Okay, I am tossing my old machine with ISPConfig 2.x. I will be installing a new server with ISPConfig 3.x. I know that you CANNOT migrate the data. However, how can I move the POSTFIX data files and email accounts so that I can keep the users from losing all of their IMAP and unreceived POP3 email? Or, restore their mailboxes to the new POSTFIX once all of the accounts are re-established on the new ISPConfig?