Blacklists Compared

3 May 2003

[ 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 xbl.selwerd.cx and block.blars.org zones zone because they are too aggressive to be widely useful, and the blocktest.relays.osirusoft.com and query.bondedsender.org zones are also excluded because they are not blacklists.

HitsDNS Zone
11419(total number of IP addresses tested, including 601 at SDSC)
7249(union of most IP zones)
5650xbl.selwerd.cx
3410t1.bl.reynolds.net.au
3086blackholes.five-ten-sg.com (union of all results)
2818blackholes.wirehub.net
2793block.blars.org
2426no-more-funn.moensted.dk (union of all results)
2198unconfirmed.dsbl.org
2062dnsbl.njabl.org (union of all results)
1924list.dsbl.org
1898relays.osirusoft.com (union of all results)
1751dnsbl.sorbs.net (union of all results)
1728bl.spamcop.net
1704blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
1686proxies.blackholes.wirehub.net
1519proxies.relays.monkeys.com (union of all results)
1518proxies.relays.monkeys.com (result 127.0.0.2 = open proxy)
1272dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
1260opm.blitzed.org
1235cn-kr.blackholes.us (union of all results)
1188dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1183no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
1158dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
1083ztl.dorkslayers.com
941blocktest.relays.osirusoft.com (not a blacklist!)
909blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
905spews.bl.reynolds.net.au
880spews.relays.osirusoft.com
863relays.osirusoft.com (result 127.0.0.4 = spam source)
822ipwhois.rfc-ignorant.org
690no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
655blackholes.intersil.net
634sbl.spamhaus.org
620cn-kr.blackholes.us (result 127.0.0.2 = China)
620china.blackholes.us
618spam.dnsrbl.net
616korea.blackholes.us
615cn-kr.blackholes.us (result 127.0.0.3 = Korea)
607korea.services.net
601cw.blackholes.us
601spamhaus.relays.osirusoft.com
575ybl.megacity.org
558work.drbl.croco.net
545relays.osirusoft.com (result 127.0.0.6 = spamsites)
467relays.osirusoft.com (result 127.0.0.9 = open proxy)
466dnsbl.delink.net
458socks.relays.osirusoft.com
448spamsources.fabel.dk
445dnsbl.njabl.org (result 127.0.0.4 = spam source)
378blacklist.spambag.org
364blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
336spam.wytnij.to
280mail-abuse.blacklist.jippg.org
278dnsbl.njabl.org (result 127.0.0.2 = source or relay)
277no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
269level3.blackholes.us
249flowgoaway.com
244sbbl.they.com
227spamguard.leadmon.net (union of all results)
220blackholes.uceb.org (union of all results)
209relays.osirusoft.com (result 127.0.0.2 = relay)
209multihop.dsbl.org
208inputs.relays.osirusoft.com
204spamguard.leadmon.net (result 127.0.0.2 = dialup)
174brazil.blackholes.us
169dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
164spamsources.relays.osirusoft.com (union of all results)
161dun.dnsrbl.net
159verio.blackholes.us
157dynablock.wirehub.net (result 127.0.0.2 = dialup)
157dynablock.wirehub.net (union of all results)
151spamsources.relays.osirusoft.com (result 127.0.0.4 = spam source)
151dnsbl.njabl.org (result 127.0.0.3 = dialup)
148query.bondedsender.org (not a blacklist!)
146blackhole.compu.net
137rr.blackholes.us
1373y.spam.mrs.kithrup.com
129blackholes.uceb.org (result 127.0.0.3 = spam source)
129relays.bl.kundenserver.de
126dialups.visi.com
124taiwan.blackholes.us
123dialups.relays.osirusoft.com (union of all results)
117no-more-funn.moensted.dk (result 127.0.0.9 = misc)
116dialups.relays.osirusoft.com (result 127.0.0.3 = dialup)
114no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
92xo.blackholes.us
88relays.osirusoft.com (result 127.0.0.3 = dialup)
87bl.deadbeef.com
84internap.blackholes.us
83japan.blackholes.us
83dnsbl.sorbs.net (result 127.0.0.6 = spam source)
82argentina.blackholes.us
79qwest.blackholes.us
75vox.schpider.com
75relays.ordb.org
74hongkong.blackholes.us
72bl.deadbeef.com
69orbs.dorkslayers.com
65blackholes.five-ten-sg.com (result 127.0.0.5 = relay output)
60charter.blackholes.us
59blackholes.uceb.org (result 127.0.0.2 = relay)
59blackholes.brainerd.net
56tr.countries.nerd.dk
49russia.blackholes.us
42inflow.blackholes.us
41interbusiness.blackholes.us
36proxies.relays.osirusoft.com
31cybercon.blackholes.us
30rackspace.blackholes.us
28above.blackholes.us
27blackholes.uceb.org (result 127.0.0.8 = spam source with fake sender)
26blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
26spam.exsilia.net (union of all results)
25he.blackholes.us
25no-more-funn.moensted.dk (result 127.0.0.5 = relay output)
23infolink.blackholes.us
23spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
23spam.exsilia.net (result 127.0.0.2 = spam source)
21singapore.blackholes.us
20wanadoo-fr.blackholes.us
20nigeria.blackholes.us
17telstra.blackholes.us
17dialup.blacklist.jippg.org (result 127.0.0.3 = dialup outside Japan)
17dialup.blacklist.jippg.org (union of all results)
16yipes.blackholes.us
16covad.blackholes.us
15relays.dorkslayers.com
14spammers.v6net.org
13malaysia.blackholes.us
13broadwing.blackholes.us
13no-more-funn.moensted.dk (result 127.0.0.8 = open web form)
13blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
13ph.rbl.cluecentral.net
12valuenet.blackholes.us
11eli.blackholes.us
11spamsources.relays.osirusoft.com (result 127.0.0.6 = spamhaus)
10thailand.blackholes.us
8hostnoc.blackholes.us
7maxim.blackholes.us
7epoch.blackholes.us
7dialups.relays.osirusoft.com (result 127.0.0.4 = no reverse DNS)
7no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
6pajo.blackholes.us
6blackholes.uceb.org (result 127.0.0.4 = spam source network)
5affinity.blackholes.us
5dev.null.dk
4olm.blackholes.us
4blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
3dnsbl.sorbs.net (result 127.0.0.7 = open formmail.cgi)
3spamsources.relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
3spamsites.relays.osirusoft.com (result 127.0.0.6)
3spam.exsilia.net (result 127.0.0.3 = virus source)
3spamsites.relays.osirusoft.com (union of all results)
2valueweb.blackholes.us
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2relays.osirusoft.com (result 127.0.0.7 = unconfirmed opt-in)
1skynetweb.blackholes.us
1blackholes.uceb.org (result 127.0.0.6 = spam haven)
1proxies.relays.monkeys.com (result 127.0.0.3 = proxy output)
1blackholes.five-ten-sg.com (result 127.0.0.6 = 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. The blackhole.compu.net zone "is primarily for hosts which were not blocked by other blackhole sites and spammed compu.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
11419(total number of IP addresses whose names were tested, including 601 at SDSC)
2499(union of all domain zones)
2121abuse.rfc-ignorant.org
564whois.rfc-ignorant.org (union of all results)
340whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
224whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
9postmaster.rfc-ignorant.org
8dsn.rfc-ignorant.org (zone not intended for this use)

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

HitsDNS Zone
7058(total number of domains tested, including 301 at SDSC)
1315(union of all domain zones)
640abuse.rfc-ignorant.org
521whois.rfc-ignorant.org (union of all results)
364whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
352postmaster.rfc-ignorant.org
275dsn.rfc-ignorant.org
157whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
71bl.deadbeef.com
24ex.dnsbl.org (union of all results)
22ex.dnsbl.org (result 127.0.0.2 = spamsites)
6bandwidth-pigs.monkeys.com
5in.dnsbl.org (union of all results)
4in.dnsbl.org (result 127.0.0.6 = unconfirmed opt-in)
2ex.dnsbl.org (result 127.0.0.3 = spam source)
1in.dnsbl.org (result 127.0.0.2 = spam source)

This document was last updated by Jeff Makey <jeff@sdsc.edu> on 7 May 2003.