With self hosting email, if the digital sovreignty aspect is more important to you than the privacy aspect...
What I do is use gmail with a custom domain, self host an email server, and use mbysnc[1] to always be downloading my emails from gmail. Then I connect to that email server for reading my emails, but still use gmail for sending.
It also means that google can't lock me out of my emails, I still retain all my emails, and if I want move providers, I simply change the DNS records of my domain. But I don't have any issues around mail delivery.
What I do is use gmail with a custom domain, self host an email server, and use mbysnc[1] to always be downloading my emails from gmail. Then I connect to that email server for reading my emails, but still use gmail for sending.
It also means that google can't lock me out of my emails, I still retain all my emails, and if I want move providers, I simply change the DNS records of my domain. But I don't have any issues around mail delivery.