Basic Sendmail Setup

Sending email from your server can be used for about a million different things. Working on a project recently, I realized I had never set up my server to send email to external addresses (like Gmail, for example). On a sidenote, because of the email-to-SMS services that all mobile carriers provide, this also allows you to text mobile phones (assuming you know their mobile number and carrier). Keep in mind, this tutorial is strictly for SENDING email. Receiving or processing email is not included in this tutorial.