Call Back a Wrongly Sent Email in Outlook

For Outlook 2003:

Open Sent Items.
Open the sent email then go to Actions menu and click recall this message.
     To replace the message:
               Select Delete unread copies and replace with a new message, then type whatever you want to replace it. You can also see who the recall was succesful for.
     To be notified about the success of the recall or replacement:
              Check Tell me if recall succeeds or fails for each recipient.


For Office 2007/2010:

Open Sent Items.
Open the message you wish to recall
Go to the Ribbon.
In the Actions tab, click Other Actions and select Recall This Message.
Choose Delete unread copies of this message.
To see who the recall worked for, check the Tell me if recall succeeds or fails for each recipient.