Many users delete their emails in the wrong way. But fortunately, there is a way to recover permanently deleted emails in Outlook. Simply open the ‘Deleted Items’ folder in Outlook and right-click the email. If the file has been accidentally deleted, you can undo the action. Alternatively, you can click on the Deleted Items folder and then right-click on the email. If you’re unable to locate the email, you can restore it using a deletion recovery tool.
See also — https://emailspedia.com/how-to-recover-deleted-emails-from-gmail/