Sadly, yes: nothing is perfect. It's the same problematic for personal email, if you choose to run your own server (or use any free alternative prism-break.org)

Sadly, yes: nothing is perfect. It's the same problematic for personal email, if you choose to run your own server (or use any free alternative prism-break.org), your recipients will still be using the classic big providers. However, even if nothing is perfect, you can take the decision to try to make it right (and if everybody does the sames, it ends up working :) )