I've several email Account Forward with different external email@domain.
In a few cases I receive a (normal) "Relay access denied" from the destination mail server because the forwarded emails still have the initial forwarded email address.

How can I set my forwarder to send the message in a manner that can be accepted by those few servers?
(ex. that the forwarded email address is changed to the destination email address)

I'm sorry for my bad explanation .