

Let 'im. Blah, blah, blah…all the programs you run have access to the data within, I stopped listening at 4:05, he got a little too excited about the app having access to data, I mean, wtf?! Mozilla was simply spelling out the details so this guy now has a thing to pick at and become excited about.
Drivel.
sudo apt install claws-mail
Fast, reliable, insanely functional - weird formats. Yes it has a calendar, works great.