@Tutanota great to hear! Im actually considering to switch to tuta, from protonmail, for my personal mail, as having a synched calender across my devices which are end to end encrypted is a really nice pro to have, especially considering that notifications also work on my googless android device. Keep up the good work.
@blacklight447 Yes, we plan to have the entire client audited after we have enabled post-quantum crypto in a hybrid way, most likely next year.