Answer
Remove the account in Mail on your Mac by going to Mail > Preferences, then Accounts. Select an account and hit the Remove button. Note: If other applications on your Mac rely on this account, it will be deleted from Internet Accounts System Preferences once you do so.
How to Add-Remove Email Accounts from Apple Mail
iPhone: How To Delete An Email Account ( 2018 ), With The NEW IOS UPDATE 11.2.2 .
Select the email account you want to delete from the Mac by clicking it with your mouse cursor.
Choose Manage Accounts, and then the account you want to delete.
If you’re using the Outlook desktop program, select Personal Folders/Mailboxes at the top of the window and then right-click or ctrl-click on the Mailbox in question.
On Google.com, sign in to your Gmail account. nSelect the grid icon in the upper right corner and choose “Account.” nUnder the “Account preferences” heading, pick “Delete your account or services.” nChoose “Delete products.” Enter your password after that.
On the bottom left, click Users & Groups. Select the padlock icon. Enter your password. On the left side, select the admin user and then choose Delete User from the list of options.
A: Simply reveal the triangle and look at each inbox separately. You may also drag the unified inbox to your Favorites bar and pick from it. Alternatively, you may drag each to the bar to keep them separate on the bar.