A bit old, but still really useful, i used this method on a server. Article by Tom, first posted on Tombuntu
Wouldn’t it be useful if your computer could email you? I’d like to be notified by email when my server is in trouble, but I don’t want to run my own mail server. sSMTP is perfect for this; it’s a simple way to send email from your system to an SMTP mail server, like Gmail’s.
Here’s how I set up sSMTP on Ubuntu to send mail through my Gmail account.