<< Why not really? OE shouldn't even have this problem, it's possible the server is getting it and it's set to a different time than what it should be. >>
Working in technical support, i see this problem about 10 times a day. Everyone assumes its the mail server wrong. 10 times out of 10 it's client side. 9 times out of 10, it's and incorrect GMT offset in the Operating System time properties. 1 time out of 10, its and incorrect system/BIOS clock.