Exchange 2010, and Outlook 2010 - Issue with email imports from a MAC - Recieve date is incorrect.

Hi we have an issue where we imported email from the MAC Mail client and this email is missing the received date in the headers.  Is there a PowerShell script that would allow us to change the emails header information for a certain date (Shows the import date as received date) to the sent date (which is the correct date for the email)?