Creating an email account for corporate policy

[treslayew]

Our company has a policy that all employees may have their emails read. There has been an email account set up and the appropriate permission given to those people who need to, if necessary, read other people emails. The problems is when these people (the bosses) access the mail from the mailbox that has been created to recieve all the companies mail the original person who sent the email gets a read message in their outlook window letting them know that someone else has read their mail. How do I turn this function off so the users don't know that their mail has been read.