Blacklists Compared

22 September 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
28855(total number of IP addresses tested, including 166 at SDSC)
23862(union of most IP zones)
18615ip.v4bl.org
16710l2.apews.org
16706hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16592b.barracudacentral.org
16289zen.spamhaus.org (union of all results)
15422bl.tiopan.com
14888zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
14888cbl.abuseat.org
12583hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
10517dnsbl-1.uceprotect.net
10234psbl.surriel.com
10014wl.mailspike.net (union of all results) (not a blacklist!)
9752bl.mailspike.net (union of all results)
8693bl.mailspike.net (result 127.0.0.12 = bad reputation)
8624zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
7608all.spamrats.com (union of all results)
7394ubl.unsubscore.com
6878spam.dnsbl.sorbs.net
6645dnsbl-2.uceprotect.net
6395list.dnswl.org (not a blacklist!)
6274wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
5978dnsbl-3.uceprotect.net
5710dnsbl.inps.de
5193bl.spameatingmonkey.net
4630dnsbl.sorbs.net (union of all results)
3809all.spamrats.com (result 127.0.0.37 = no reverse DNS entry)
3490all.spamrats.com (result 127.0.0.36 = dialup)
3374db.wpbl.info
3040dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
2978bl.spamcop.net
2892hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2822wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2690hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2321bl.score.senderscore.com
2126truncate.gbudb.net
2001zen.spamhaus.org (union of SBL and SBLCSS results)
1939ips.backscatterer.org
1773dnsbl.sorbs.net (result 127.0.0.10 = dialup)
1701ix.dnsbl.manitu.net
1551zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
1494hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1463zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
1402all.s5h.net
932bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
900bl.spamcannibal.org
770bl.mailspike.net (result 127.0.0.11 = very bad reputation)
769mail-abuse.blacklist.jippg.org
726accredit.habeas.com (not a blacklist!)
681spamsources.fabel.dk
658wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
616query.bondedsender.org (not a blacklist!)
607tr.countries.nerd.dk
572hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
522korea.services.net
450zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
325all.spamrats.com (result 127.0.0.38 = spam source)
268l2.bbfh.ext.sorbs.net
265aspews.ext.sorbs.net
260wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
255iadb.isipp.com (not a blacklist!)
186dnsbl.njabl.org (union of all results)
150iadb2.isipp.com (not a blacklist!)
144hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
141dnsbl.njabl.org (result 127.0.0.9 = open proxy)
124dnsbl.ahbl.org (union of all results)
75dnsbl.ahbl.org (result 127.0.0.4 = spam source)
61tor.dnsbl.sectoor.de (union of all results)
56tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
46bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
35dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
35dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
35dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
27dnsbl.njabl.org (result 127.0.0.2 = open relay)
27dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
22dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
20dnsbl.sorbs.net (result 127.0.0.6 = spam source)
18dnsbl.njabl.org (result 127.0.0.4 = spam source)
6hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
5tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
3swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
3swl.spamhaus.org (union of all results) (not a blacklist!)
2dnsbl-0.uceprotect.net
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1multi.surbl.org
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
28855(total number of IP addresses whose names were tested, including 166 at SDSC)
16096hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
13466hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7919(union of most domain zones)
6077abuse.rfc-ignorant.org
3821l1.apews.org
2847hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2306whois.rfc-ignorant.org (union of all results)
1952hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1786whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
561dbl.spamhaus.org (result 127.0.1.2 = spam source)
561dbl.spamhaus.org (union of all results)
520whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
513hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
326hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
206hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
170hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
121bogusmx.rfc-ignorant.org
70hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
54urired.spameatingmonkey.net
44fresh.spameatingmonkey.net
33dob.sibl.support-intelligence.net
28rhsbl.ahbl.org
26postmaster.rfc-ignorant.org
24multi.surbl.org
20hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
17multi.uribl.com (result 127.0.0.2 = spam resource)
17multi.uribl.com (union of all results)
2dsn.rfc-ignorant.org (zone not intended for this use)
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
20409(total number of domains tested, including 123 at SDSC)
17601hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6931(union of most domain zones)
3729hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2940hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
2884dbl.spamhaus.org (result 127.0.1.2 = spam source)
2884dbl.spamhaus.org (union of all results)
2214whois.rfc-ignorant.org (union of all results)
2087whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2027multi.surbl.org
1813hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1670hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1409multi.uribl.com (union of all results)
1390multi.uribl.com (result 127.0.0.2 = spam resource)
1205hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1188abuse.rfc-ignorant.org
598postmaster.rfc-ignorant.org
559dob.sibl.support-intelligence.net
533l1.apews.org
401fresh.spameatingmonkey.net
264hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
261bogusmx.rfc-ignorant.org
190urired.spameatingmonkey.net
177dsn.rfc-ignorant.org
127whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
21rhsbl.ahbl.org
17hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
16multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
15hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
10hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5ex.dnsbl.org
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)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 23 September 2012.