Michael Lucas released a stellar book on the subject not long ago (https://www.tiltedwindmillpress.com/product/ryoms/). It’s pretty thorough, relatively up-to-date, and (like all his stuff) a fun read. It does a great job of demystifying the mechanics. As far as the implementation goes, I’ll put in another vote for Mailcow, which combines all of the components into a very usable docker stack.

The “easy” route is to use Mailcow. It spins up the entire mail stack as Docker containers and only requires minimal configuring and is easy to keep updated. You’ll still need to properly set all the required DNS records (like SPF, DKIM, DMARC) if you want others to actually receive your mail and not treat it as spam. But Mailcow has a UI that helps with most of the records you’ll need to set.

If you’re doing it just as a learning experience, you could go for configuring Postfix, Dovecot etc. manually. The last time I did it, I used this tutorial as a base. It’s not fully up to date, but it can still serve as a solid starting point.

This is my personal experience https://wiki.gardiol.org/doku.php?id=email%3Astart

All these… I am not self hosting at home though… I am using a Conatabo VPS… The vid you linked seems helpful too

https://tonyteaches.tech/mailcow-self-hosted-email-server/

https://mxtoolbox.com/

https://docs.mailcow.email/getstarted/prerequisite-dns/#references

How to set Reverse DNS (rDNS/PTR record) in Contabo server https://youtu.be/clPJqoIxCjs

I use https://nixos-mailserver.readthedocs.io/en/latest/setup-guide.html