Blacklists Compared

4 September 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
169035(total number of IP addresses tested, including 157 at SDSC)
165806(union of most IP zones)
154413zen.spamhaus.org (union of all results)
142731b.barracudacentral.org
139878cbl.abuseat.org
139865zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
139466l2.apews.org
119668dnsbl-1.uceprotect.net
112124dnsbl-2.uceprotect.net
111071dnsbl-3.uceprotect.net
107191psbl.surriel.com
107072hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
96975zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
93386bl.spameatingmonkey.net
89872dnsbl.sorbs.net (union of all results)
79739bl.tiopan.com
70558bl.mailspike.net (union of all results)
66484spam.dnsbl.sorbs.net
62503hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
61864dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
57173ubl.unsubscore.com
47577blackholes.five-ten-sg.com (union of all results)
43881bl.score.senderscore.com
38293blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
37790dnsbl.sorbs.net (result 127.0.0.10 = dialup)
35705db.wpbl.info
33729bl.spamcop.net
28961bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
27086zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
21284ix.dnsbl.manitu.net
20424no-more-funn.moensted.dk (union of all results)
18724bl.mailspike.net (result 127.0.0.11 = very bad reputation)
17470bl.mailspike.net (result 127.0.0.12 = bad reputation)
17366bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
17112dnsbl.inps.de
16453mail-abuse.blacklist.jippg.org
15666no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
9586hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8004blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
6633dnsbl.sorbs.net (result 127.0.0.6 = spam source)
5901ips.backscatterer.org
5575dnsbl.ahbl.org (union of all results)
4810dnsbl.ahbl.org (result 127.0.0.4 = spam source)
4536wl.mailspike.net (union of all results) (not a blacklist!)
4317list.dnswl.org (not a blacklist!)
4249no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
4057bl.spamcannibal.org
3652korea.services.net
3378spamsources.fabel.dk
3373hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2026hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1685wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1600tr.countries.nerd.dk
1586dnsbl.njabl.org (union of all results)
1553wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1375dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1293wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
1258blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
929l2.bbfh.ext.sorbs.net
880hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
717dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
539accredit.habeas.com (not a blacklist!)
483l1.bbfh.ext.sorbs.net
437query.bondedsender.org (not a blacklist!)
424aspews.ext.sorbs.net
313no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
237zen.spamhaus.org (union of SBL and SBLCSS results)
234zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
214no-more-funn.moensted.dk (result 127.0.0.9 = misc)
160iadb2.isipp.com (not a blacklist!)
151tor.dnsbl.sectoor.de (union of all results)
148tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
133iadb.isipp.com (not a blacklist!)
129dnsbl.njabl.org (result 127.0.0.2 = open relay)
94no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
82dnsbl.njabl.org (result 127.0.0.4 = spam source)
54hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
48dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
40bl.deadbeef.com
21blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
13spamguard.leadmon.net (union of all results)
10spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
9dnsbl-0.uceprotect.net
7zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
6multi.surbl.org
5wl.mailspike.net (result 127.0.0.20 = excellent reputation) (not a blacklist!)
4multi.uribl.com (result 127.0.0.2 = spam resource)
4hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
4multi.uribl.com (union of all results)
3zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
3tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
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
169035(total number of IP addresses whose names were tested, including 157 at SDSC)
100153hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
90199hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
83455(union of most domain zones)
72145l1.apews.org
69361abuse.rfc-ignorant.org
31059whois.rfc-ignorant.org (union of all results)
21491whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
10286hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
9568whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
3825hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2448hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
614hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
434urired.spameatingmonkey.net
430dbl.spamhaus.org
276hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
254hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
172dob.sibl.support-intelligence.net
72hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
65rhsbl.ahbl.org
62rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
62rhsbl.sorbs.net (union of all results)
56postmaster.rfc-ignorant.org
40bogusmx.rfc-ignorant.org
34dsn.rfc-ignorant.org (zone not intended for this use)
26multi.surbl.org
20fresh.spameatingmonkey.net
19hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
15multi.uribl.com (result 127.0.0.2 = spam resource)
15multi.uribl.com (union of all results)
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
28110(total number of domains tested, including 139 at SDSC)
24786hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7972(union of most domain zones)
5412hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2897whois.rfc-ignorant.org (union of all results)
2688whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2609hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2415abuse.rfc-ignorant.org
2325hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1545postmaster.rfc-ignorant.org
1445urired.spameatingmonkey.net
1430dbl.spamhaus.org
1145hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
948l1.apews.org
946multi.surbl.org
842hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
510multi.uribl.com (union of all results)
502multi.uribl.com (result 127.0.0.2 = spam resource)
435bogusmx.rfc-ignorant.org
337hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
257dsn.rfc-ignorant.org
209whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
33fresh.spameatingmonkey.net
33dob.sibl.support-intelligence.net
33rhsbl.ahbl.org
22hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
21rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
21rhsbl.sorbs.net (union of all results)
12hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
12hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
11ex.dnsbl.org
8multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
1bl.deadbeef.com
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 9 September 2010.