If you mean the INSTALL.txt (IIRC) from the postfixadmin .tarball, I had gone through that and a couple other guides. I filed a bug with Ubuntu because they don't include it in the installed documents.

I'm doing a "clean" rebuild right now to verify my documentation and make sure I didn't miss anything. I'll give it another lok.

On Sun, Sep 12, 2021 at 11:05 AM Benny Pedersen <me@junc.eu> wrote:

On 2021-09-12 18:38, C. Petro wrote:
> To be more clear about my problem.
>
> This server will be hosting multiple email domains, and I would prefer
> to have the filesystem structured like /var/mail/vmail/<domain>/<user>
> rather than /var/mail/vmail/<user>@<domain>.

use setup guide from postfixadmin, and it shows how to do the dovecot
part like you wish above, even if you dont want to use postfixadmin the
dovecot setup will work alone aswell