Blacklists Compared

6 December 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
69328(total number of IP addresses tested, including 485 at SDSC)
63812(union of most IP zones)
50820zen.spamhaus.org (union of all results)
50437l2.apews.org
45637t1.dnsbl.net.au
40891b.barracudacentral.org
40463cbl.abuseat.org
40422zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
32423zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
29072dnsbl-1.uceprotect.net
27499dnsbl-3.uceprotect.net
26113dnsbl-2.uceprotect.net
24297hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
20041ubl.unsubscore.com
19817blackholes.five-ten-sg.com (union of all results)
19549psbl.surriel.com
19138dnsbl.sorbs.net (union of all results)
18459no-more-funn.moensted.dk (union of all results)
16091blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
15059dnsbl.sorbs.net (result 127.0.0.10 = dialup)
10551no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
8487bl.spamcop.net
7109ix.dnsbl.manitu.net
6933zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
6920no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
6813spam.dnsbl.sorbs.net
6526countries.blackholes.us (result 127.1.5.6 = China)
4592list.dnswl.org (not a blacklist!)
4255db.wpbl.info
4147bl.spamcannibal.org
3988dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
3343dnsbl.inps.de
3009countries.blackholes.us (result 127.6.4.3 = Russia)
2967hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2891ips.backscatterer.org
2749spamsources.fabel.dk
2553tr.countries.nerd.dk
2518blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
2439countries.blackholes.us (result 127.0.7.6 = Brazil)
2054hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
1957korea.services.net
1794countries.blackholes.us (result 127.7.9.2 = Turkey)
1579countries.blackholes.us (result 127.4.1.0 = Korea)
1427mail-abuse.blacklist.jippg.org
1373dnsbl.njabl.org (union of all results)
1265rmst.dnsbl.net.au
1150blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1002dnsbl.njabl.org (result 127.0.0.9 = open proxy)
987aspews.ext.sorbs.net
847countries.blackholes.us (result 127.7.6.4 = Thailand)
709no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
580countries.blackholes.us (result 127.0.3.2 = Argentina)
527countries.blackholes.us (result 127.3.9.2 = Japan)
483zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
477countries.blackholes.us (result 127.1.5.8 = Taiwan)
330query.bondedsender.org (not a blacklist!)
326dnsbl.njabl.org (result 127.0.0.4 = spam source)
313hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
311countries.blackholes.us (result 127.4.8.4 = Mexico)
204accredit.habeas.com (not a blacklist!)
193no-more-funn.moensted.dk (result 127.0.0.9 = misc)
161iadb2.isipp.com (not a blacklist!)
148countries.blackholes.us (result 127.3.4.4 = Hong Kong)
127zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
124countries.blackholes.us (result 127.7.0.2 = Singapore)
124iadb.isipp.com (not a blacklist!)
106no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
98work.drbl.croco.net
93dnsbl.sorbs.net (result 127.0.0.6 = spam source)
63countries.blackholes.us (result 127.4.5.8 = Malaysia)
61tor.dnsbl.sectoor.de (union of all results)
60tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
60bl.deadbeef.com
58l2.bbfh.ext.sorbs.net
53probes.dnsbl.net.au
45dnsbl.njabl.org (result 127.0.0.2 = open relay)
33blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
29dnsbl.ahbl.org (union of all results)
27multi.surbl.org
27dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
25dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
25blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
17dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
15dnsbl-0.uceprotect.net
5countries.blackholes.us (result 127.5.6.6 = Nigeria)
4spamguard.leadmon.net (union of all results)
3spam.wytnij.to
3multi.uribl.com (result 127.0.0.2 = spam resource)
3multi.uribl.com (union of all results)
2dnsbl.sorbs.net (result 127.0.0.5 = open relay)
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
2dnsbl.ahbl.org (result 127.0.0.4 = spam source)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
1rdts.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1dob.sibl.support-intelligence.net
1blackholes.brainerd.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
69328(total number of IP addresses whose names were tested, including 485 at SDSC)
33972(union of all domain zones)
24821l1.apews.org
23764abuse.rfc-ignorant.org
17084rddn.dnsbl.net.au
13109whois.rfc-ignorant.org (union of all results)
11524dynamic.rhs.mailpolice.com
8489whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4620whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
1956webmail.rhs.mailpolice.com
783adv.rhs.mailpolice.com
284rhsbl.ahbl.org
169multi.surbl.org
131multi.uribl.com (union of all results)
130multi.uribl.com (result 127.0.0.2 = spam resource)
123bulk.rhs.mailpolice.com
64postmaster.rfc-ignorant.org
60bogusmx.rfc-ignorant.org
47dsn.rfc-ignorant.org (zone not intended for this use)
10rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
10rhsbl.sorbs.net (union of all results)
8dob.sibl.support-intelligence.net
7porn.rhs.mailpolice.com
5bl.deadbeef.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
52191(total number of domains tested, including 429 at SDSC)
13094(union of all domain zones)
5875whois.rfc-ignorant.org (union of all results)
5450whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2460abuse.rfc-ignorant.org
2302bogusmx.rfc-ignorant.org
1411postmaster.rfc-ignorant.org
1291multi.surbl.org
1173l1.apews.org
947multi.uribl.com (union of all results)
905multi.uribl.com (result 127.0.0.2 = spam resource)
725webmail.rhs.mailpolice.com
468dsn.rfc-ignorant.org
425whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
307adv.rhs.mailpolice.com
174porn.rhs.mailpolice.com
100bulk.rhs.mailpolice.com
86rhsbl.ahbl.org
38multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
35rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
35rhsbl.sorbs.net (union of all results)
18ex.dnsbl.org
13rddn.dnsbl.net.au (zone not intended for this use)
5dynamic.rhs.mailpolice.com
4multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2fraud.rhs.mailpolice.com
2dob.sibl.support-intelligence.net
1bl.deadbeef.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 12 December 2008.