One thing I have noticed in using #Tutanota is that I have difficulties handling links in email. I suspect that this is something that has something to do with them having no knowledge of the email content, but plain-text emails with URLs are not clickable. That wouldn't be a big deal, but I'm finding I cannot easily select URLs in either the desktop or iPhone to copy them and paste them to a browser. On the iPhone, it's almost like there's an extra layer in front of the text at times.