This article explains how to send email from the Raspberry Pi. It is a generic procedure and also works on other Debian distributions. This is not for receiving mail, only for sending it. (Receiving email on the Pi is a much more involved process, requiring your Pi to preform the role of a full mail server).
The ability to send mail across the internet is useful. It enables your scripts and applications to send you email about system events or sending data such as pictures from a webcam. Continue reading