Greetings

Started way back when when I got to the web full-time using webmail.
Haven't ever setup an email system and AIUI it is a system - - - there are
a lot of parts that have to work together to have everything working well.

A mentor, now deceased, recommended using Claws but even that's not all
that's needed for an email system. So - - - I'm looking for recommendations
on what and how to setup an email system. The why you're using what you are
is vitally important for me (as are my security and privacy).

Please

TIA