One of the most common reasons why you can't open an e-mail attachment is because your computer doesn't have the necessary program installed to recognize the file format.
To access the Recoverable Items folder, please use a PC or Mac.
In the left pane, select the Deleted Items folder.
At the top of the message list, select Recover items deleted from this folder.
Select the items you want to recover and select Restore. Notes: You can only select all if all messages are visible.
