[bluehatbrit]

Completely agree. I've moved to using proton mail for my main address purely because of the new calendar and migadu for all my other domains and side projects. If they had a calendar I'd go back to them for everything, they're great.

[lmas]

Migadu do have calendar/contacts but it's a bit tricky setting up, FYI.

Edit: For example, take a look at https://www.migadu.com/guides/thunderbird/ and at the end of that page there's some instructions for setting up calendar.