Blacklists Compared

31 July 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
207284(total number of IP addresses tested, including 170 at SDSC)
204335(union of most IP zones)
192600zen.spamhaus.org (union of all results)
182756b.barracudacentral.org
172658cbl.abuseat.org
172636zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
166740l2.apews.org
148879hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
145113psbl.surriel.com
144254dnsbl-1.uceprotect.net
139341bl.spameatingmonkey.net
133023dnsbl-2.uceprotect.net
128940dnsbl-3.uceprotect.net
126063bl.mailspike.net (union of all results)
119491ubl.unsubscore.com
111840zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
103456dnsbl.sorbs.net (union of all results)
89322bl.tiopan.com
84439hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
80302spam.dnsbl.sorbs.net
64286bl.score.senderscore.com
64074bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
63335dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
61716bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
57645blackholes.five-ten-sg.com (union of all results)
53306dnsbl.sorbs.net (result 127.0.0.10 = dialup)
51482bl.spamcop.net
47771db.wpbl.info
47136blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
40708zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
33548ix.dnsbl.manitu.net
25438no-more-funn.moensted.dk (union of all results)
24426mail-abuse.blacklist.jippg.org
23284bl.mailspike.net (result 127.0.0.11 = very bad reputation)
20313dnsbl.inps.de
19361no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
18090bl.mailspike.net (result 127.0.0.12 = bad reputation)
15124hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
9224blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
8188dnsbl.sorbs.net (result 127.0.0.6 = spam source)
6055dnsbl.ahbl.org (union of all results)
5756no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
5147bl.spamcannibal.org
5124korea.services.net
4775dnsbl.ahbl.org (result 127.0.0.4 = spam source)
4480ips.backscatterer.org
4175list.dnswl.org (not a blacklist!)
3972spamsources.fabel.dk
3587hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2902wl.mailspike.net (union of all results) (not a blacklist!)
1918hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1857wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1855dnsbl.njabl.org (union of all results)
1656dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1496tr.countries.nerd.dk
1244blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1215dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1008wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
895hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
538accredit.habeas.com (not a blacklist!)
439aspews.ext.sorbs.net
434query.bondedsender.org (not a blacklist!)
407zen.spamhaus.org (union of SBL and SBLCSS results)
403zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
280no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
195l2.bbfh.ext.sorbs.net
146iadb2.isipp.com (not a blacklist!)
145tor.dnsbl.sectoor.de (union of all results)
141tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
135no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
129dnsbl.njabl.org (result 127.0.0.2 = open relay)
115iadb.isipp.com (not a blacklist!)
93hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
91l1.bbfh.ext.sorbs.net
73no-more-funn.moensted.dk (result 127.0.0.9 = misc)
70dnsbl.njabl.org (result 127.0.0.4 = spam source)
65dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
55bl.deadbeef.com
39blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
37wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
19dnsbl-0.uceprotect.net
15zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
12spamguard.leadmon.net (union of all results)
11spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
7multi.uribl.com (result 127.0.0.2 = spam resource)
7multi.surbl.org
7multi.uribl.com (union of all results)
5hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
4tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
4dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
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
207284(total number of IP addresses whose names were tested, including 170 at SDSC)
131617hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
117990hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
102073(union of most domain zones)
89601l1.apews.org
82912abuse.rfc-ignorant.org
34589whois.rfc-ignorant.org (union of all results)
24457whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
12756hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
10132whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5971hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
4357hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
604hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
603hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
428dbl.spamhaus.org
419urired.spameatingmonkey.net
283hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
146hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
69postmaster.rfc-ignorant.org
68rhsbl.ahbl.org
63rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
63rhsbl.sorbs.net (union of all results)
41dsn.rfc-ignorant.org (zone not intended for this use)
41bogusmx.rfc-ignorant.org
25multi.uribl.com (result 127.0.0.2 = spam resource)
25multi.uribl.com (union of all results)
17hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
12multi.surbl.org
4fresh.spameatingmonkey.net
4bl.deadbeef.com
3dob.sibl.support-intelligence.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
60643(total number of domains tested, including 156 at SDSC)
56903hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
10920(union of most domain zones)
5801hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3443whois.rfc-ignorant.org (union of all results)
3158whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2896abuse.rfc-ignorant.org
2799urired.spameatingmonkey.net
2769hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2713hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1893hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
1817postmaster.rfc-ignorant.org
1286hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1212dbl.spamhaus.org
1044multi.surbl.org
855bogusmx.rfc-ignorant.org
646hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
604multi.uribl.com (union of all results)
594multi.uribl.com (result 127.0.0.2 = spam resource)
351dsn.rfc-ignorant.org
285whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
42rhsbl.ahbl.org
33hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
23rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
23hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
23rhsbl.sorbs.net (union of all results)
16hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
13ex.dnsbl.org
9multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
2bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1dob.sibl.support-intelligence.net
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 6 August 2010.