A customer has problems with the time for receiving messages. When he receives an email, the time is always one hour before the message is sent. So, when I send him a message from my computer (my time is 11:47), he receives the message immediatly but the time in his message is 10:47, althought, his time on his computer is correct 11:47 and the same timezone (GMT+1) as me. When he sends a message to me, the time is correct.
Has anyone an idea what this could be ?