I have a computer running Outlook 2k3 and even though the system time is right and the time is right on her smartphone, the message's timestamp shows it an hour early. The test e-mail I sent had a timestamp of 10:01 when it was in fact 11:01.
The computer is a Dell Dimension desktop running a fully updated Windows XP. The mail is received from an server running Small Business Server 2k3 and is through an exchange server.