- Overview of email and mail agents
- Installing Postfix
- Postfix services and commands
- Postfix configuration files
- Configuring a mail service
- Creating a mail gateway
Skill Level Intermediate
- [Grant] Welcome to RHCE Cert Prep, Linux Mail Systems Using Postfix. I'm Grant McWilliams, computer science instructor and Linux enthusiast. As you may know, one third of all internet SMTP mail servers in the world are run on Postfix. This is roughly 10 times more common than the most popular closed source alternative. In fact, Postfix is second only to Exim in the number of working internet mail servers, so there's a good chance you may run into it. In this course, we will create a virtual machine lab environment for testing Postfix mail server operations, including mail relaying.
We will install the Postfix mail server and set it as the default mail transport agent. We'll also spend time getting to know the path that mail is routed through Postfix, and how email headers are rewritten, as well as various services and agents processing email, and the commands used to administer them. Postfix has many different configuration files that seem to do very similar jobs. We'll demystify them, as well as show examples of how to create aliases, forwarding, and virtual email groups. We'll then create a local Postfix mail server and test it before moving on to create a Postfix mail relay.
We will cover all Postfix specific objectives on the Red Hat Certified Engineer exam. I love Linux, and I'm excited to teach you about Linux mail systems using Postfix for the RHCE Certification. So let's get started.