Using Classic Outlook on Windows for personal email, calendar, and contact management
Again, who is your mail provider - that is, what comes after the @ in your address? Which version of classic Outlook are you using? If you click File>Account Settings>Account Settings and select the Email tab, what do you see? When I say use a web browser to access your mailbox, I'm talking about using Chrome, Edge, Opera, Firefox or some other web browser to connect to your mailbox. For example, to access a Gmail mailbox with a web browser, you would visit the link https://gmail.com/. To access a Yahoo/Verizon/AT&T mailbox you would visit the link https://mail.yahoo.com/.