How to Create a New Contact Record in Outlook 2013
Click the Save & Close button.
You now have the e-mail address and any other information for the new contact stored for future reference.
Another quick way to capture an e-mail address from an incoming message: Right-click the name of the sender in the incoming message’s From field (in the Reading pane; this won’t work if you right-click the From address in the message list).
The From field is not a normal text box, so you may not think that right-clicking it would do anything, but it does: A shortcut menu appears. Choose Add to Outlook Contacts to open the New Contact form, and then follow the last two steps of the preceding list.