Therefore if you need to transfer or export Mac Mail to Outlook PST format, one need to sync or move. This email format cannot be used with any other email client since it is not supported. All the data in the Outlook account like the emails, Calendar, Contacts, Attachments, etc., are stored in Outlook in PST file format and is stored in the local database of the system.
The PST file is the proprietary file format for Outlook provided by Microsoft.
