Blacklists Compared

28 June 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
154028(total number of IP addresses tested, including 474 at SDSC)
146040(union of most IP zones)
123862zen.spamhaus.org (union of all results)
120926l2.apews.org
107714t1.dnsbl.net.au
78601dnsbl-3.uceprotect.net
78354zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
78089cbl.abuseat.org
77982zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
73114dnsbl-2.uceprotect.net
70378dnsbl-1.uceprotect.net
63122psbl.surriel.com
57720hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
56883dnsbl.sorbs.net (union of all results)
48750no-more-funn.moensted.dk (union of all results)
47838dnsbl.sorbs.net (result 127.0.0.10 = dialup)
46685blackholes.five-ten-sg.com (union of all results)
41869blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
36876no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
29155ix.dnsbl.manitu.net
27010ubl.unsubscore.com
24752bl.spamcop.net
23504db.wpbl.info
22525zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
12012spam.dnsbl.sorbs.net
11252no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
9784bl.spamcannibal.org
9078countries.blackholes.us (result 127.6.4.3 = Russia)
8482dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
8343countries.blackholes.us (result 127.1.5.6 = China)
7879tr.countries.nerd.dk
7611countries.blackholes.us (result 127.0.7.6 = Brazil)
7341hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
7133dnsbl.inps.de
6070countries.blackholes.us (result 127.7.9.2 = Turkey)
5973ips.backscatterer.org
5825mail-abuse.blacklist.jippg.org
4369rmst.dnsbl.net.au
4331korea.services.net
4279list.dnswl.org (not a blacklist!)
3624blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
3587countries.blackholes.us (result 127.4.1.0 = Korea)
3344dnsbl.njabl.org (union of all results)
3180sbl.csma.biz
2900dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2864bl.csma.biz
2759countries.blackholes.us (result 127.0.3.2 = Argentina)
2625spamsources.fabel.dk
2247hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2155countries.blackholes.us (result 127.7.6.4 = Thailand)
1858dnsbl.ahbl.org (union of all results)
1669dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1234countries.blackholes.us (result 127.4.8.4 = Mexico)
1160countries.blackholes.us (result 127.3.9.2 = Japan)
1143blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
916dnsbl.sorbs.net (result 127.0.0.6 = spam source)
859aspews.ext.sorbs.net
765countries.blackholes.us (result 127.1.5.8 = Taiwan)
697zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
498hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
476zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
420no-more-funn.moensted.dk (result 127.0.0.9 = misc)
384dnsbl.njabl.org (result 127.0.0.4 = spam source)
327countries.blackholes.us (result 127.3.4.4 = Hong Kong)
291countries.blackholes.us (result 127.7.0.2 = Singapore)
284countries.blackholes.us (result 127.4.5.8 = Malaysia)
277work.drbl.croco.net
276probes.dnsbl.net.au
274query.bondedsender.org (not a blacklist!)
183accredit.habeas.com (not a blacklist!)
181iadb2.isipp.com (not a blacklist!)
181no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
164iadb.isipp.com (not a blacklist!)
150tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
150tor.dnsbl.sectoor.de (union of all results)
147bl.deadbeef.com
108multi.surbl.org
108no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
103dnsbl.ahbl.org (result 127.0.0.4 = spam source)
95dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
94dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
60dnsbl.njabl.org (result 127.0.0.2 = open relay)
31exemptions.ahbl.org (not a blacklist!)
30countries.blackholes.us (result 127.5.6.6 = Nigeria)
28dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
27dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
25blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
24dnsbl.ahbl.org (result 127.0.0.15 = open relay)
23blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
22dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
18multi.uribl.com (union of all results)
16multi.uribl.com (result 127.0.0.2 = spam resource)
13rdts.dnsbl.net.au
10spam.wytnij.to
10spamguard.leadmon.net (union of all results)
5dnsbl.sorbs.net (result 127.0.0.5 = open relay)
5spamguard.leadmon.net (result 127.0.0.8 = open proxy)
4spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
4dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
2blackholes.brainerd.net
2dnsbl.ahbl.org (result 127.0.0.11 = no postmaster or abuse e-mail)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1ohps.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
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
154028(total number of IP addresses whose names were tested, including 474 at SDSC)
88877(union of all domain zones)
67930l1.apews.org
62899abuse.rfc-ignorant.org
51223rddn.dnsbl.net.au
32878dynamic.rhs.mailpolice.com
31566whois.rfc-ignorant.org (union of all results)
21062whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
10504whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
6058webmail.rhs.mailpolice.com
579adv.rhs.mailpolice.com
429multi.surbl.org
367multi.uribl.com (union of all results)
366multi.uribl.com (result 127.0.0.2 = spam resource)
337bl.deadbeef.com
116bogusmx.rfc-ignorant.org
85postmaster.rfc-ignorant.org
81rhsbl.ahbl.org
78bulk.rhs.mailpolice.com
61dsn.rfc-ignorant.org (zone not intended for this use)
48dob.sibl.support-intelligence.net
40rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
40rhsbl.sorbs.net (union of all results)
16porn.rhs.mailpolice.com
1multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
1ex.dnsbl.org


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

HitsDNS Zone
141874(total number of domains tested, including 413 at SDSC)
31285(union of all domain zones)
16036whois.rfc-ignorant.org (union of all results)
15405whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6782bogusmx.rfc-ignorant.org
4588abuse.rfc-ignorant.org
2655postmaster.rfc-ignorant.org
1937multi.surbl.org
1638multi.uribl.com (union of all results)
1578multi.uribl.com (result 127.0.0.2 = spam resource)
1572l1.apews.org
1218webmail.rhs.mailpolice.com
1011dsn.rfc-ignorant.org
631whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
533porn.rhs.mailpolice.com
297adv.rhs.mailpolice.com
186rhsbl.ahbl.org
178bulk.rhs.mailpolice.com
92dob.sibl.support-intelligence.net
91rddn.dnsbl.net.au (zone not intended for this use)
80dynamic.rhs.mailpolice.com
59multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
39rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
39rhsbl.sorbs.net (union of all results)
12ex.dnsbl.org
6bl.deadbeef.com
3fraud.rhs.mailpolice.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 4 July 2008.