How to Remove Deleted Emails
You have two options for deleted emails that have been sent to Trash. Either choose which ones to permanently remove or empty everything in the Trash folder.
Open the Mail app and navigate to the Mailboxes menu. Select Trash. If you have more than one email account on your phone, find the Trash folder that corresponds to the account from which you want the emails deleted. Select Edit, select the specific emails you want to permanently remove, then choose Delete. Or, to remove all the emails at once, select Edit > Select All > Delete. The emails you deleted are gone from the Trash folder and cannot be recovered.
