Mail Autoresponder Message

Hello!

We have Exchange 2007 running on Windows 2003 server. Now we have move to new domain name.
I wish to set autoresponder message in Exchange so that whoever sends email to us will receive an autorespond message saying that this email address has been change from old email address to new email address.

Example An Autorespond Message:

Please be informed that this email address < "nick@example.com > has been changed to < "nick@example.net >. Thank you.

Thank you!