Hi, this may be slightly off-topic, but does anyone know a free way to convert a .pst Outlook mailbox into an mbox to import it into Thunderbird (on macOS)? Can’t seem to find anything but paid and slightly dodgy software or free online service that require you to upload your file to a cloud (which is privacy no-go). Thanks!
You can use this repo, it needs some terminal commands but it is local.
One of the ways I’ve done this in the past is to set up a dovecot container, and then add IMAP account to outlook and copy all the email across. In that case I wanted it in Maildir format.