[Dovecot] The submission server

Hi,

As many others I'm looking forward to the submission server. But I have a question:

A use-case with authenticated SMTP is to have the server restrict From/Sender headers based on the authenticated user. (and adding the actual authenticated user to the headers) Postfix supports this (AFAICS) and I can't imagine Exims doesn't either with it's elaborate config possibilities.

But will that be possible with the Dovecot submission server?

/Peter