I've been using my iPhone along with my PC for a while now, but recently I've purchased a MacBook Pro. However, I'm still struggling with the problem that the unread e-mail I've opened on my iPhone is still marked as unread in Mail on the MacBook, and vice versa. This forces me to open e-mails on both devices, which can be quite a drag when you're receiving up to 50 e-mails a day. Is there a way to synchronize the read-status of the mails in my inbox?