Timo Sirainen:
> On 10.4.2012, at 19.28, Wietse Venema wrote:
>
> > Timo Sirainen:
> >>> I wonder if careful use of the DSN extension would help. With DSN,
> >>> the SMTP/LMTP client sends the original recipient with:
> >>>
> >>> RCPT TO:<final-rcpt> ORCPT=rfc822;orig-rcpt ...
> >>
> >> Does Postfix already send this if LMTP server advertises DSN?
> >
> > Yes :-) It's the same code for both SMTP and LMTP.
>
> OK. I guess I'll look into adding DSN support then.
RFC 6009 covers some aspects of Sieve/DSN (making DSN attributes
accessible in Sieve, not how to send DSN notification).
Wietse