Self-Hosted Mail Server: Introduction » Mr John's Personal Website

Self Hosted Mail Server

If you’re comfortable with Linux administration and want to take control of your own email infrastructure, you’re in the right place.

Running your own mail server has a certain reputation. Depending on who you ask, it’s either a rite of passage for seasoned Linux users or a cautionary tale involving blacklists, spam floods, and late-night debugging sessions. The truth sits somewhere in the middle: it’s entirely achievable, but it rewards careful planning, attention to detail, and a willingness to understand how email actually works under the hood.

In this series, we’ll build a fully functional, modern mail server from the ground up using a stack based on Postfix, Dovecot, MySQL, and Rspamd. This isn’t just about getting mail flowing—it’s about doing it properly. That means secure authentication, reliable delivery, spam filtering that doesn’t drive you mad, and a setup that can realistically be used day-to-day.

Along the way, we’ll cover everything from DNS configuration and TLS certificates through to mailbox storage, authentication backends, and spam filtering strategies. Each component will be explained in context, so you’re not just copy-pasting config files—you’ll understand why each piece exists and how they all fit together.

It’s worth being upfront: running your own mail server in 2026 comes with challenges. Large providers are increasingly strict, deliverability can be tricky, and misconfigurations can quickly land your server on a blacklist. But that’s also what makes it interesting.

This article will be laid out as a collection of articles to form a complete guide. By the end of this series, you’ll have a working system—and more importantly, the knowledge to troubleshoot, maintain, and improve it.

Following is a list of articles from this series...

Introduction

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