Introduction
When an email is deleted, it is moved to the Deleted Items folder. You can have up to 30 days to restore the email to your inbox from the Deleted Items folder. If you delete an email from the Deleted Items folder, it will go to the Recoverable Items folder. You have 30 days to restore the email from the Recoverable Items folder. If you decide to delete an email then empty your trash folder, it is gone and cannot be recovered. Please be cautious about what emails you delete and be sure to look through your trash folder before you empty it. This function is available in most versions of Outlook.
Note: Information Technology does not recover deleted or lost email items.
Outlook 2013/2016
1. Open Outlook application
2. Open your Deleted Items folder
3. Click Recover Deleted Items From Server
4. Click or press Shift and click at the same time to highlight the items you want to restore then press ok.
Note: to recover deleted items, be sure to click on the Restore Selected Items button.
Outlook for Mac
On Outlook for Mac once an email has been deleted from your Deleted Items folder, you cannot recover it.