The drop down beside the envelope icon on the Online Details panel on the contact form or the Phone & Email panel under the Address tab of Communication will display the contact’s email address(es). A single click on the email address will open Outlook with the details.
Where there is a drop down beside the Skype icon this will display the contact’s Phone and Skype details. If Skype is installed on your system a single click on the Skype address will open Skype to that person.