Author: Jan Ingvoldstad Date: To: exim users Subject: Re: [exim] How can exim do this?
On Wed, Mar 4, 2015 at 3:09 AM, Chris Siebenmann <cks@???> wrote: >
> If you cannot assume any backend MUA cooperation or setup, I
> believe that your only completely reliable choice is to rewrite the
> origin address of incoming email in the MTA (in both the envelope
> and in the From:/Reply-To:/etc headers). The simplest approach
> would be to just make up random local destination addresses (say
> 'outside-<random>@<yourdomain>') and maintain a database of what each
> 'outside-<random>' requires as the local From: and the destination To:
> address(es). You probably want these to be long-term database entries
> given MUA address books and so on.
>
> (This gets all sorts of challenging in the face of multiple recipients,
> especially if you want them to be able to cc: each other on replies. Life
> is simpler if you can assume that this doesn't happen.)
>
