I know the pain and the annoyances of hosting Email. But still, I won't switch to big providers, I use Proton Mail personally, and Postale.io for many projects

I know the pain and the annoyances of hosting Email. But still, I won't switch to big providers, I use Proton Mail personally, and Postale.io for many projects. There is also mailbox.org and many others, you have a choice to not use the big providers, it totally possible.