All of a sudden, when I try to send a message through my MobileMe email account from my iPhone, it tells me that the sender address is invalid. Is anyone else having this problem? Edited: I found the problem. When I updated the Software/Firmware to 2.0.2, the Mail Accounts must have not been restored properly. To fix the problem, I had to delete my MobileMe Mail account, and set it back up again.... all on the iPhone, of course.