Deleted items are recovered within 15 days, if you have permanently cleared out your deleted folder
STEP 1: Highlight your deleted folder
STEP 2: Click on Folder at the top
STEP 3: Recover Deleted Items
STEP 5: After the emails have been restored, move the emails from deleted folder to inbox by dragging and dropping select emails into your Inbox folder, or press Ctrl and click first and last email to select a group or more than one.