I want to delete my existing email accounts and set up new one . How fo I do this

To delete e-mail accounts

1. In the Mail app on your Mac, choose Mail > Preferences, then click Accounts.
2. Select an account, then click the Remove button . Note: If the account is used by other apps on your Mac, you're asked to remove the account in Internet Accounts System Preferences.

Add an email account

1. From the menu bar in Mail, choose Mail > Add Account.
2. Select your email provider from the list, then click Continue.
3. Some accounts, such as Google, might ask that you click Open Browser to complete authentication in your web browser.