Google Takeout saves emails in mbox files. These files are based on the generic mailbox format but use a proprietary format for message status information (unread, deleted, etc.). Aid4Mail will recover emails and their status information.
In order to process these emails, simply select "Google Takeout" in the "Mail Source" screen, then select the mail folder location on your computer. Then just follow the wizard to complete the migration.
If you experience any issues, please don't hesitate to contact us by raising a ticket.
If you would like to buy an Aid4Mail license, visit the Aid4Mail website.