BUT , use your login name instead of the user joe . This means the mail will be sent to yourself. This is the best way to learn all the features of mail , without distracting other people. This specifies options for how the mail program works. One of the options is asksub , which tells the mail program to ask for a subject heading.
Subject fields are limited to a single line.
The mail program is now in compose mode . Enter each of the following lines. At the end of each line press . This is my first UNIX mail message. I am entering the contents of this message in compose mode.