[Exim] Mailer-Daemon and multiple domains ?

Hi,

I'm running an ISP with multiple domains and some domains correspond to
Virtual ISP's so they want that the Bounced mails coming from
Mailer-Daemon were with their own domain.

I think that better than this (because they have too many domains and
each day have more) the better solution is to implement a Mailer-Daemon
that will use the domain of the cusotmer.

For example, let say my domain is "myispdom.com". If the
"customer1@???" send an e-mail to an unexisten address he will
receive a message from:

"Mailer-Daemon@???"

Instead of this, I want that he receive an e-mail from
"Mailer-Daemon@???"

Is there a way to do that with Exim 4.30 ?

--
Saludos....

Daniel Bendersky.

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