Just follow these simple steps..
1. Send a friend request to the person you wish know email of, it is not necessary that he adds you. This trick also shows email of pending requests.
2. Go to friend tab present at the top near home and scrapbook.
3. Now navigate to manage contacts, present at lower right corner.
4. Click on the Export contact button. A file will be downloaded with all your contacts with names. Open this document in MS-Excel.
