Replying to
@tinker@infosec.exchange
@tinker@infosec.exchange I been using mail-in-a-box pretty happily for the last few years. you get yourself a linux server on your favorite cloud provider (I'm using linode at $15 a month) and buy a domain name, then run the setup. so some nerdery required but not a lot. it doesn't want much babysitting; at least, it runs fine without me thinking about it, then every for or five months I remember, oh I should look for updates, shouldn't I?
https://mailinabox.email/