Andreas Schulze:
>
> Hello,
>
> DSN for successfully deliveries are not enabled by default. They have
> to be requested
> by an smtp client using extra parameter on RFC5321.MAILFROM an RFC5321.RCPTTO
>
> But not every MUA has the ability to do this. Some years ago I had a
> requirement to
> force DSN on successfully deliveries for every message send by a
> simple smtp client as a dedicated mailstream.
>
> So I wrote a little patch to let postfix smtpd insert the necessary data.
There is no need to patch. Use smtpd_command_filter instead. See the
examples in the postconf(5) manpage for how to modify MAIL FROM,
RCPT TO, and so on.
Wietse
