[Exim] Getting authenticated_sender with Bounces

Hello!

I am working with the authentication configuration and have an open
problem: When Exim generates a bounce mail, the process has no
authenticated_id and no authenticated_sender.

Is it possible, to change the delivery behaviour in a way, that the
MAILER-DAEMON becomes an authenticated user like any user, feeding
locally?

I am new to the Exim code, so a little pointer to the code will
appreciated very much, too. Thank You very much in advance!

Marian Eichholz

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