Blacklists Compared

9 July 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
45008(total number of IP addresses tested, including 166 at SDSC)
41861(union of most IP zones)
33752l2.apews.org
33664b.barracudacentral.org
31911zen.spamhaus.org (union of all results)
30145cbl.abuseat.org
30141zen.spamhaus.org (result 127.0.0.4 = Composite Blocking List)
27476hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
26492bl.mailspike.net (union of all results)
23804dnsbl-1.uceprotect.net
21261spam.dnsbl.sorbs.net
20982bl.tiopan.com
20617zen.spamhaus.org (result 127.0.0.11 = Spamhaus PBL, Spamhaus entry)
19286dnsbl-2.uceprotect.net
19112dnsbl-3.uceprotect.net
16797ddnsbl.internetdefensesystems.com
16280hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
15586blackholes.five-ten-sg.com (union of all results)
15193bl.spameatingmonkey.net
14694truncate.gbudb.net
13574dnsbl.sorbs.net (union of all results)
13488bl.mailspike.net (result 127.0.0.2 = distributed spam wave participant)
13219psbl.surriel.com
12420bl.mailspike.net (result 127.0.0.11 = very bad reputation)
12174ubl.unsubscore.com
10778bl.mailspike.net (result 127.0.0.10 = worst possible reputation)
8636blackholes.five-ten-sg.com (result 127.0.0.2 = spam source)
7601dnsbl.sorbs.net (result 127.0.0.7 = hacked/vulnerable)
6491db.wpbl.info
5459list.dnswl.org (not a blacklist!)
5447blackholes.five-ten-sg.com (result 127.0.0.9 = misc)
5173bl.spamcop.net
4551no-more-funn.moensted.dk (union of all results)
4451bl.score.senderscore.com
4424hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
4126dnsbl.sorbs.net (result 127.0.0.10 = dialup)
3933wl.mailspike.net (union of all results) (not a blacklist!)
3850zen.spamhaus.org (result 127.0.0.10 = Spamhaus PBL, ISP contributed)
3678ix.dnsbl.manitu.net
3397dnsbl.sorbs.net (result 127.0.0.6 = spam source)
2762hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
2578dnsbl.inps.de
2572no-more-funn.moensted.dk (result 127.0.0.2 = spam source)
2557bl.mailspike.net (result 127.0.0.12 = bad reputation)
2535hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
2373ips.backscatterer.org
2310wl.mailspike.net (result 127.0.0.17 = possible legitimate sender) (not a blacklist!)
1859no-more-funn.moensted.dk (result 127.0.0.3 = dialup)
1613wl.mailspike.net (result 127.0.0.18 = good reputation) (not a blacklist!)
1478blackholes.five-ten-sg.com (result 127.0.0.4 = unconfirmed opt-in)
1379hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
1366korea.services.net
1142bl.spamcannibal.org
1094mail-abuse.blacklist.jippg.org
1074spamsources.fabel.dk
561accredit.habeas.com (not a blacklist!)
523query.bondedsender.org (not a blacklist!)
379zen.spamhaus.org (result 127.0.0.2 = Spamhaus SBL)
379zen.spamhaus.org (union of SBL and SBLCSS results)
357dnsbl.njabl.org (union of all results)
296aspews.ext.sorbs.net
259dnsbl.ahbl.org (union of all results)
257dnsbl.njabl.org (result 127.0.0.9 = open proxy)
234tr.countries.nerd.dk
227iadb2.isipp.com (not a blacklist!)
219l2.bbfh.ext.sorbs.net
210iadb.isipp.com (not a blacklist!)
154dnsbl.ahbl.org (result 127.0.0.4 = spam source)
85dnsbl.ahbl.org (result 127.0.0.3 = open proxy)
79l1.bbfh.ext.sorbs.net
61no-more-funn.moensted.dk (result 127.0.0.9 = misc)
60no-more-funn.moensted.dk (result 127.0.0.10 = open proxy)
57dnsbl.njabl.org (result 127.0.0.2 = open relay)
55hostkarma.junkemailfilter.com (result 127.0.0.4 = spam source aspirant)
47dnsbl.sorbs.net (result 127.0.0.3 = open socks proxy)
47dnsbl.sorbs.net (result 127.0.0.4 = open proxy)
47dnsbl.sorbs.net (result 127.0.0.2 = open http proxy)
43dnsbl.njabl.org (result 127.0.0.4 = spam source)
29tor.dnsbl.sectoor.de (result 127.0.0.2 = /24 contains a Tor server)
29tor.dnsbl.sectoor.de (union of all results)
25no-more-funn.moensted.dk (result 127.0.0.7 = spam haven)
25blackholes.five-ten-sg.com (result 127.0.0.12 = spam-friendly freemail provider)
20dnsbl.ahbl.org (result 127.0.0.10 = shoot on sight spammer)
20swl.spamhaus.org (union of all results) (not a blacklist!)
11bl.deadbeef.com
10wl.mailspike.net (result 127.0.0.19 = very good reputation) (not a blacklist!)
8swl.spamhaus.org (result 127.0.2.3 = sends transactions) (not a blacklist!)
7swl.spamhaus.org (result 127.0.2.103 = sends transactions - temporary listing) (not a blacklist!)
7multi.surbl.org
5swl.spamhaus.org (result 127.0.2.2 = sends individual mail) (not a blacklist!)
2dnsbl-0.uceprotect.net
2hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
1zen.spamhaus.org (result 127.0.0.5 = time-expired NJABL open proxy)
1multi.uribl.com (result 127.0.0.2 = spam resource)
1dnsbl.sorbs.net (result 127.0.0.9 = zombie network)
1multi.uribl.com (union of all results)
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
45008(total number of IP addresses whose names were tested, including 166 at SDSC)
25250hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
20737hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
16957(union of most domain zones)
13768abuse.rfc-ignorant.org
11325l1.apews.org
6546whois.rfc-ignorant.org (union of all results)
5527whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
3273hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2769hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1019whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
422hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
257hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
252hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
190dbl.spamhaus.org (result 127.0.1.2 = spam source)
190dbl.spamhaus.org (union of all results)
160hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
134urired.spameatingmonkey.net
75hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
46postmaster.rfc-ignorant.org
34bogusmx.rfc-ignorant.org
29multi.surbl.org
25dob.sibl.support-intelligence.net
21fresh.spameatingmonkey.net
19hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
19rhsbl.ahbl.org
16multi.uribl.com (result 127.0.0.2 = spam resource)
16multi.uribl.com (union of all results)
10dsn.rfc-ignorant.org (zone not intended for this use)
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
25469(total number of domains tested, including 140 at SDSC)
22331hostkarma.junkemailfilter.com (result 127.0.2.3 = domain first seen more than 7 days ago)
8146(union of most domain zones)
5123whois.rfc-ignorant.org (union of all results)
4976whois.rfc-ignorant.org (result 127.0.0.7 = no whois data at all)
4277hostkarma.junkemailfilter.com (result 127.0.1.1 = MTA sends QUIT)
2443hostkarma.junkemailfilter.com (result 127.0.0.5 = do not blacklist)
2300hostkarma.junkemailfilter.com (result 127.0.0.1 = whitelisted)
1616abuse.rfc-ignorant.org
906postmaster.rfc-ignorant.org
701hostkarma.junkemailfilter.com (result 127.0.2.2 = domain first seen in last 7 days)
664l1.apews.org
616bogusmx.rfc-ignorant.org
495hostkarma.junkemailfilter.com (result 127.0.0.2 = spam source)
427urired.spameatingmonkey.net
368hostkarma.junkemailfilter.com (result 127.0.0.3 = mix of spam and nonspam)
325dbl.spamhaus.org (union of all results)
324dbl.spamhaus.org (result 127.0.1.2 = spam source)
321multi.surbl.org
316dsn.rfc-ignorant.org
244multi.uribl.com (union of all results)
237multi.uribl.com (result 127.0.0.2 = spam resource)
147whois.rfc-ignorant.org (result 127.0.0.5 = bad whois data)
56dob.sibl.support-intelligence.net
48fresh.spameatingmonkey.net
44hostkarma.junkemailfilter.com (result 127.0.2.1 = domain first seen today)
16rhsbl.ahbl.org
14hostkarma.junkemailfilter.com (result 127.0.1.2 = MTA does not send QUIT)
13hostkarma.junkemailfilter.com (result 127.0.1.4 = no verify host)
9ex.dnsbl.org
6multi.uribl.com (result 127.0.0.4 = opt-out spam resource)
1multi.uribl.com (result 127.0.0.8 = new domain or concealed contact)
1dbl.spamhaus.org (result 127.0.1.3 = domain redirects to spammer)
This document was last updated by Jeff Makey <jeff@sdsc.edu> on 11 July 2011.