Blacklists Compared

20 August 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
43704(total number of IP addresses tested, including 197 at SDSC)
40336(union of most IP zones)
32358b.barracudacentral.org
32319l2.apews.org
30029zen.spamhaus.org (union of all results)
28495zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
28495cbl.abuseat.org
26948hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
24865bl.mailspike.net (union of all results)
21830dnsbl-1.uceprotect.net
21022hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
19424zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
19205dnsbl-3.uceprotect.net
18951dnsbl-2.uceprotect.net
16876spam.dnsbl.sorbs.net
16843ddnsbl.internetdefensesystems.com
16438bl.tiopan.com
15456blackholes.five-ten-sg.com (union of all results)
15175truncate.gbudb.net
14813bl.spameatingmonkey.net
11755bl.mailspike.net (result 127.0.0.11 = very bad reputation)
11734psbl.surriel.com
11553ubl.unsubscore.com
11072dnsbl.sorbs.net (union of all results)
10949bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
9964bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
8189blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
7310dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
5682blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
5499list.dnswl.org (not a blacklist!)
5314db.wpbl.info
4796bl.spamcop.net
4190zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
4148dnsbl.sorbs.net (result 127.0.0.10 = dialup)
4085no-more-funn.moensted.dk (union of all results)
4033bl.score.senderscore.com
3836wl.mailspike.net (union of all results) (not a blacklist!)
3131ix.dnsbl.manitu.net
2764dnsbl.inps.de
2736bl.mailspike.net (result 127.0.0.12 = bad reputation)
2620hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2501hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2465wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
2222no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2201hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
1710no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1645ips.backscatterer.org
1595hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1566blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1362wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1316korea.services.net
1119bl.spamcannibal.org
992spamsources.fabel.dk
795mail-abuse.blacklist.jippg.org
593accredit.habeas.com (not a blacklist!)
582dnsbl.sorbs.net (result 127.0.0.6 = spam source)
543query.bondedsender.org (not a blacklist!)
372dnsbl.njabl.org (union of all results)
300aspews.ext.sorbs.net
282zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
282zen.spamhaus.org (union of SBL and SBLCSS results)
262dnsbl.njabl.org (result 127.0.0.9 = open proxy)
248tr.countries.nerd.dk
217iadb2.isipp.com (not a blacklist!)
196iadb.isipp.com (not a blacklist!)
194dnsbl.ahbl.org (union of all results)
160hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
103dnsbl.ahbl.org (result 127.0.0.4 = spam source)
81l2.bbfh.ext.sorbs.net
74dnsbl.njabl.org (result 127.0.0.2 = open relay)
72no-more-funn.moensted.dk (result 127.0.0.9 = misc)
67dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
59no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
56dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
56dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
56dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
48no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
36dnsbl.njabl.org (result 127.0.0.4 = spam source)
35tor.dnsbl.sectoor.de (union of all results)
34tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
32l1.bbfh.ext.sorbs.net
24dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
19blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
19swl.spamhaus.org (union of all results) (not a blacklist!)
14bl.deadbeef.com
10swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
9multi.surbl.org
9wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
8hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
7swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
5spamguard.leadmon.net (union of all results)
3multi.uribl.com (result 127.0.0.2 = spam resource)
3multi.uribl.com (union of all results)
2dnsbl-0.uceprotect.net
2swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
2dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
2spamguard.leadmon.net (result 127.0.0.7 = spam source netblock)
2spamguard.leadmon.net (result 127.0.0.3 = spam source)
1tor.dnsbl.sectoor.de (result 127.0.0.1 = Tor server)
1spamguard.leadmon.net (result 127.0.0.9 = abused DNS server)
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
43704(total number of IP addresses whose names were tested, including 197 at SDSC)
24380hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
19681hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16243(union of most domain zones)
13111abuse.rfc-ignorant.org
10215l1.apews.org
6457whois.rfc-ignorant.org (union of all results)
5494whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3571hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2800hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
966whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
429hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
282hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
282hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
215dbl.spamhaus.org (result 127.0.1.2 = spam source)
215dbl.spamhaus.org (union of all results)
156hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
148postmaster.rfc-ignorant.org
144urired.spameatingmonkey.net
75hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
31bogusmx.rfc-ignorant.org
27fresh.spameatingmonkey.net
26multi.surbl.org
21rhsbl.ahbl.org
17dob.sibl.support-intelligence.net
16hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
11multi.uribl.com (result 127.0.0.2 = spam resource)
11multi.uribl.com (union of all results)
7dsn.rfc-ignorant.org (zone not intended for this use)
4bl.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
22107(total number of domains tested, including 164 at SDSC)
18326hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
6010(union of most domain zones)
4025hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
3065whois.rfc-ignorant.org (union of all results)
2920whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
2070hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1911hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1564abuse.rfc-ignorant.org
860l1.apews.org
718postmaster.rfc-ignorant.org
604hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
555hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
506dbl.spamhaus.org (result 127.0.1.2 = spam source)
506dbl.spamhaus.org (union of all results)
504bogusmx.rfc-ignorant.org
408multi.uribl.com (union of all results)
396multi.uribl.com (result 127.0.0.2 = spam resource)
380urired.spameatingmonkey.net
373multi.surbl.org
328hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
259dsn.rfc-ignorant.org
145whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
128fresh.spameatingmonkey.net
66dob.sibl.support-intelligence.net
27hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
18rhsbl.ahbl.org
14hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
11multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
10ex.dnsbl.org
9hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
2bl.deadbeef.com
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1hostkarma.junkemailfilter.com (result 127.0.1.3 = MTA somtimes sends QUIT)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 22 August 2011.