Is there any way to determine from a message header who the ACTUAL sender of a message is when the sender is sending a message using the "Send As" function. For example, John is granted "Send As" permissions to Sue's mailbox. John sends a message but elects to send the message as Sue. Is there ANY place where there is an indication that the message originated from John and not Sue? (NOTE: this is for the Send As function and not the Send on behalf of function.)
Thank you-
John
