspews.ext.sorbs.net
228dnsbl.ahbl.org (union of all results)
199iadb.isipp.com (not a blacklist!)
159hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
156zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
154dnsbl.ahbl.org (result 127.0.0.4 = spam source)
113iadb2.isipp.com (not a blacklist!)
69dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
69dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
69dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
62tor.dnsbl.sectoor.de (union of all results)
60tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
58dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
40dnsbl.njabl.org (result 127.0.0.2 = open relay)
27dnsbl.njabl.org (result 127.0.0.4 = spam source)
26dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
16dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
16swl.spamhaus.org (union of all results) (not a blacklist!)
13multi.surbl.org
13hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
10dnsbl-0.uceprotect.net
8swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
8blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
8bl.deadbeef.com
5swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
3multi.uribl.com (result 127.0.0.2 = spam resource)
3swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
3multi.uribl.com (union of all results)
2tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2spamguard.leadmon.net (union of all results)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
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
55556(total number of IP addresses whose names were tested, including 166 at SDSC)
29126hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
23339hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
19104(union of most domain zones)
15281abuse.rfc-ignorant.org
12427l1.apews.org
7446whois.rfc-ignorant.org (union of all results)
6354whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4005hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2830hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1093whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
441hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
330dbl.spamhaus.org (result 127.0.1.2 = spam source)
330dbl.spamhaus.org (union of all results)
291hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
235urired.spameatingmonkey.net
226hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
188hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
91hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
41multi.surbl.org
32postmaster.rfc-ignorant.org
32dob.sibl.support-intelligence.net
31fresh.spameatingmonkey.net
25bogusmx.rfc-ignorant.org
22rhsbl.ahbl.org
8multi.uribl.com (result 127.0.0.2 = spam resource)
8multi.uribl.com (union of all results)
6dsn.rfc-ignorant.org (zone not intended for this use)
5hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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
25049(total number of domains tested, including 132 at SDSC)
18159hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4918(union of most domain zones)
3561hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
1925hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1782whois.rfc-ignorant.org (union of all results)
1708hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1657whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
1271abuse.rfc-ignorant.org
909hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
908dbl.spamhaus.org (result 127.0.1.2 = spam source)
908dbl.spamhaus.org (union of all results)
843hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
647postmaster.rfc-ignorant.org
527multi.surbl.org
527urired.spameatingmonkey.net
476l1.apews.org
402bogusmx.rfc-ignorant.org
378multi.uribl.com (union of all results)
367multi.uribl.com (result 127.0.0.2 = spam resource)
280hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
208fresh.spameatingmonkey.net
202dsn.rfc-ignorant.org
187dob.sibl.support-intelligence.net
125whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
23hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
20rhsbl.ahbl.org
17hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
15hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
8ex.dnsbl.org
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 19 March 2012.