If the recipient opens the recall message first, the original message is deleted, and the recipient is informed that you, the sender, have deleted the message from their mailbox.

However, the message remains in the recipient's Outlook folder. On the recipient's computer, under Trackingthe Automatically process requests and responses to meeting requests and polls check box is selected. In the following table, five scenarios are presented. The success or failure of a message recall depends on the recipients' settings in Outlook. Click Delete unread copies of this message or Delete unread copies and replace with a new messageand then click OK. Selecting the message so it appears in the reading pane won't allow you to recall the message. You must double-click to open the message. Open the message that you want to recall. In the folder pane on the left of the Outlook window, choose the Sent Items folder. For example, if you forgot to include an attachment, you can try to retract the message, and then send a replacement message that has the attachment. You can also substitute a replacement message.