On Sat, Dec 22, 2018 at 07:32:37PM -0600, Matt Saladna wrote:
> I have an odd setup in which each base directory contains a complete
> virtual filesystem with potentially overlapping usernames (UIDs are
> unique). domain1.com could consist of system user user1 (UID: 500),
> user2 (UID: 501). domain2.com could consist of user1 (UID: 502), user12
> (UID: 503), and so on. Any mail generated from shell that depends upon
> Postfix to append $myorigin will append the server name instead of the
> local virtual domain.
>
> Setting $myhostname and $append_at_myorigin backfires with this setup,
> because that happens after pickup in trivial-rewrite that operates
> outside the virtual filesystem, so the real server name is always used.
> Mapping these users via /etc/aliases won't work either since usernames
> are not guaranteed to be unique across accounts.
>
> Is there a way to either:
>
> - Log the UID of pickup and rewrite sender based upon it
> - Convert the sender into a FQDN before pickup, for example if mail
> generates via cron
No, for this you also a separate Postfix instance for each logical
container. By the time the mail leaves the container it is too
late.
--
Viktor.
