Hello,
there has been talk on the list placing 127.** or some other private address as tarpit as MX record with least precedence.
What about a DNS configuration with an invalid private MX as first one?
I just test a sender validation by grabbing all MX's records and check if the first one is an external address; doing so I found this domain:
; <<>> DiG 9.2.4rc5 <<>> -t mx mox.de. ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29441 ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 2, ADDITIONAL: 4
;; QUESTION SECTION: ;mox.de. IN MX
;; ANSWER SECTION: mox.de. 252 IN MX 30 mail.portunity.de. mox.de. 252 IN MX 10 192.168.100.251. mox.de. 252 IN MX 20 mail.mox.de.
These are not spammers, BTW.
I would consider such setup invalid and my code had rejected the mail, if it were enable. -- I mean, why does they try to deliver mail to one of my hosts, private addresses are "my hosts", aren't they?
I ignore the fact here intentionally, that they do point to a numerical address rather than a symbolic host.
What do you think?
Bye,
-- Steffen Kaiser _______________________________________________ Visit http://www.mimedefang.org and http://www.canit.ca MIMEDefang mailing list [EMAIL PROTECTED] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
