You will see "Subject:", now type "testing" as the Subject, hit <Enter> and the cursor will wait on the next line for your input, so type "The Test" as the body of the e-mail and hit <Enter> again, next do <Ctrl+D> on the new line, this will close the mail and send it. ( you will see EOT printed and get your prompt back )
Next we will add a new account to Evolution:
- The email address is:
[email protected]
- On the Receiving Mail tab:
Server Type: Local Delivery
Path: /var/spool/mail/bruno
- On the Sending Mail tab:
Server type: Sendmail
That's all, now you can "send and receive" and you will see the test mail we sent above arrive in your in-box.
NOTE: For Kmail the settings are basically the same, you can use "FCNTL" or "None" as locking mode.
In Thunderbird the account type is "Movemail"
Have FUN sending mail to yourself, to root or to other users on your computer.

Bruno
Extra, some examples of sending mail in one command: