@jankoekepan@artlav@nindokag I am now running my own email server (again, after being an email admin for half a decade.)
Obviously I'd suggest doing it ~in the cloud~ on a reserved IP with stable documented software, but the rest is just Normal Admin Stuff. Certainly doable and Gmail doesn't whine. (The key is DKIM+SPF+rdns and checking blacklists.)
"Engineering culture is about making the product. If you make the product work, that’s all you’ve got to do to fulfill the ethical warrant of your profession." https://logicmag.io/03-dont-be-evil/