If you’re talking about getting rid of old accounts, it’s in Settings > Mail > Accounts. Tap on the account you want to remove. An option to delete or sign out of the account should be at the bottom of the page.
If you’re talking about getting rid of old accounts, it’s in Settings > Mail > Accounts. Tap on the account you want to remove. An option to delete or sign out of the account should be at the bottom of the page.