Blacklists Compared

23 August 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
181148(total number of IP addresses tested, including 465 at SDSC)
174028(union of most IP zones)
152945zen.spamhaus.org (union of all results)
126455t1.dnsbl.net.au
106322cbl.abuseat.org
106187zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
94737zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
89426dnsbl-3.uceprotect.net
85824dnsbl-2.uceprotect.net
85476psbl.surriel.com
77790dnsbl-1.uceprotect.net
77409dnsbl.sorbs.net (union of all results)
76274hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
55204no-more-funn.moensted.dk (union of all results)
54635dnsbl.sorbs.net (result 127.0.0.10 = dialup)
51702blackholes.five-ten-sg.com (union of all results)
46769blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
46539ubl.unsubscore.com
39814db.wpbl.info
39724no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
37231bl.spamcop.net
32424ix.dnsbl.manitu.net
24416zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
22635dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
14170l2.apews.org
14142no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
12210spam.dnsbl.sorbs.net
11031bl.spamcannibal.org
10025countries.blackholes.us (result 127.1.5.6 = China)
9859dnsbl.inps.de
9839hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
8846countries.blackholes.us (result 127.0.7.6 = Brazil)
8489tr.countries.nerd.dk
8305countries.blackholes.us (result 127.6.4.3 = Russia)
8264mail-abuse.blacklist.jippg.org
6536ips.backscatterer.org
6477korea.services.net
6284countries.blackholes.us (result 127.7.9.2 = Turkey)
5230countries.blackholes.us (result 127.4.1.0 = Korea)
4901spamsources.fabel.dk
4430countries.blackholes.us (result 127.7.6.4 = Thailand)
4336list.dnswl.org (not a blacklist!)
4026dnsbl.njabl.org (union of all results)
3810blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
3684countries.blackholes.us (result 127.0.3.2 = Argentina)
3607sbl.csma.biz
3305bl.csma.biz
3196dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2873hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2259dnsbl.ahbl.org (union of all results)
2172rmst.dnsbl.net.au
1915dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1683countries.blackholes.us (result 127.4.8.4 = Mexico)
1628countries.blackholes.us (result 127.3.9.2 = Japan)
1204aspews.ext.sorbs.net
1145countries.blackholes.us (result 127.1.5.8 = Taiwan)
1068blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
911no-more-funn.moensted.dk (result 127.0.0.9 = misc)
655dnsbl.njabl.org (result 127.0.0.4 = spam source)
600zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
486countries.blackholes.us (result 127.7.0.2 = Singapore)
485zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
393countries.blackholes.us (result 127.3.4.4 = Hong Kong)
286query.bondedsender.org (not a blacklist!)
265countries.blackholes.us (result 127.4.5.8 = Malaysia)
261hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
260no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
259dnsbl.ahbl.org (result 127.0.0.4 = spam source)
251dnsbl.sorbs.net (result 127.0.0.6 = spam source)
247no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
220probes.dnsbl.net.au
206accredit.habeas.com (not a blacklist!)
185iadb2.isipp.com (not a blacklist!)
175dnsbl.njabl.org (result 127.0.0.2 = open relay)
155bl.deadbeef.com
139tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
139tor.dnsbl.sectoor.de (union of all results)
136iadb.isipp.com (not a blacklist!)
86multi.surbl.org
86dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
75dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
34blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
33dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
32exemptions.ahbl.org (not a blacklist!)
27dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
23countries.blackholes.us (result 127.5.6.6 = Nigeria)
19blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
18dnsbl.ahbl.org (result 127.0.0.15 = open relay)
14spamguard.leadmon.net (union of all results)
13rdts.dnsbl.net.au
11dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
11spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
9spam.wytnij.to
6dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
5dnsbl.sorbs.net (result 127.0.0.5 = open relay)
5blackholes.brainerd.net
4multi.uribl.com (result 127.0.0.2 = spam resource)
4multi.uribl.com (union of all results)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1ohps.dnsbl.net.au
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
1dob.sibl.support-intelligence.net
1dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)
1dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)


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

HitsDNS Zone
181148(total number of IP addresses whose names were tested, including 465 at SDSC)
97724(union of all domain zones)
72456abuse.rfc-ignorant.org
56504rddn.dnsbl.net.au
38799dynamic.rhs.mailpolice.com
37997whois.rfc-ignorant.org (union of all results)
25654whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
12343whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
7662webmail.rhs.mailpolice.com
6939l1.apews.org
600adv.rhs.mailpolice.com
475bl.deadbeef.com
398multi.surbl.org
270multi.uribl.com (union of all results)
269multi.uribl.com (result 127.0.0.2 = spam resource)
193bulk.rhs.mailpolice.com
92rhsbl.ahbl.org
82postmaster.rfc-ignorant.org
70bogusmx.rfc-ignorant.org
63rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
63rhsbl.sorbs.net (union of all results)
61dsn.rfc-ignorant.org (zone not intended for this use)
27dob.sibl.support-intelligence.net
7porn.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
140299(total number of domains tested, including 415 at SDSC)
28788(union of all domain zones)
15084whois.rfc-ignorant.org (union of all results)
14421whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
5770bogusmx.rfc-ignorant.org
4679abuse.rfc-ignorant.org
2591postmaster.rfc-ignorant.org
1812multi.surbl.org
1228webmail.rhs.mailpolice.com
1090multi.uribl.com (union of all results)
1038multi.uribl.com (result 127.0.0.2 = spam resource)
926dsn.rfc-ignorant.org
663whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
555porn.rhs.mailpolice.com
293adv.rhs.mailpolice.com
188rhsbl.ahbl.org
161bulk.rhs.mailpolice.com
139rddn.dnsbl.net.au (zone not intended for this use)
124dynamic.rhs.mailpolice.com
51multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
46rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
46rhsbl.sorbs.net (union of all results)
15ex.dnsbl.org
11dob.sibl.support-intelligence.net
9l1.apews.org
3bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1fraud.rhs.mailpolice.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 29 August 2008.