IRM - Information Rights Management is the coolest way to restrict the permission of the Outlook messages. Before it use to go, your system administrator is need to install and setup the IRM feature to your mail server. If your administrator is pre-setup it you can see it under "Options" tab as a "Permission" in a new mail writing window.
- Encrypt - The message was encrypted.
- Normal - No sensitivity level is assigned to the message.
- Private - The recipient will see Please treat this as Private in the Info-bar.
- Personal - The recipient will see Please treat this as Personal in the Info Bar.
- Confidential - The recipient will see Please treat this as Confidential in the Info Bar.
- Do Not Forward - All access restricted.
- File -> Options -> Mail.
- Under Send messages you can change the default Sensitivity level.