Outlook.com fully integrates with social networks like Facebook and Tweeter,to provide you interactive emails (picture of senders, tweets , status).
But if you are looking for a plain mail application and wish to disable these features:
- From your Outlook.com home-screen, click on Settings > More Mail settings.
- Go to "Reading email" > "Active view settings".
- Under "Do you want to enable interactive email?" select "No".
- Click on Save to validate.