If you need to view the address of the original sender, you can do so by viewing the source header information in the message. However, forwarded emails may or may not display the original sender’s email address in the body of the message. When you view messages in your inbox, you can usually spot emails forwarded from your other accounts by simply looking for your own name in the Sender pane – assuming the forwarded accounts use your name as the sender.
Using Headers for Original Sender Information