I don't need to receive emails from anybody.

I just want to be able to to send emails from [email protected] for password resets, email address verifications, things like that.

And I would like to at least make an attempt to have the emails I send pass through a basic spam filter. So I assume at the very least I need to setup DKIM and SPF records.

Is it as simple as following https://wiki.debian.org/Postfix and https://wiki.debian.org/opendkim ?

(That is the route I am taking right now, will report back here what I find out in a few hours!)