Chapter 4. Mail Server with Postfix

Nowadays, many people are already using configured and reliable web-based mail services such as Gmail, Yahoo, and so on. Most of those people are questioning the need for a local e-mail server installed inside their server environment. Well, servers also need to send e-mails, not only humans; and it is useful for many other needs, especially when notifying an administrator if a server is in a critical state.

Postfix is a high-performance open source Mail Transfer Agent (MTA) for Linux systems. It is fast, easy to administrate, and secure. It helps to route and deliver electronic mail. Postfix supports encryption and virtual domains, and its configuration files are clear, and easy to understand, and edit.

The installation of Postfix will be divided into multiple sections. Since this chapter is all about setting up an e-mail server using Postfix and adding some tools to make it fully qualified and then securing it, we will do the installation step...