Using Classic Outlook on Windows for personal email, calendar, and contact management
I monitor more than 20 emails account from several companies and business. Outlook should learned from winmail. Even Outlook express and succesor winmail (windows mail in vista) are a way better than MS outlook. I am still using winmail in windows 10 following the instructions in https://www.eightforums.com/threads/how-to-reinstate-winmail-onto-windows-8-or-windows-10.3698/page-36#post-566058
Everytime Windows 10 launch a new update , it removes the winmail from the system and it's neccesary to setup again from a backup, but it still worth it.
WinMail is better, faster, unified inboxes, folders, rules, the reading pane is better, the distribution of the space in the screen has the information needed, no more, no less.