In the default mode, it transmits a mail to an SMTP server which takes care of further delivery. To use this program with your mail user agent (MUA), create a configuration file with your mail account(s) and tell your MUA to call msmtp instead of /usr/sbin/sendmail.

Modern email is a patchwork of protocols and extensions. Here is one article to understand them all.

In this blog post, you will learn everything you know to setup a secure and low maintenance email server

For this article, we will setup a mail server for hypno.cat, a small website for my thriving (hypothetical) hypnotherapist activity. I registered the website years ago because I liked the name, but never done anything with it beyond hosting an awesome animated file.