I’d like to give everyone a somewhat complete update on this feature request.
The feature “Undo Send” has been available on Outlook.com for a while now. With it, you can set a small delay of up to 10 seconds when sending all your email messages.
Additionally, we plan to make available a bigger feature that is along the lines of “Schedule Send”. At the moment, I cannot provide a time estimate for when it will show up for you. However, we’re very excited and hopeful :)
Thanks for your patience. We’re putting Hiding the “Conversation History” folder (and other empty, unused folders) under consideration, for possible Outlook.com improvements.
Thanks for trying the Outlook.com beta! Your feedback is critical to our success.
This is a feature we have planned, and will enable in a future update.