To recall a message without sending a revised message, do the following: People don’t generally recall a lot of messages (if they do, perhaps they have another problem) so it’s unlikely that the average user will immediately know what option to take (or where it is located) to recall a message. The first barrier to recalling a message is Outlook’s user interface. After all, the longer a message resides in the recipient’s Inbox, the more opportunity he or she has to read the blessed thing and expose the reason why we wanted to recall the message in the first place. It’s logical that time is critical when it comes to preventing a recipient having the opportunity to read a message that we wish they don’t see. Of course, Exchange clients have been able to recall messages for a long time – I believe it was one of the features of the Outlook 97 release – but in any case attempting to recall a message has long been an exercise in sheer futility.
Don’t worry, With Outlook 2010, you can recall a message after it’s sent” and pointed to the Office web page that explained all. A recent tweet by Brian Winstead exclaimed “ Didn't mean to send that.