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Users in mixed Exchange mode (2003/5.5) receive (sometimes) a delivery Status notification from a certain user's mailbox. &nbsp;How can I change mailboxes that these emails appear to be sent from?
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Users in mixed Exchange mode (2003/5.5) receive (sometimes) a delivery Status notification from a certain user's mailbox.  How can I change mailboxes that these emails appear to be sent from?

Delivery Status Notification

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.