I am using Outlook and Postbox mail clients on a MacBook Pro. I need to transfer all my mails from Outlook 2011 to Postbox. I downloaded the Import Export tools in Postbox but it seems that they are not built to import OLM files that are stored in outlook 2011.
So, how can I import the OLM files from Outlook 2011 to Postbox? I have approximately 6 years of emails that I need to import.