Select the Sent Items folder.
Select or double-click the message so it opens in another window.
Select File > Info.
-
Select Message Resend and Recall > Recall This Message..., and select one of the two options.
Select Delete unread copies of this message to recall the sent message.
Select Delete unread copies and replace with a new message to replace the sent message with a new message.
Select the Tell me if recall succeeds or fails for each recipient check box.
Select OK.