Blacklists Compared

31 October 2009

[ 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 (all results but 127.0.0.2, 127.0.0.3, and 127.0.0.4), 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
174275(total number of IP addresses tested, including 185 at SDSC)
170032(union of most IP zones)
146385b.barracudacentral.org
143859zen.spamhaus.org (union of all results)
140777l2.apews.org
109098cbl.abuseat.org
109013zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
103687dnsbl-3.uceprotect.net
102794dnsbl-2.uceprotect.net
100038hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
99126dnsbl-1.uceprotect.net
97574dnsbl.sorbs.net (union of all results)
93106zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
88061psbl.surriel.com
74602ubl.unsubscore.com
70755dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
56926bl.spameatingmonkey.net
53128hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
39154no-more-funn.moensted.dk (union of all results)
38100dnsbl.sorbs.net (result 127.0.0.10 = dialup)
38060blackholes.five-ten-sg.com (union of all results)
35146blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
33383db.wpbl.info
31791bl.spamcop.net
31565bl.score.senderscore.com
26337no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
22190zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
18574spam.dnsbl.sorbs.net
17999ips.backscatterer.org
17325ix.dnsbl.manitu.net
11714mail-abuse.blacklist.jippg.org
11204dnsbl.inps.de
10335no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
10277bl.spamcannibal.org
9822hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
8776korea.services.net
4600spamsources.fabel.dk
4473list.dnswl.org (not a blacklist!)
4338hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
3261hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2460dnsbl.njabl.org (union of all results)
2139hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2083blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
1874dnsbl.njabl.org (result 127.0.0.9 = open proxy)
1677tr.countries.nerd.dk
1363no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
1027no-more-funn.moensted.dk (result 127.0.0.9 = misc)
861zen.spamhaus.org (union of SBL and SBLCSS results)
811blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
656aspews.ext.sorbs.net
523accredit.habeas.com (not a blacklist!)
517l2.bbfh.ext.sorbs.net
495zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
470dnsbl.sorbs.net (result 127.0.0.6 = spam source)
432query.bondedsender.org (not a blacklist!)
384dnsbl.njabl.org (result 127.0.0.4 = spam source)
366zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
217l1.bbfh.ext.sorbs.net
202dnsbl.njabl.org (result 127.0.0.2 = open relay)
198no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
188dnsbl.ahbl.org (union of all results)
148iadb2.isipp.com (not a blacklist!)
146dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
134hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
111tor.dnsbl.sectoor.de (union of all results)
110tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
109iadb.isipp.com (not a blacklist!)
64dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
60bl.deadbeef.com
42dnsbl.ahbl.org (result 127.0.0.4 = spam source)
37dnsbl-0.uceprotect.net
30dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
29multi.uribl.com (result 127.0.0.2 = spam resource)
29multi.uribl.com (union of all results)
28dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
17blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
15zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
13hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
8multi.surbl.org
8blackholes.brainerd.net
6spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
6spamguard.leadmon.net (union of all results)
3dnsbl.sorbs.net (result 127.0.0.5 = open relay)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1blackholes.five-ten-sg.com (result 127.0.0.8 = open web form)
1blackholes.five-ten-sg.com (result 127.0.0.11 = TCPA violator)
1blackholes.five-ten-sg.com (result 127.0.0.6 = open relay)


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on the domain names of connecting IP addresses. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
174275(total number of IP addresses whose names were tested, including 185 at SDSC)
109911hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
93937hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
84874(union of most domain zones)
73402l1.apews.org
67735abuse.rfc-ignorant.org
32469dynamic.rhs.mailpolice.com
27936whois.rfc-ignorant.org (union of all results)
20425whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
12570hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
7512whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
4182webmail.rhs.mailpolice.com
3437hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
878hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
846adv.rhs.mailpolice.com
766hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
531urired.spameatingmonkey.net
408hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
300hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
271bl.deadbeef.com
238hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
127rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
127rhsbl.sorbs.net (union of all results)
84postmaster.rfc-ignorant.org
63multi.surbl.org
58multi.uribl.com (union of all results)
57multi.uribl.com (result 127.0.0.2 = spam resource)
51bogusmx.rfc-ignorant.org
48dsn.rfc-ignorant.org (zone not intended for this use)
40rhsbl.ahbl.org
29bulk.rhs.mailpolice.com
23hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
22porn.rhs.mailpolice.com
8fresh.spameatingmonkey.net
7dob.sibl.support-intelligence.net
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)


Survey results for all known public domain-name-based DNS blacklists. Lookups were done on SMTP sender domains. The "union of most domain zones" line includes data from the hostkarma.junkemailfilter.com zone only when the results are 127.0.0.2, 127.0.0.3, or 127.0.0.4 because other results are not blacklists.

HitsDNS Zone
65359(total number of domains tested, including 163 at SDSC)
61318hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
17124(union of most domain zones)
8885hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
7176whois.rfc-ignorant.org (union of all results)
6706whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
6036hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
4569abuse.rfc-ignorant.org
2974hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2818urired.spameatingmonkey.net
2619l1.apews.org
1569hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
1514postmaster.rfc-ignorant.org
1366bogusmx.rfc-ignorant.org
1118multi.surbl.org
999multi.uribl.com (union of all results)
982multi.uribl.com (result 127.0.0.2 = spam resource)
930webmail.rhs.mailpolice.com
605hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
560hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
525dsn.rfc-ignorant.org
470whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
379dynamic.rhs.mailpolice.com
320adv.rhs.mailpolice.com
210porn.rhs.mailpolice.com
78bulk.rhs.mailpolice.com
67hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
42hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
34hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
26rhsbl.sorbs.net (result 127.0.0.11 = domain uses bad address space)
26rhsbl.ahbl.org
26rhsbl.sorbs.net (union of all results)
14multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
13ex.dnsbl.org
11fresh.spameatingmonkey.net
10dob.sibl.support-intelligence.net
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
2bl.deadbeef.com
1fraud.rhs.mailpolice.com
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)


This document was last updated by Jeff Makey <jeff@sdsc.edu> on 5 November 2009.