If the deleted items was emptied, you can try to see if its’ in your “Recover Deleted Items”. If your e-mail was hard deleted, then you would need to enter the following registry entry to provide the “Recover Deleted Items” to those other special folders like Inbox, Sent Items, etc.
Start Registry Editor.
Locate and then click the following key in the registry:
On the Edit menu, click Add Value, and then add the following registry value:
Value name: DumpsterAlwaysOn
Data type: DWORD
Value data: 1
Close Registry Editor.