Both email file formats are different and stored their data in different ways. So, there is no direct method is available to import MBOX file in Outlook to open Thunderbird email data.

How to Use downloaded Gmail Archive MBOX file in Outlook 2019, 2016, 2013, 2010, 2007, 2003, 2002, etc. versions. Google Mail Takeout service allows you t ...

Using Eml2mbox Download eml2mbox (link in Resources), then double-click the downloaded archive to open it and drag the "eml2mbox.rb" file to the directory containing the EML files you want to convert.

Try making a copy of the mbox files and move them into another mail client like Thunderbird (uses standard mbox files too). <BR>There are several howtos on this topic, easily found with Google.<BR ...

I am currently using KMail, which I gather stores its messages in maildir format. I want to convert it into Apple's Mail.app format, which is mbox. Anyone know how I can go about this? Google ...