Go to the Sent Items folder and open the mail which you want to recall or resend. Click on the Office Button located on the top left-hand corner of the Ribbon. Select the Info command, then click the Message Resend and Recall command.
The Recall setting works similarly to previous versions of Outlook. When you click the recall command, the Recall This Message dialog opens. You are prompted whether you simply want to delete copies of your sent message or replace them with a new one. This feature only works for unread messages.
Clicking the Resend command opens your original message in a new Message window. Click the Send button to send the message.