How to remove an email account in Mail

1.Open Mail (click it on the Dock or open it from the Applications folder).
2.From the Mail menu, choose Preferences..., or press Command-, (the Command and comma keys).
3.Click the "Accounts" icon.
4.Select the account you wish to remove.
5.Click the "-" (minus) icon. You will be alerted that "The account's setup information, mailboxes, messages, notes, and to do's will be deleted permanently from your computer."
6.If you are sure you want to remove the account and email messages from your computer, click "Remove" to complete this process.