On Mon, May 12, 2014 at 04:43:22PM +0200, Erik Logtenberg wrote:
> Okay, so the thing with DSN's is this: if my email client requests a DSN
> on success when sending a mail, my Postfix server will honour that
> request. Postfix does this in one of two possible ways:
The recommended setting is to disable DSN at the edge of your
network, causing remote servers to send any requested DSNs to their
own users, and likewise for your servers to return the final DSN
on successful delivery to a remote server, without delegating DSN
notification to that server.
smtpd_discard_ehlo_keywords = silent-discard, DSN
smtp_discard_ehlo_keywords = silent-discard, DSN
> However a workaround could be for my mail server to simply always create
> a DSN if a client requests it, regardless of the capabilities of a
> remote mail server.
This is the recommended approach, but there is not a duplicate DSN,
because in this mode Postfix will not request a DSN from the remote
server.
--
Viktor.
