Blacklists Compared

1 May 2010

[ 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, and wl.mailspike.net zones because they are not blacklists. Because it is too aggressive to be widely useful the l2.apews.org zone is also excluded from the union.

HitsDNS Zone
200641(total number of IP addresses tested, including 182 at SDSC)
197169(union of most IP zones)
186338b.barracudacentral.org
184293zen.spamhaus.org (union of all results)
171000l2.apews.org
153803cbl.abuseat.org
153802zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
140299psbl.surriel.com
138402dnsbl-1.uceprotect.net
137386hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
134201dnsbl-2.uceprotect.net
126709dnsbl-3.uceprotect.net
123314dnsbl.sorbs.net (union of all results)
122795bl.mailspike.net (union of all results)
108722zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
94347hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
85490dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
80985bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
73431bl.spameatingmonkey.net
67725spam.dnsbl.sorbs.net
56038ubl.unsubscore.com
52067dnsbl.sorbs.net (result 127.0.0.10 = dialup)
51023blackholes.five-ten-sg.com (union of all results)
45559blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
44965bl.tiopan.com
44314bl.spamcop.net
40013db.wpbl.info
38899bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
36349zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
31790bl.score.senderscore.com
29568ix.dnsbl.manitu.net
28239no-more-funn.moensted.dk (union of all results)
24376bl.mailspike.net (result 127.0.0.12 = bad reputation)
20831no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
19043mail-abuse.blacklist.jippg.org
13196bl.mailspike.net (result 127.0.0.11 = very bad reputation)
12704dnsbl.inps.de
9285dnsbl.sorbs.net (result 127.0.0.6 = spam source)
8983hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
6806no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
6194korea.services.net
5933bl.spamcannibal.org
4393list.dnswl.org (not a blacklist!)
4205spamsources.fabel.dk
4094blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4055dnsbl.ahbl.org (union of all results)
3480dnsbl.ahbl.org (result 127.0.0.4 = spam source)
3214ips.backscatterer.org
3000hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2455tr.countries.nerd.dk
1986dnsbl.njabl.org (union of all results)
1976hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1760dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1396hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1346blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
840wl.mailspike.net (union of all results) (not a blacklist!)
750wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
575dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
521accredit.habeas.com (not a blacklist!)
445zen.spamhaus.org (union of SBL and SBLCSS results)
436query.bondedsender.org (not a blacklist!)
426aspews.ext.sorbs.net
409zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
367no-more-funn.moensted.dk (result 127.0.0.9 = misc)
312no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
158dnsbl.njabl.org (result 127.0.0.2 = open relay)
152iadb2.isipp.com (not a blacklist!)
126hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
124iadb.isipp.com (not a blacklist!)
119tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
119tor.dnsbl.sectoor.de (union of all results)
115l2.bbfh.ext.sorbs.net
111no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
86wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
68dnsbl.njabl.org (result 127.0.0.4 = spam source)
36zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
36dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
35bl.deadbeef.com
27dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
21blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
15zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
15multi.surbl.org
13multi.uribl.com (result 127.0.0.2 = spam resource)
13multi.uribl.com (union of all results)
10dnsbl-0.uceprotect.net
9hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6spamguard.leadmon.net (union of all results)
4blackholes.brainerd.net
4l1.bbfh.ext.sorbs.net
3wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
2blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)

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
200641(total number of IP addresses whose names were tested, including 182 at SDSC)
132896hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
123473hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
114363(union of most domain zones)
97065l1.apews.org
91154abuse.rfc-ignorant.org
38622whois.rfc-ignorant.org (union of all results)
37857dynamic.rhs.mailpolice.com
27354whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
13202hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
11268whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
6673webmail.rhs.mailpolice.com
3234hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2087hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
911adv.rhs.mailpolice.com
519hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
349urired.spameatingmonkey.net
343hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
205dbl.spamhaus.org
154hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
112hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
63postmaster.rfc-ignorant.org
58bulk.rhs.mailpolice.com
48multi.surbl.org
47multi.uribl.com (result 127.0.0.2 = spam resource)
47multi.uribl.com (union of all results)
41rhsbl.ahbl.org
38dsn.rfc-ignorant.org (zone not intended for this use)
30rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
30rhsbl.sorbs.net (union of all results)
27fresh.spameatingmonkey.net
27bogusmx.rfc-ignorant.org
25dob.sibl.support-intelligence.net
15hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
14porn.rhs.mailpolice.com
2bl.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
60369(total number of domains tested, including 166 at SDSC)
58046hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
10692(union of most domain zones)
6577hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3373whois.rfc-ignorant.org (union of all results)
3142whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3020hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2816abuse.rfc-ignorant.org
2699urired.spameatingmonkey.net
2003hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1680postmaster.rfc-ignorant.org
1157l1.apews.org
1111bogusmx.rfc-ignorant.org
785hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
635multi.surbl.org
633multi.uribl.com (union of all results)
624dbl.spamhaus.org
621multi.uribl.com (result 127.0.0.2 = spam resource)
550webmail.rhs.mailpolice.com
426hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
301dsn.rfc-ignorant.org
280adv.rhs.mailpolice.com
231whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
134porn.rhs.mailpolice.com
54bulk.rhs.mailpolice.com
42hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
33hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
24rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
24rhsbl.sorbs.net (union of all results)
21hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
20rhsbl.ahbl.org
19dynamic.rhs.mailpolice.com
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10dob.sibl.support-intelligence.net
10ex.dnsbl.org
9fresh.spameatingmonkey.net
3fraud.rhs.mailpolice.com
3hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
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 6 May 2010.