It's I guess tangentially related, but in terms of de-googling, I've been using docker mailserver https://github.com/docker-mailserver/docker-mailserver https:/

It's I guess tangentially related, but in terms of de-googling, I've been using docker mailserver https://github.com/docker-mailserver/docker-mailserver https://github.com/docker-mailserver/docker-mailserver for a few years now and it is great. Combined with bluemail, thunderbird clients, backblaze for backup, and solar panels, it runs in my house and is basically free. For resiliency I do pay for a backup MX, which is about $5/year per domain. It took a few hours to set up, supports many users (family and friends) and maybe 1h every 3 months to update and check all is good.