Stumbled upon the post by Lukas Mathis about self-hosting and services and remembered that I've been planning my migration to own mail server for quite a while already.

So I checked the mail services once again and in the end set up Proton mail as a main service for mail, also switched it to my domain so if I plan to change the service I'm not losing my address. Like for the case if I lose my Google account.

The configuration was very easy and started working right away, guys from Proton did a great job here.

So now I'm rayslava at rayslava.com, and my GPG keys need an update.