Blacklists Compared

17 May 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
189661(total number of IP addresses tested, including 473 at SDSC)
182589(union of most IP zones)
164204l2.apews.org
158810zen.spamhaus.org (union of all results)
141203t1.dnsbl.net.au
104307cbl.abuseat.org
104217zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
101763zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
97888dnsbl-1.uceprotect.net
97098dnsbl-3.uceprotect.net
94078dnsbl-2.uceprotect.net
90059hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
81453psbl.surriel.com
72668dnsbl.sorbs.net (union of all results)
66152no-more-funn.moensted.dk (union of all results)
64417blackholes.five-ten-sg.com (union of all results)
63204dnsbl.sorbs.net (result 127.0.0.10 = dialup)
58998blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
47913no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
44044ubl.unsubscore.com
38377bl.spamcop.net
36539ix.dnsbl.manitu.net
28353db.wpbl.info
27820zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
25136sbl.csma.biz
24992bl.csma.biz
16742no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
13795countries.blackholes.us (result 127.1.5.6 = China)
11723bl.spamcannibal.org
10614tr.countries.nerd.dk
10077unconfirmed.dsbl.org
9679mail-abuse.blacklist.jippg.org
9485list.dsbl.org
9028countries.blackholes.us (result 127.0.7.6 = Brazil)
8933dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
8838countries.blackholes.us (result 127.6.4.3 = Russia)
8814hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
8384dsbl.dnsbl.net.au
8268countries.blackholes.us (result 127.7.9.2 = Turkey)
6177ips.backscatterer.org
5751rmst.dnsbl.net.au
5618korea.services.net
5068dnsbl.njabl.org (union of all results)
4729countries.blackholes.us (result 127.4.1.0 = Korea)
4612dnsbl.njabl.org (result 127.0.0.9 = open proxy)
4435list.dnswl.org (not a blacklist!)
4303countries.blackholes.us (result 127.0.3.2 = Argentina)
4239blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
3524spamsources.fabel.dk
2958dnsbl.ahbl.org (union of all results)
2754dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
2257hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2216countries.blackholes.us (result 127.4.8.4 = Mexico)
2077countries.blackholes.us (result 127.7.6.4 = Thailand)
1350zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1250aspews.ext.sorbs.net
1190countries.blackholes.us (result 127.3.9.2 = Japan)
1172hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
1137blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1125no-more-funn.moensted.dk (result 127.0.0.9 = misc)
719countries.blackholes.us (result 127.1.5.8 = Taiwan)
402dnsbl.njabl.org (result 127.0.0.4 = spam source)
395zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
379probes.dnsbl.net.au
373countries.blackholes.us (result 127.4.5.8 = Malaysia)
350countries.blackholes.us (result 127.7.0.2 = Singapore)
328dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
317dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
316no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
308countries.blackholes.us (result 127.3.4.4 = Hong Kong)
277dnsbl.sorbs.net (result 127.0.0.6 = spam source)
253query.bondedsender.org (not a blacklist!)
235work.drbl.croco.net
221tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
221tor.dnsbl.sectoor.de (union of all results)
197no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
196bl.deadbeef.com
193accredit.habeas.com (not a blacklist!)
177iadb2.isipp.com (not a blacklist!)
169dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
164iadb.isipp.com (not a blacklist!)
112dnsbl.ahbl.org (result 127.0.0.4 = spam source)
62dnsbl.ahbl.org (result 127.0.0.7 = spam haven)
61multihop.dsbl.org
56multi.surbl.org
54dnsbl.njabl.org (result 127.0.0.2 = open relay)
43countries.blackholes.us (result 127.5.6.6 = Nigeria)
42relays.nether.net
38exemptions.ahbl.org (not a blacklist!)
23blackholes.five-ten-sg.com (result 127.0.0.7 = spam haven)
19blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
18rdts.dnsbl.net.au
17dnsbl.ahbl.org (result 127.0.0.15 = open relay)
9spam.wytnij.to
9dnsbl.ahbl.org (result 127.0.0.19 = open proxy test zone)
8spamguard.leadmon.net (union of all results)
7multi.uribl.com (union of all results)
6multi.uribl.com (result 127.0.0.2 = spam resource)
5ohps.dnsbl.net.au
3spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3spamguard.leadmon.net (result 127.0.0.8 = open proxy)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
2blackholes.brainerd.net
2dnsbl.ahbl.org (result 127.0.0.20 = blog/wiki/comment spam source)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1spamsites.dnsbl.net.au
1osps.dnsbl.net.au
1no-more-funn.moensted.dk (result 127.0.0.4 = unconfirmed opt-in)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1dob.sibl.support-intelligence.net
1dnsbl.ahbl.org (result 127.0.0.11 = no postmaster or abuse e-mail)
1dnsbl.ahbl.org (result 127.0.0.14 = denial-of-service attacker)


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

HitsDNS Zone
189661(total number of IP addresses whose names were tested, including 473 at SDSC)
112438(union of all domain zones)
94332l1.apews.org
79576abuse.rfc-ignorant.org
65105rddn.dnsbl.net.au
44302whois.rfc-ignorant.org (union of all results)
41660dynamic.rhs.mailpolice.com
30763whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
13539whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
7276webmail.rhs.mailpolice.com
632multi.surbl.org
585adv.rhs.mailpolice.com
576multi.uribl.com (union of all results)
575multi.uribl.com (result 127.0.0.2 = spam resource)
305bl.deadbeef.com
208bulk.rhs.mailpolice.com
119bogusmx.rfc-ignorant.org
86postmaster.rfc-ignorant.org
84rhsbl.ahbl.org
48dsn.rfc-ignorant.org (zone not intended for this use)
36dob.sibl.support-intelligence.net
31rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
31rhsbl.sorbs.net (union of all results)
6porn.rhs.mailpolice.com
1multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
1ex.dnsbl.org


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

HitsDNS Zone
157291(total number of domains tested, including 425 at SDSC)
38978(union of all domain zones)
22557whois.rfc-ignorant.org (union of all results)
21849whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
7453bogusmx.rfc-ignorant.org
5225abuse.rfc-ignorant.org
2271postmaster.rfc-ignorant.org
1985multi.surbl.org
1808l1.apews.org
1662multi.uribl.com (union of all results)
1595multi.uribl.com (result 127.0.0.2 = spam resource)
1271webmail.rhs.mailpolice.com
1093dsn.rfc-ignorant.org
708whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
582porn.rhs.mailpolice.com
249adv.rhs.mailpolice.com
213rhsbl.ahbl.org
210bulk.rhs.mailpolice.com
193blackhole.securitysage.com
117rddn.dnsbl.net.au (zone not intended for this use)
96dynamic.rhs.mailpolice.com
67rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
67rhsbl.sorbs.net (union of all results)
65multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
43dob.sibl.support-intelligence.net
17ex.dnsbl.org
4fraud.rhs.mailpolice.com
3bl.deadbeef.com
2multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1cart00ney.surriel.com


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 23 May 2008.