Using Classic Outlook on Windows for personal email, calendar, and contact management
By "Multiple Mailboxes" I mean that I have a single "Outlook Account/Profile" and within my single INBOX I have multiple specific custom mailboxes. And Sub-mailboxes within a few of those. So... when mail comes from Mrs. A it goes directly into that mailbox, and mail from Mr. B goes into a separate mailbox, etc. - as opposed to everything just getting dumped into the INBOX.