Blacklists Compared

10 May 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
176753(total number of IP addresses tested, including 477 at SDSC)
169563(union of most IP zones)
151945l2.apews.org
144480zen.spamhaus.org (union of all results)
125702t1.dnsbl.net.au
91245zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
87172dnsbl-3.uceprotect.net
86200cbl.abuseat.org
86135zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
85450dnsbl-1.uceprotect.net
83869dnsbl-2.uceprotect.net
80785psbl.surriel.com
71056hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
67420dnsbl.sorbs.net (union of all results)
64082no-more-funn.moensted.dk (union of all results)
61699blackholes.five-ten-sg.com (union of all results)
57944dnsbl.sorbs.net (result 127.0.0.10 = dialup)
56403blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
46351ubl.unsubscore.com
43800no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
35014bl.spamcop.net
33419ix.dnsbl.manitu.net
26667zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
22774sbl.csma.biz
22613bl.csma.biz
18610no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
17542db.wpbl.info
14968countries.blackholes.us (result 127.1.5.6 = China)
12771unconfirmed.dsbl.org
12665list.dsbl.org
12659dsbl.dnsbl.net.au
10423bl.spamcannibal.org
10047tr.countries.nerd.dk
9400countries.blackholes.us (result 127.6.4.3 = Russia)
9073dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
8925mail-abuse.blacklist.jippg.org
8065countries.blackholes.us (result 127.0.7.6 = Brazil)
7838countries.blackholes.us (result 127.7.9.2 = Turkey)
6519korea.services.net
6486ips.backscatterer.org
6434hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
5491countries.blackholes.us (result 127.4.1.0 = Korea)
4312list.dnswl.org (not a blacklist!)
4099blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4025dnsbl.njabl.org (union of all results)
3761dnsbl.njabl.org (result 127.0.0.9 = open proxy)
3562spamsources.fabel.dk
2877countries.blackholes.us (result 127.0.3.2 = Argentina)
2598dnsbl.ahbl.org (union of all results)
2397dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2360rmst.dnsbl.net.au
2247hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2047countries.blackholes.us (result 127.7.6.4 = Thailand)
1428countries.blackholes.us (result 127.4.8.4 = Mexico)
1392aspews.ext.sorbs.net
1340hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
1283no-more-funn.moensted.dk (result 127.0.0.9 = misc)
1144blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1128countries.blackholes.us (result 127.3.9.2 = Japan)
897zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
708countries.blackholes.us (result 127.1.5.8 = Taiwan)
499no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
467countries.blackholes.us (result 127.4.5.8 = Malaysia)
419zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
347dnsbl.sorbs.net (result 127.0.0.6 = spam source)
329probes.dnsbl.net.au
316countries.blackholes.us (result 127.3.4.4 = Hong Kong)
298countries.blackholes.us (result 127.7.0.2 = Singapore)
275query.bondedsender.org (not a blacklist!)
234dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
220work.drbl.croco.net
218dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
210accredit.habeas.com (not a blacklist!)
206dnsbl.njabl.org (result 127.0.0.4 = spam source)
205bl.deadbeef.com
192no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
186iadb2.isipp.com (not a blacklist!)
170iadb.isipp.com (not a blacklist!)
167tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
167tor.dnsbl.sectoor.de (union of all results)
105dnsbl.ahbl.org (result 127.0.0.4 = spam source)
97dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
82multihop.dsbl.org
74multi.surbl.org
63dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
57dnsbl.njabl.org (result 127.0.0.2 = open relay)
41relays.nether.net
37exemptions.ahbl.org (not a blacklist!)
33countries.blackholes.us (result 127.5.6.6 = Nigeria)
29blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
22blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
20dnsbl.ahbl.org (result 127.0.0.15 = open relay)
19rdts.dnsbl.net.au
15spamguard.leadmon.net (union of all results)
8spam.wytnij.to
8spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
8dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
6multi.uribl.com (result 127.0.0.2 = spam resource)
6multi.uribl.com (union of all results)
5ohps.dnsbl.net.au
5spamguard.leadmon.net (result 127.0.0.8 = open proxy)
4blackholes.brainerd.net
4dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2dnsbl.ahbl.org (result 127.0.0.11 = no postmaster or abuse e-mail)
1spamsites.dnsbl.net.au
1osps.dnsbl.net.au
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)
1dob.sibl.support-intelligence.net
1dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)


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

HitsDNS Zone
176753(total number of IP addresses whose names were tested, including 477 at SDSC)
101912(union of all domain zones)
84917l1.apews.org
71071abuse.rfc-ignorant.org
60130rddn.dnsbl.net.au
37900dynamic.rhs.mailpolice.com
37442whois.rfc-ignorant.org (union of all results)
25100whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
12342whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
6720webmail.rhs.mailpolice.com
759multi.surbl.org
668multi.uribl.com (union of all results)
667multi.uribl.com (result 127.0.0.2 = spam resource)
588adv.rhs.mailpolice.com
272bl.deadbeef.com
222bulk.rhs.mailpolice.com
139bogusmx.rfc-ignorant.org
90rhsbl.ahbl.org
82postmaster.rfc-ignorant.org
61dsn.rfc-ignorant.org (zone not intended for this use)
50dob.sibl.support-intelligence.net
34rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
34rhsbl.sorbs.net (union of all results)
17porn.rhs.mailpolice.com
1multi.uribl.com (result 127.0.0.4 = opt-out spam resource)


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

HitsDNS Zone
143351(total number of domains tested, including 444 at SDSC)
35601(union of all domain zones)
20207whois.rfc-ignorant.org (union of all results)
19530whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6344bogusmx.rfc-ignorant.org
4989abuse.rfc-ignorant.org
2185postmaster.rfc-ignorant.org
2098multi.surbl.org
1788multi.uribl.com (union of all results)
1735multi.uribl.com (result 127.0.0.2 = spam resource)
1723l1.apews.org
1270webmail.rhs.mailpolice.com
1043dsn.rfc-ignorant.org
677whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
567porn.rhs.mailpolice.com
253adv.rhs.mailpolice.com
217bulk.rhs.mailpolice.com
205rhsbl.ahbl.org
177blackhole.securitysage.com
107rddn.dnsbl.net.au (zone not intended for this use)
93dynamic.rhs.mailpolice.com
55rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
55rhsbl.sorbs.net (union of all results)
51multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
39dob.sibl.support-intelligence.net
14ex.dnsbl.org
4fraud.rhs.mailpolice.com
3bl.deadbeef.com
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 16 May 2008.