Gmail's New 'Undo Send' Feature

Sometimes after sending an e-mail, you immediately realize it was a mistake.In such situations we have nothing to do.Google understands your pain, and has introduced an Undo Send feature to Gmail. You can enable it by turn Undo Send on in Gmail Labs under the Settings panel of your Google account.Once the feature is enabled, an Undo option appears after you've sent a message. You have five