Blacklists Compared

3 July 2004

[ 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 exemptions.ahbl.org and query.bondedsender.org zones because they are not blacklists, and because it is too aggressive to be widely useful the block.blars.org zone is also excluded.

HitsDNS Zone
24905(total number of IP addresses tested, including 376 at SDSC)
19484(union of most IP zones)
14383t1.dnsbl.net.au
13858block.blars.org
12402blackholes.five-ten-sg.com (union of all results)
11675blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
10537sbl-xbl.spamhaus.org (union of all results)
9836dnsbl.sorbs.net (union of all results)
9389xbl.spamhaus.org (union of all results)
9386cbl.abuseat.org
9367xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
9367sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
6760unconfirmed.dsbl.org
6692dynablock.njabl.org
6651list.dsbl.org
6605dsbl.dnsbl.net.au
6482dnsbl.sorbs.net (result 127.0.0.10 = dialup)
6481no-more-funn.moensted.dk (union of all results)
5128cn-kr.blackholes.us (union of all results)
3803bl.spamcop.net
3651ipwhois.rfc-ignorant.org
3597sbl.csma.biz
3386dnsbl.njabl.org (union of all results)
3213no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2936cn-kr.blackholes.us (result 127.0.0.3 = Korea)
2936korea.blackholes.us
2767dnsbl.ahbl.org (union of all results)
2650korea.services.net
2619l2.spews.dnsbl.sorbs.net
2583rmst.dnsbl.net.au
2495wpbl.dnsbl.net.au
2243l1.spews.dnsbl.sorbs.net
2192cn-kr.blackholes.us (result 127.0.0.2 = China)
2192china.blackholes.us
2189spews.dnsbl.net.au
1963blacklist.spambag.org
1917dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1671dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1627no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1574pdl.blackholes.us
1497dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1418spamsources.fabel.dk
1356dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1346unsure.nether.net
1242sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
1242sbl.spamhaus.org
1120bl.csma.biz
1109spam.wytnij.to
1102ricn.dnsbl.net.au
1032dnsbl.njabl.org (result 127.0.0.3 = dialup)
996dnsbl.ahbl.org (result 127.0.0.4 = spam source)
923opm.blitzed.org
916sbl-xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
913xbl.spamhaus.org (result 127.0.0.6 = Blitzed Open Proxy Monitor List)
905dnsbl.sorbs.net (result 127.0.0.6 = spam source)
796work.drbl.croco.net
738no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
699no-more-funn.moensted.dk (result 127.0.0.9 = misc)
676comcast.blackholes.us
640spamguard.leadmon.net (union of all results)
616level3.blackholes.us
607probes.dnsbl.net.au
585dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
570spamguard.leadmon.net (result 127.0.0.2 = dialup)
564dun.dnsrbl.net
507ybl.megacity.org
479japan.blackholes.us
464brazil.blackholes.us
449dnsbl.antispam.or.id
448cw.blackholes.us
426blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
404taiwan.blackholes.us
389relays.visi.com
329rr.blackholes.us
285blackholes.intersil.net
256relays.ordb.org
251dnsbl.njabl.org (result 127.0.0.2 = source or relay)
251dnsbl.rangers.eu.org (union of all results)
242no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
240charter.blackholes.us
235hongkong.blackholes.us
225blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
212mexico.blackholes.us
194dnsbl.njabl.org (result 127.0.0.4 = spam source)
186turkey.blackholes.us
186tr.countries.nerd.dk
183dnsbl.rangers.eu.org (result 127.0.0.2 = dialup)
177qwest.blackholes.us
169dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
169psbl.surriel.com
162wanadoo-fr.blackholes.us
148dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
147verio.blackholes.us
139flowgoaway.com
138interbusiness.blackholes.us
133russia.blackholes.us
126infolink.blackholes.us
126argentina.blackholes.us
105ohps.dnsbl.net.au
105multihop.dsbl.org
89xo.blackholes.us
89malaysia.blackholes.us
89osrs.dnsbl.net.au
84dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
84dialup.blacklist.jippg.org (union of all results)
80osps.dnsbl.net.au
76singapore.blackholes.us
72internap.blackholes.us
72dnsbl.sorbs.net (result 127.0.0.5 = open relay)
68spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
66above.blackholes.us
66relays.nether.net
64spamsources.yamta.org (result 127.0.0.2 = spam source)
62mail-abuse.blacklist.jippg.org
60he.blackholes.us
59ph.rbl.cluecentral.net
54dnsbl.rangers.eu.org (result 127.0.0.8 = spam source)
53telstra.blackholes.us
53bellsouth.blackholes.us
47inflow.blackholes.us
42blackholes.brainerd.net
40sbbl.they.com
39thailand.blackholes.us
35cybercon.blackholes.us
34covad.blackholes.us
31dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
28rogers.blackholes.us
28blackholes.uceb.org (union of all results)
27yipes.blackholes.us
26swbell.blackholes.us
26blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
25rdts.dnsbl.net.au
23nigeria.blackholes.us
23blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
23spam.dnsrbl.net
22hil.habeas.com
21query.bondedsender.org (not a blacklist!)
20rackspace.blackholes.us
20eli.blackholes.us
19satos.rbl.cluecentral.net
18exemptions.ahbl.org (not a blacklist!)
15blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
14dnsbl.rangers.eu.org (result 127.0.0.4 = virus notices)
13a2000.blackholes.us
13blackholes.uceb.org (result 127.0.0.2 = open relay)
12affinity.blackholes.us
12blackholes.uceb.org (result 127.0.0.3 = spam source)
9olm.blackholes.us
9broadwing.blackholes.us
9blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
9dnsbl.ahbl.org (result 127.0.0.11 = no postmaster or abuse e-mail)
8dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
7pajo.blackholes.us
7bl.deadbeef.com
6epoch.blackholes.us
6owps.dnsbl.net.au
6relays.bl.kundenserver.de
5navisite.blackholes.us
4maxim.blackholes.us
3dnsbl.ahbl.org (result 127.0.0.15 = open relay)
3dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
2blackholes.uceb.org (result 127.0.0.6 = spam haven)
2spamsites.dnsbl.net.au
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
2no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
2blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1spamsources.yamta.org (result 127.0.0.3 = repeated probes)
1ciberlynx.blackholes.us
1burst.blackholes.us
1blackholes.uceb.org (result 127.0.0.4 = spam source network)
1omrs.dnsbl.net.au
1dnsbl.njabl.org (result 127.0.0.8 = open formmail.cgi)
1no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
1no-more-funn.moensted.dk (result 127.0.0.11 = repeated probes)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)

The blackholes.intersil.net zone "lists entrenched spammers, mainsleaze and mainsleaze wannabes who have pestered users at Intersil." The flowgoaway.com zone lists FloNetwork systems.

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

HitsDNS Zone
24905(total number of IP addresses whose names were tested, including 376 at SDSC)
10731(union of all domain zones)
7968abuse.rfc-ignorant.org
5894rddn.dnsbl.net.au
3186whois.rfc-ignorant.org (union of all results)
2069whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1117whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
634bulk.rhs.mailpolice.com
552rhsbl.ahbl.org
230bl.deadbeef.com
183blackhole.securitysage.com
21porn.rhs.mailpolice.com
18postmaster.rfc-ignorant.org
16dsn.rfc-ignorant.org (zone not intended for this use)
1bogusmx.rfc-ignorant.org

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

HitsDNS Zone
21598(total number of domains tested, including 275 at SDSC)
6712(union of all domain zones)
2939whois.rfc-ignorant.org (union of all results)
2502whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2267abuse.rfc-ignorant.org
1126bulk.rhs.mailpolice.com
1036rhsbl.ahbl.org
942postmaster.rfc-ignorant.org
708dsn.rfc-ignorant.org
457blackhole.securitysage.com
437whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
296bogusmx.rfc-ignorant.org
173bl.deadbeef.com
50porn.rhs.mailpolice.com
50ex.dnsbl.org (union of all results)
48ex.dnsbl.org (result 127.0.0.2 = spamsites)
40rddn.dnsbl.net.au (zone not intended for this use)
34rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
34rhsbl.sorbs.net (union of all results)
2ex.dnsbl.org (result 127.0.0.3 = spam source)
1rhsbl.sorbs.net (result 127.0.0.12 = domain does not send mail)
1cart00ney.surriel.com

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 12 July 2004.