How to Delete an Email Account from the iPhone/iPad?
Apple iPhone – Remove an Email Account
Settings. Mail. . If an app isn’t available on your Home screen, swipe left to access the App Library. …
Tap. Accounts. .
From the ‘ACCOUNTS’ section, tap an email account.
Tap. Delete Account. (at the bottom; may require scrolling).
To confirm, tap. Delete from My iPhone. .