The Trash folder is available for each application in your account. When you open the Trash folder from the application, only items for that application are displayed. But when you select Empty Trash from any application, items from all applications are deleted.
Before you empty the trash folder, you can recover files from the Trash by dragging and dropping them into another folder.
If Recover Deleted Items displays when you right-click the Trash folder, you have the ability to recover items you deleted from any of your Trash folders.
Right-click on the Mail Trash folder and select Recover Deleted Items.
Select one or more items to recover.
Click Recover To and select the destination folder or create a new folder.
Click OK.
Click Close.
Items deleted from Trash can be recovered within 30 days of deleting them from the Trash. After 30 days, the items are permanently deleted.
Messages left in the Trash may be automatically purged, in which case you cannot recover them.