How to recall an email message 

1) Log-out of your webmail.domain.com (Microsoft Outlook Web Access) and close your web browser.2) Open the Microsoft Outlook.exe program installed on your local computer (and configured with access to your email account)3) In Outlook under the "All Mail Folders" section to the left of the Outlook navigation pane Click "Sent Items" 4) Find the email message that you wish to recall in the "Sent Item" messages list and open the message.

5) Click "Actions" in the top left menu bar.6) From the List then click "Recall this message."7) Click the radio button next to "Delete unread copies of this message." Click to deselect the check box next to "Tell me if recall succeeds or fails for each recipient" if you do not want Outlook to notify you regarding the status of your recall request. Click "OK."8) Look at the line above the "From" field in the message you attempted to recall. Outlook displays a message indicating the date and time you attempted to recall the message. Close the message.

Note: Recalling a message is not 100% as it requires the recipients email service to also be exchange based and a policy permitting you to recall off their server. Current version sof Oulokk will delay outbound emails for a period of time before sending so the faster you recall the more likely it will work.