Setting Message Options

Set message options in the Options tab.

To enable or disable the Cc box, select or clear the Show Cc check box.

To enable or disable the Bcc box, select or clear the Show Bcc check box.

To request a delivery receipt, select the Tell me when this message has been delivered check box.

To request a read receipt, select the Tell me when this message has been read check box.

By default, a copy of your message is saved in the Sent Items folder.

Setting Message Importance 

To advise recipients of the priority of a message, mark it as high or low importance. Messages not designated high or low have normal importance.
To set the message importance level, click the Importance: High
or Importance: Low buttons on the toolbar.