But the admin response, in my opinion, does not address the requested feature which is to allow grouping contacts to prevent having to add multiple recipients, one-by-one. Clicking a 'group' contact is, I think, a most helpful feature.
Yes, please, subfolders.
Yes, please, this is fundamental. As has already been so well stated ... what is the point of folders if you cannot determine where the unread emails are located? As a new premium and additional alias purchaser, I too have set up folders,rules,aliases and just begun switching email from other services to Tutanota, only to learn about this issue. I don't mind supporting Tutanota as it is a very recent email service. Development requires much time and money, but one would hope this matter is high on the list of priorities.