[bpfrh]

As long as you use a VPS with a dedicated IP and configurer DKIM and SPF correctly gmail doesn't block you.

A easy solution for selfhosting would be mailcow.

Setup is basically a shell script which sets up the docker containers.

Backup and update is also just a shell script. Includes spamfilter and a nice webgui as well as the sogo webmail.

Mailpile is just a client, it has no bearings on the privacy.