I don't believe its possible, on the receiving end sorry. IMHO, you can only get it from the sending side.
That data is literally stripped off, prior to the send to each of the recipients, on the outbound messages.
Only other way (if you weren't the sender) would be if you were the mail admin, and could see what messages were sent, etc.
~ hayabusa ~
"All men can see these tactics whereby I conquer, but what none can see is the strategy out of which victory is evolved." - Sun Tzu, 'The Art of War'
OSCE, OSCP , GPEN, C|EH