Blacklists Compared

7 February 2009

[ 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
59974(total number of IP addresses tested, including 200 at SDSC)
55864(union of most IP zones)
45491zen.spamhaus.org (union of all results)
44647l2.apews.org
41049t1.dnsbl.net.au
38736b.barracudacentral.org
36244cbl.abuseat.org
36211zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
27845zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
27556dnsbl-3.uceprotect.net
24106dnsbl-1.uceprotect.net
23940dnsbl-2.uceprotect.net
22713hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
18788dnsbl.sorbs.net (union of all results)
16007blackholes.five-ten-sg.com (union of all results)
15716no-more-funn.moensted.dk (union of all results)
13005blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
12899ubl.unsubscore.com
12533dnsbl.sorbs.net (result 127.0.0.10 = dialup)
9619no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
9356db.wpbl.info
8860bl.spamcop.net
7691zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6712spam.dnsbl.sorbs.net
6160dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
5964ix.dnsbl.manitu.net
4897no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
4358psbl.surriel.com
4000dnsbl.inps.de
3895bl.spamcannibal.org
3720list.dnswl.org (not a blacklist!)
3679countries.blackholes.us (result 127.1.5.6 = China)
3044tr.countries.nerd.dk
2670hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2275countries.blackholes.us (result 127.0.7.6 = Brazil)
2255hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2117korea.services.net
2062countries.blackholes.us (result 127.7.9.2 = Turkey)
2037countries.blackholes.us (result 127.6.4.3 = Russia)
1917blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
1893spamsources.fabel.dk
1619ips.backscatterer.org
1580countries.blackholes.us (result 127.4.1.0 = Korea)
1266countries.blackholes.us (result 127.7.6.4 = Thailand)
1128dnsbl.njabl.org (union of all results)
1053blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
991no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
988mail-abuse.blacklist.jippg.org
880dnsbl.njabl.org (result 127.0.0.9 = open proxy)
750aspews.ext.sorbs.net
705rmst.dnsbl.net.au
648countries.blackholes.us (result 127.1.5.8 = Taiwan)
534countries.blackholes.us (result 127.0.3.2 = Argentina)
406countries.blackholes.us (result 127.3.9.2 = Japan)
340query.bondedsender.org (not a blacklist!)
294countries.blackholes.us (result 127.4.8.4 = Mexico)
225dnsbl.njabl.org (result 127.0.0.4 = spam source)
223accredit.habeas.com (not a blacklist!)
213zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
202dnsbl.ahbl.org (union of all results)
188no-more-funn.moensted.dk (result 127.0.0.9 = misc)
186hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
175countries.blackholes.us (result 127.3.4.4 = Hong Kong)
170dnsbl.ahbl.org (result 127.0.0.4 = spam source)
167iadb2.isipp.com (not a blacklist!)
166dnsbl.sorbs.net (result 127.0.0.6 = spam source)
128iadb.isipp.com (not a blacklist!)
104countries.blackholes.us (result 127.7.0.2 = Singapore)
93countries.blackholes.us (result 127.4.5.8 = Malaysia)
87zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
74no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
42bl.deadbeef.com
41probes.dnsbl.net.au
36l2.bbfh.ext.sorbs.net
32dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
32tor.dnsbl.sectoor.de (union of all results)
31tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
23dnsbl.njabl.org (result 127.0.0.2 = open relay)
21dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
20dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
19blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
17dnsbl-0.uceprotect.net
17spamguard.leadmon.net (union of all results)
14spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
13blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
12multi.surbl.org
6multi.uribl.com (result 127.0.0.2 = spam resource)
6multi.uribl.com (union of all results)
4dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
3countries.blackholes.us (result 127.5.6.6 = Nigeria)
3blackholes.brainerd.net
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1rdts.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1dob.sibl.support-intelligence.net


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

HitsDNS Zone
59974(total number of IP addresses whose names were tested, including 200 at SDSC)
30457(union of all domain zones)
22304l1.apews.org
20837abuse.rfc-ignorant.org
14574rddn.dnsbl.net.au
10160whois.rfc-ignorant.org (union of all results)
9535dynamic.rhs.mailpolice.com
5564whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4596whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
2158webmail.rhs.mailpolice.com
676adv.rhs.mailpolice.com
620rhsbl.ahbl.org
208multi.surbl.org
141multi.uribl.com (union of all results)
140multi.uribl.com (result 127.0.0.2 = spam resource)
51postmaster.rfc-ignorant.org
42bulk.rhs.mailpolice.com
41dsn.rfc-ignorant.org (zone not intended for this use)
39bogusmx.rfc-ignorant.org
32dob.sibl.support-intelligence.net
11porn.rhs.mailpolice.com
9rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
9rhsbl.sorbs.net (union of all results)
4bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)


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

HitsDNS Zone
39757(total number of domains tested, including 172 at SDSC)
13801(union of all domain zones)
7805whois.rfc-ignorant.org (union of all results)
7350whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2219abuse.rfc-ignorant.org
1794bogusmx.rfc-ignorant.org
1371postmaster.rfc-ignorant.org
1079multi.surbl.org
981multi.uribl.com (union of all results)
957multi.uribl.com (result 127.0.0.2 = spam resource)
939l1.apews.org
749webmail.rhs.mailpolice.com
455whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
378dsn.rfc-ignorant.org
257adv.rhs.mailpolice.com
158rhsbl.ahbl.org
134porn.rhs.mailpolice.com
107bulk.rhs.mailpolice.com
33rddn.dnsbl.net.au (zone not intended for this use)
32rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
32rhsbl.sorbs.net (union of all results)
23multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
14dynamic.rhs.mailpolice.com
14ex.dnsbl.org
11dob.sibl.support-intelligence.net
4fraud.rhs.mailpolice.com
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 12 February 2009.