Choose New Message from the Compose menu.
A Compose window is displayed.
Compose the message as you normally would.
Choose Draft Message from the Save As button at the bottom of the window, or from the Save As submenu of the File menu.
The Mailer Save As Draft dialog box is displayed.
Type a file name under Draft Name.
Mailer saves the draft in the default mailbox HomeDirectory/MailDrafts.
You can also save the message body only as text by choosing Text from the Save As button.