> Mar 16 22:10:32 rackspace postfix/smtp[28417]: 8B00131673: > to=<[EMAIL PROTECTED]>, relay=mx1.freebsd.org[216.136.204.125], > delay=11, status=deferred (host mx1.freebsd.org[216.136.204.125] said: > 450 Client host rejected: cannot find your hostname, [65.61.155.146] > (in reply to RCPT TO command))
"cannot find your hostname" is a postfix msg specific to failure of the ip sending as [EMAIL PROTECTED] to have matching A + PTR records.
the FreeBSD MX must have lookup table where, assuming Paul was sending as [EMAIL PROTECTED] when he was rejected, that contains a list "frequently forged domains and/or domains known to have matching A + PTR records":
mqtweb.com reject_unknown_client
For such domains, Postfix takes the ip of the sending MTA, queries for its PTR hostname, and then queries for the A record of the hostname, which must have the same ip:
C.D.B.A.in-addr.arpa. PTR some.host.name.
some.host.name. A A.B.C.D
Since 65.61.155.146 has no PTR hostname, the PTR + A match fails, and msg rejected.
I believe your mail is being rejected by the freebsd.org server due to '65.61.155.146' not having a reverse pointer.
that's sufficient to get rejected (no PTR will never be able to match an A record), but having a PTR is not sufficient to get accepted
btw, the actual domain of some.host.name can be anything. i.e., it does not need to be "label.mqtweb.com"
Len
To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-questions" in the body of the message
