When I purchased MobileMe, I chose a mobileme email address. When I send from that address, ie: firstname.lastname@example.org, and recipients reply to that email, the email address that populates back is email@example.com. I do not have a .mac address and thus the senders receive an undeliverable message. How do I get rid of the .mac extension on replies? It happens with everyone so I'm assuming there is a setting somewhere I'm missing?