By default, when an item is deleted, it is placed in the Deleted Items folder. Items remain in the Deleted Items folder for 30 days by default. If you need to recover an item deleted more than 30 days ago or if you emptied your Deleted Items, messages are recoverable for an additional 14 days.
Step 1
Click Mail.
Step 2
Click on the Deleted Items folder tab on the right-hand side of the page.
Step 3
Click Recover items deleted from this folder (# items). Note: # is the number of items that are recoverable.
Step 4
Select the items you would like to recover and click Recover Selected Items. Recoverable Items will appear below.
Step 5
Select the emails you would like to restore then click on Restore in the pane to the right. The items will be restored to the folder they were deleted from.