A good idea, but I don't see any "friend" category. Maybe he has a completely separate personal email address... but he has a folder for family. I do something

A good idea, but I don't see any "friend" category. Maybe he has a completely separate personal email address... but he has a folder for family. I do something similar with my gmail account. Information emails are either deleted (your account has been activated!) or archived, depending on the content. Actionable emails (reminders, or emails that I plan on replying too) I keep in the inbox, until they are obsolete, then I archive them.