The first step to setting up an email server is having an SMTP server. SMTP sends and receives email. Whether we want a full email server or just the ability to send automated email by script, we will need SMTP, and Postfix is the standard SMTP server. Here let's set a server up. Note that our goal is to be able to send emails from our server. If you want a full email server, this is the first step, and we will address the rest later.
