Blacklists Compared

16 February 2008

[ 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 (127.0.0.1 result), exemptions.ahbl.org, query.bondedsender.org, list.dnswl.org, accredit.habeas.com, iadb.isipp.com, and iadb2.isipp.com 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
208853(total number of IP addresses tested, including 465 at SDSC)
192848(union of most IP zones)
170473l2.apews.org
157322zen.spamhaus.org (union of all results)
148276t1.dnsbl.net.au
113095cbl.abuseat.org
113024zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
97266zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
90942dnsbl-3.uceprotect.net
89422psbl.surriel.com
87753dnsbl-2.uceprotect.net
82079dnsbl-1.uceprotect.net
80180dnsbl.sorbs.net (union of all results)
75522no-more-funn.moensted.dk (union of all results)
72137dnsbl.sorbs.net (result 127.0.0.10 = dialup)
68997blackholes.five-ten-sg.com (union of all results)
68836ubl.unsubscore.com
63247blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
62516no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
60148hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
50678sbl.csma.biz
44127bl.csma.biz
37788bl.spamcop.net
31511ix.dnsbl.manitu.net
27721zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
23137db.wpbl.info
13058ips.backscatterer.org
12132unconfirmed.dsbl.org
11971list.dsbl.org
11967dsbl.dnsbl.net.au
11925bl.spamcannibal.org
11839no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
11381tr.countries.nerd.dk
9569countries.blackholes.us (result 127.7.9.2 = Turkey)
7894mail-abuse.blacklist.jippg.org
7738dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
7601countries.blackholes.us (result 127.0.7.6 = Brazil)
7529korea.services.net
6848countries.blackholes.us (result 127.4.1.0 = Korea)
6267rmst.dnsbl.net.au
5892countries.blackholes.us (result 127.1.5.6 = China)
5694countries.blackholes.us (result 127.6.4.3 = Russia)
5326list.dnswl.org (not a blacklist!)
4589blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
3714dnsbl.njabl.org (union of all results)
3477dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3303countries.blackholes.us (result 127.3.9.2 = Japan)
2959countries.blackholes.us (result 127.0.3.2 = Argentina)
2554hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2407countries.blackholes.us (result 127.4.8.4 = Mexico)
2288dnsbl.ahbl.org (union of all results)
2285aspews.ext.sorbs.net
2163spamsources.fabel.dk
2098dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1362countries.blackholes.us (result 127.7.6.4 = Thailand)
1075blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
803countries.blackholes.us (result 127.4.5.8 = Malaysia)
751hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
741zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
689zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
645no-more-funn.moensted.dk (result 127.0.0.9 = misc)
628countries.blackholes.us (result 127.1.5.8 = Taiwan)
615probes.dnsbl.net.au
518countries.blackholes.us (result 127.3.4.4 = Hong Kong)
402no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
362countries.blackholes.us (result 127.7.0.2 = Singapore)
348dnsbl.sorbs.net (result 127.0.0.6 = spam source)
286bl.deadbeef.com
223work.drbl.croco.net
214dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
202dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
202query.bondedsender.org (not a blacklist!)
185accredit.habeas.com (not a blacklist!)
154no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
145iadb2.isipp.com (not a blacklist!)
140iadb.isipp.com (not a blacklist!)
133dnsbl.njabl.org (result 127.0.0.4 = spam source)
132multi.surbl.org
132hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
126multihop.dsbl.org
113dnsbl.ahbl.org (result 127.0.0.4 = spam source)
104dnsbl.njabl.org (result 127.0.0.2 = open relay)
75exemptions.ahbl.org (not a blacklist!)
66relays.nether.net
54blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
41dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
39dnsbl.ahbl.org (result 127.0.0.15 = open relay)
29multi.uribl.com (result 127.0.0.2 = spam resource)
29multi.uribl.com (union of all results)
28blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
27countries.blackholes.us (result 127.5.6.6 = Nigeria)
20rdts.dnsbl.net.au
18spamguard.leadmon.net (union of all results)
16spam.wytnij.to
16dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
10spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
10dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
8dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
6blackholes.brainerd.net
4ohps.dnsbl.net.au
4spamguard.leadmon.net (result 127.0.0.3 = spam source)
4spamguard.leadmon.net (result 127.0.0.8 = open proxy)
4blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3dnsbl.ahbl.org (result 127.0.0.11 = no postmaster or abuse e-mail)
2owps.dnsbl.net.au
2osrs.dnsbl.net.au
2no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1dob.sibl.support-intelligence.net
1dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses.

HitsDNS Zone
208853(total number of IP addresses whose names were tested, including 465 at SDSC)
127277(union of all domain zones)
106001l1.apews.org
79879abuse.rfc-ignorant.org
75880rddn.dnsbl.net.au
51816whois.rfc-ignorant.org (union of all results)
35492whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
30846dynamic.rhs.mailpolice.com
16324whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
5058webmail.rhs.mailpolice.com
843multi.surbl.org
816multi.uribl.com (union of all results)
815multi.uribl.com (result 127.0.0.2 = spam resource)
168adv.rhs.mailpolice.com
128dob.sibl.support-intelligence.net
128bl.deadbeef.com
116postmaster.rfc-ignorant.org
107rhsbl.ahbl.org
96bogusmx.rfc-ignorant.org
77dsn.rfc-ignorant.org (zone not intended for this use)
24bulk.rhs.mailpolice.com
16rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
16rhsbl.sorbs.net (union of all results)
15porn.rhs.mailpolice.com
1multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
1blackhole.securitysage.com


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains.

HitsDNS Zone
121529(total number of domains tested, including 422 at SDSC)
29876(union of all domain zones)
15614whois.rfc-ignorant.org (union of all results)
15016whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6258bogusmx.rfc-ignorant.org
3701abuse.rfc-ignorant.org
2346multi.surbl.org
2224multi.uribl.com (union of all results)
2155multi.uribl.com (result 127.0.0.2 = spam resource)
1732postmaster.rfc-ignorant.org
1379l1.apews.org
1040webmail.rhs.mailpolice.com
900dsn.rfc-ignorant.org
598whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
430porn.rhs.mailpolice.com
350dob.sibl.support-intelligence.net
224rhsbl.ahbl.org
220bulk.rhs.mailpolice.com
218adv.rhs.mailpolice.com
159blackhole.securitysage.com
66multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
63rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
63rhsbl.sorbs.net (union of all results)
36rddn.dnsbl.net.au (zone not intended for this use)
25dynamic.rhs.mailpolice.com
16ex.dnsbl.org
5bl.deadbeef.com
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2fraud.rhs.mailpolice.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 22 February 2008.