How to Prevent Email Recipients from Replying to the Sender?

Hi,

I am currently working on an application which emails its users of status updates.

In a properties file within the application is where I specify the following:

1. SMTP email server host name

2. Sender's name

3. Sender's email address

Emails are being sent out whenever there are status updates, but how do I prevent users from replying back to the Sender's email address?

I do not want users to send emails to the Sender's email account.

Any help on this would be greatly appreciated.

Thanks,

Nancy