Is this a way to change to the postmaster account in Exchang 2003? This account this is currently being used needs to be removed.

Please see below link:http://support.microsoft.com/kb/313832Anil

The postmaster mailbox is an account that receives NDRs and sends delivery status reports of messages to the sender. By default, Exchange Server 2003 creates the postmaster proxy address and designates this address to the user who created the Exchange organization, usually its the Administrator account Please see the Managing the Postmaster Mailbox section in Exchange Server 2003 Scheduled Maintenance Tasks