A tutorial from Make Tech Easier demonstrates how to use Mail-In-A-Box to set up a Linux email server.
How to Create an Email Server in Linux with Mail-In-A-Box
Mail-in-a-Box is a small, yet effective program that aims to create an easy to deploy, all-in-one email server solution in your machine. This tutorial shows you how you can install Mail-In-A-Box on Ubuntu Linux.
How to Create an Email Server in Linux with Mail-In-A-Box