Blacklists Compared

29 October 2011

[ 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, iadb2.isipp.com, swl.spamhaus.org, and wl.mailspike.net zones because they are not blacklists. Because they are too aggressive to be widely useful the spam.dnsbl.sorbs.net and l2.apews.org zones are also excluded from the union.

HitsDNS Zone
60567(total number of IP addresses tested, including 163 at SDSC)
57399(union of most IP zones)
48062l2.apews.org
47065zen.spamhaus.org (union of all results)
45380b.barracudacentral.org
45096zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
44844cbl.abuseat.org
40409hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
37682ip.v4bl.org
37562bl.mailspike.net (union of all results)
31313dnsbl-1.uceprotect.net
31169zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
30581spam.dnsbl.sorbs.net
30215dnsbl.sorbs.net (union of all results)
28434dnsbl-2.uceprotect.net
28367dnsbl-3.uceprotect.net
26294truncate.gbudb.net
25403bl.tiopan.com
22047hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
21455bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
21231bl.spameatingmonkey.net
21140dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
18766ubl.unsubscore.com
18033blackholes.five-ten-sg.com (union of all results)
17470bl.mailspike.net (result 127.0.0.11 = very bad reputation)
16432psbl.surriel.com
15603bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
10355dnsbl.sorbs.net (result 127.0.0.10 = dialup)
8219blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
8210blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
7135db.wpbl.info
6641bl.spamcop.net
6525dnsbl.sorbs.net (result 127.0.0.6 = spam source)
6129hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
5909zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
5775list.dnswl.org (not a blacklist!)
5146no-more-funn.moensted.dk (union of all results)
5021bl.score.senderscore.com
4702dnsbl.inps.de
4193wl.mailspike.net (union of all results) (not a blacklist!)
3574ix.dnsbl.manitu.net
3396ips.backscatterer.org
2883bl.mailspike.net (result 127.0.0.12 = bad reputation)
2682wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2624no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2499hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2326hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2211no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1985korea.services.net
1779hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1587blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1502wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1219spamsources.fabel.dk
1211bl.spamcannibal.org
1103mail-abuse.blacklist.jippg.org
607accredit.habeas.com (not a blacklist!)
580zen.spamhaus.org (union of SBL and SBLCSS results)
579query.bondedsender.org (not a blacklist!)
487zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
435dnsbl.njabl.org (union of all results)
337dnsbl.njabl.org (result 127.0.0.9 = open proxy)
330aspews.ext.sorbs.net
315dnsbl.ahbl.org (union of all results)
304tr.countries.nerd.dk
201dnsbl.ahbl.org (result 127.0.0.4 = spam source)
181iadb.isipp.com (not a blacklist!)
152no-more-funn.moensted.dk (result 127.0.0.9 = misc)
149no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
145hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
115iadb2.isipp.com (not a blacklist!)
93zen.spamhaus.org (result 127.0.0.3 = Spamhaus SBLCSS)
88dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
78dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
78dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
78dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
54l2.bbfh.ext.sorbs.net
50dnsbl.njabl.org (result 127.0.0.2 = open relay)
48dnsbl.njabl.org (result 127.0.0.4 = spam source)
46hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
39tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
39tor.dnsbl.sectoor.de (union of all results)
26dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
24swl.spamhaus.org (union of all results) (not a blacklist!)
22no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
19bl.deadbeef.com
17blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
11dnsbl-0.uceprotect.net
10multi.surbl.org
9swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
9wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
8swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
7swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
6spamguard.leadmon.net (union of all results)
5spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
3dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
3multi.uribl.com (union of all results)
2multi.uribl.com (result 127.0.0.2 = spam resource)
1zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1spamguard.leadmon.net (result 127.0.0.3 = spam source)
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
60567(total number of IP addresses whose names were tested, including 163 at SDSC)
30709hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
24594hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
21043(union of most domain zones)
16741abuse.rfc-ignorant.org
13792l1.apews.org
9221whois.rfc-ignorant.org (union of all results)
7964whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4080hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2780hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1258whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
377hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
261dbl.spamhaus.org (result 127.0.1.2 = spam source)
261dbl.spamhaus.org (union of all results)
260hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
203urired.spameatingmonkey.net
193hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
178hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
117hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
46rhsbl.ahbl.org
40postmaster.rfc-ignorant.org
31bogusmx.rfc-ignorant.org
28multi.surbl.org
19multi.uribl.com (result 127.0.0.2 = spam resource)
19multi.uribl.com (union of all results)
15fresh.spameatingmonkey.net
8dob.sibl.support-intelligence.net
7dsn.rfc-ignorant.org (zone not intended for this use)
6hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
1bl.deadbeef.com
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
31341(total number of domains tested, including 140 at SDSC)
27888hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6318(union of most domain zones)
4028hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2495whois.rfc-ignorant.org (union of all results)
2364whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2193hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2174hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1412abuse.rfc-ignorant.org
1129hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
899dbl.spamhaus.org (result 127.0.1.2 = spam source)
899dbl.spamhaus.org (union of all results)
816urired.spameatingmonkey.net
762postmaster.rfc-ignorant.org
652bogusmx.rfc-ignorant.org
646hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
606l1.apews.org
525multi.uribl.com (union of all results)
512multi.uribl.com (result 127.0.0.2 = spam resource)
426multi.surbl.org
359hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
274dsn.rfc-ignorant.org
151fresh.spameatingmonkey.net
131whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
65dob.sibl.support-intelligence.net
63hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
34rhsbl.ahbl.org
24hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
13hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
10multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
9ex.dnsbl.org
3multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
3hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 1 November 2011.