How do I open mbox from my takeout

1. install the addon, importexporttools NG
2. highlight Local Folders in folder column on left side of screen
3. rightclick and select the importexport option to import mbox

If you downloaded your emails using Google Takeout, you may have received an MBOX file containing your Gmail messages. You cannot usually open this file directly by double-clicking it, but you can access its contents using an email client that supports the MBOX format