How to setup a full-featured email server on OpenBSD 7.5

[J65nko]

From https://dataswamp.org/~solene/2024-0...#_Introduction :

This blog post is a guide explaining how to setup a full-featured email server on OpenBSD 7.5. It was commissioned by a customer of my consultancy who wanted it to be published on my blog.

Setting up a modern email stack that does not appear as a spam platform to the world can be a daunting task, the guide will cover what you need for a secure, functional and low maintenance email system.

The features list can be found below:

• email access through IMAP, POP or Webmail
• secure SMTP server (mandatory server to server encryption, personal information hiding)
• state-of-the-art setup to be considered as legitimate as possible
• firewall filtering (bot blocking, all ports closes but the required ones)
• anti-spam