Outlook.com provides users with the option to recover deleted messages which are not permanently lost. You can use this option when you have mistakenly deleted any messages from you Outlook.com.
Step 1: Click the Settings icon and select More mail settings from the menu list.
Step 2: In the Outlook.com Settings screen, navigate to Customizing Outlook section and click Advanced privacy settings.
Step 3: Navigate to Deleted messages section in Advanced privacy settings screen. Make sure to select radio option with caption as “Let me recover deleted messages”. Click the Save button to confirm and apply the changes.
Now when ever you want to recover any deleted messages, navigate to Deleted items folder and click recover deleted messages link available once you scroll down the Deleted Items folder.