Blacklists Compared

5 January 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
205170(total number of IP addresses tested, including 600 at SDSC)
194556(union of most IP zones)
170588l2.apews.org
170044zen.spamhaus.org (union of all results)
162102t1.dnsbl.net.au
132805sbl-xbl.spamhaus.org (union of all results)
132606pbl.spamhaus.org (union of all results)
132246xbl.spamhaus.org (union of all results)
132129cbl.abuseat.org
132124xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
132122sbl-xbl.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
132006zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
107894dnsbl.sorbs.net (union of all results)
102189psbl.surriel.com
101889dnsbl.tqmcube.com (union of all results)
100976dnsbl-3.uceprotect.net
99768dnsbl-1.uceprotect.net
95366dnsbl-2.uceprotect.net
93873pbl.spamhaus.org (result 127.0.0.11 = Spamhaus entry)
93774zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
82734no-more-funn.moensted.dk (union of all results)
79729dnsbl.sorbs.net (result 127.0.0.10 = dialup)
72731blackholes.five-ten-sg.com (union of all results)
70903no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
68612dnsbl.tqmcube.com (result 127.0.0.2 = dialup)
67459blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
64110hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
57905ubl.unsubscore.com
38733zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
38733pbl.spamhaus.org (result 127.0.0.10 = ISP contributed)
34941bl.spamcop.net
33507ix.dnsbl.manitu.net
32865dnsbl.tqmcube.com (result 127.0.0.3 = spam source)
29277dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
27602db.wpbl.info
25190sbl.csma.biz
24262bl.csma.biz
14509tr.countries.nerd.dk
13006unconfirmed.dsbl.org
12888countries.blackholes.us (result 127.7.9.2 = Turkey)
12875list.dsbl.org
12844dsbl.dnsbl.net.au
12497mail-abuse.blacklist.jippg.org
11474bl.spamcannibal.org
10256no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
8627ips.backscatterer.org
8517countries.blackholes.us (result 127.0.7.6 = Brazil)
6147korea.services.net
5943dnsbl.tqmcube.com (result 127.0.0.4 = South Korea)
5669countries.blackholes.us (result 127.4.1.0 = Korea)
5356rmst.dnsbl.net.au
5259dnsbl.tqmcube.com (result 127.0.0.5 = China)
5198countries.blackholes.us (result 127.1.5.6 = China)
4385list.dnswl.org (not a blacklist!)
4339blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
4163countries.blackholes.us (result 127.6.4.3 = Russia)
4057dnsbl.njabl.org (union of all results)
3768dnsbl.njabl.org (result 127.0.0.9 = open proxy)
2866countries.blackholes.us (result 127.0.3.2 = Argentina)
2804countries.blackholes.us (result 127.3.9.2 = Japan)
2404dnsbl.ahbl.org (union of all results)
2244dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
1984hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1948spamsources.fabel.dk
1768countries.blackholes.us (result 127.7.6.4 = Thailand)
1670hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
1396countries.blackholes.us (result 127.4.8.4 = Mexico)
1193countries.blackholes.us (result 127.4.5.8 = Malaysia)
1124no-more-funn.moensted.dk (result 127.0.0.9 = misc)
890probes.dnsbl.net.au
871xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
871sbl-xbl.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
870blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
868zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
803zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
803sbl-xbl.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
803sbl.spamhaus.org
742countries.blackholes.us (result 127.1.5.8 = Taiwan)
476countries.blackholes.us (result 127.3.4.4 = Hong Kong)
377countries.blackholes.us (result 127.7.0.2 = Singapore)
359no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
307aspews.ext.sorbs.net
273blackholes.uceb.org (union of all results)
264dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
250dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
227blackholes.uceb.org (result 127.0.0.6 = spam haven)
176no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
175bl.deadbeef.com
170work.drbl.croco.net
167dnsbl.njabl.org (result 127.0.0.4 = spam source)
158accredit.habeas.com (not a blacklist!)
138query.bondedsender.org (not a blacklist!)
122dnsbl.njabl.org (result 127.0.0.2 = open relay)
111dnsbl.ahbl.org (result 127.0.0.4 = spam source)
108multihop.dsbl.org
105blackholes.uceb.org (result 127.0.0.3 = spam source)
104iadb2.isipp.com (not a blacklist!)
97iadb.isipp.com (not a blacklist!)
84hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
67dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
58multi.surbl.org
56exemptions.ahbl.org (not a blacklist!)
52multi.uribl.com (result 127.0.0.2 = spam resource)
52relays.nether.net
52multi.uribl.com (union of all results)
39blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
29countries.blackholes.us (result 127.5.6.6 = Nigeria)
26blackholes.uceb.org (result 127.0.0.2 = open relay)
24dnsbl.sorbs.net (result 127.0.0.6 = spam source)
23blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
23dnsbl.ahbl.org (result 127.0.0.15 = open relay)
22rdts.dnsbl.net.au
20spam.wytnij.to
19dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
19spamguard.leadmon.net (union of all results)
9blackholes.uceb.org (result 127.0.0.5 = dialup)
9spamguard.leadmon.net (result 127.0.0.8 = open proxy)
8blackholes.brainerd.net
6spamguard.leadmon.net (result 127.0.0.3 = spam source)
4ohps.dnsbl.net.au
4spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
2spamsites.dnsbl.net.au
2osrs.dnsbl.net.au
2no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
2dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1osps.dnsbl.net.au
1blackholes.five-ten-sg.com (result 127.0.0.10 = virus notices)
1dob.sibl.support-intelligence.net
1dnsbl.ahbl.org (result 127.0.0.11 = no postmaster or abuse e-mail)
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
205170(total number of IP addresses whose names were tested, including 600 at SDSC)
134112(union of all domain zones)
114339l1.apews.org
88013rddn.dnsbl.net.au
78793abuse.rfc-ignorant.org
51984dynamic.rhs.mailpolice.com
50116whois.rfc-ignorant.org (union of all results)
32464whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
17653whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
9683webmail.rhs.mailpolice.com
741multi.surbl.org
708multi.uribl.com (union of all results)
706multi.uribl.com (result 127.0.0.2 = spam resource)
461adv.rhs.mailpolice.com
139bl.deadbeef.com
100dob.sibl.support-intelligence.net
82postmaster.rfc-ignorant.org
77rhsbl.ahbl.org
65bogusmx.rfc-ignorant.org
58dsn.rfc-ignorant.org (zone not intended for this use)
58bulk.rhs.mailpolice.com
36rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
36rhsbl.sorbs.net (union of all results)
17porn.rhs.mailpolice.com
2multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
1blackhole.securitysage.com


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

HitsDNS Zone
175457(total number of domains tested, including 651 at SDSC)
41238(union of all domain zones)
24921whois.rfc-ignorant.org (union of all results)
23897whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6830bogusmx.rfc-ignorant.org
4830abuse.rfc-ignorant.org
2570multi.surbl.org
2038multi.uribl.com (union of all results)
1995multi.uribl.com (result 127.0.0.2 = spam resource)
1797l1.apews.org
1560postmaster.rfc-ignorant.org
1434webmail.rhs.mailpolice.com
1024whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
828porn.rhs.mailpolice.com
794dsn.rfc-ignorant.org
466rhsbl.ahbl.org
395bulk.rhs.mailpolice.com
198blackhole.securitysage.com
192adv.rhs.mailpolice.com
180rddn.dnsbl.net.au (zone not intended for this use)
153dynamic.rhs.mailpolice.com
76rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
76rhsbl.sorbs.net (union of all results)
46dob.sibl.support-intelligence.net
41multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
3fraud.rhs.mailpolice.com
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2bl.deadbeef.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 10 January 2008.