...
Background
This feature requires you to use a Microsoft Exchange e-mail an Exchange email account. The recipient of the mail email you want to recall must also be using an Exchange e-mail account. For example, you cannot recall a message sent to someone's personal (gmail, yahoo) account. If the message was sent to xxxxx@albany.edu, it most likely cannot be recalled. Also, the success or failure of a recall depends on the settings the recipient has in Outlook.
...