@DidacticDumbass@lemmy.one If it helps you, I started with https://mailinabox.email, which is incredibly easy to set up.
Right now I'm using https://github.com/docker-mailserver/docker-mailserver which I feel it is a bit trickier, but more escapable in the long term
@Magrid@lemm.ee apparently I can do it from my own instance, without registration!!! 😃