I was just involuntarily switched over to Outlook.com from Hotmail. I need to regularly "select all" contacts for bulk e-mails. I have not been able to figure out how to do that now that it's changed. Please tell me there is a way!
When creating a new email, click "To" on the left-hand side and select the name of a group you want to send to.
If you don't have a group already set up, you can go into People (using the little down arrow in the top left) and select all the people you want to from your list and add to a new group.