"J.J.Gallardo" escribió:
> Hi list:
>
> I have this problem: one server running sendmail receives mail to a user. The
>account isn't
> local so sendmail try to inject to the destination MX host. The destination says
>"user
> unknown".
Sorry about this mail. Today I've readed RFC1123 and I know more about MTA, so i offer
to you
the most interesting:
5.2.9 Command Syntax: RFC-821 Section 4.1.2
The syntax shown in RFC-821 for the MAIL FROM: command omits the case of an empty
path: "MAIL
FROM: <>" (see RFC-821 Page 15). An empty reverse path MUST be supported.
5.3.3 Reliable Mail Receipt
.......
If there is a delivery failure after acceptance of a message, the receiver-SMTP MUST
formulate
and mail a notification message. This notification MUST be sent using a null ("<>")
reverse
path in the envelope; see Section 3.6 of RFC-821. The recipient of this notification
SHOULD be
the address from the envelope return path (or the Return-Path: line). However, if
this address
is null ("<>"), the receiver-SMTP MUST NOT send a notification. If the address is an
explicit
source route, it SHOULD be stripped down to its final hop.
All days are good for learn something.
