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.

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.

@Pissed
I use https://www.iredmail.org/

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

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

I’ve set up a https://stalw.art/ server recently, and I’m quite impressed. I appreciate that the entire mail service stack is taken care of by a single unified service, except webmail but Bulwark seems really solid. It also works nicely together with Postgres and S3, so I can have the same backup strategy as most other apps I’m hosting.

First and foremost for the outgoing needs of https://nord.pub/, but I’m seriously considering moving personal domains to it as well.

For infrastructure I’m using dedicated Hetzner hosts, with extra IPs for the mail servers, so that reverse DNS is consistent.

Largest problem I’ve seen is that Outlook.com is classifying the emails as spam, even with SOF, DKIM, DMARC properly set up… which is a big reason I’m hesitant to move all personal email as well. I realised that it could be a problem if I ever want to contact companies who use Office 365, which is a lot.

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