The first sentence says it all. Sounds like linux cake meme. I would try finding docker image with all email things working out of the box - if such thing exists.

Suggestion to other providers is also... something. I have been using other providers. Proton does not allow me to use IMAP on free. Other servers have much spam, which I have been able to clear with some cronjob, but also that is a poor job. Besides... how do you know that other companies are better on serving you? How can I know if they sell my data to China?

And self hosting is tough, even though it is easier than has ever been.