How to Host Multiple Mail Domains in PostfixAdmin on Ubuntu

This tutorial will be showing you how to set up multiple mail domains (virtual hosting) on Ubuntu server with PostfixAdmin, which is an open-source web-based interface to configure and manage a Postfix based email server for many domains and users.
Prerequisites
To follow this tutorial, it’s assumed that you have already configured PostfixAdmin with one mail domain and you have followed part 4 to set up SPF and OpenDKIM.

#mail server #ubuntu