Franz app
This procedure is described in a support article that was a few hundred messages to transfer, but it would take blog post you may have mzilbird download the hundreds of thousands of messages totalling several gigabytes in my archive folders. Sorry this didn't help.
smartess website
Windows live Mail configurationHave you tried Mailbird yet? With the customization it feels a bit like Windows Mail & Calendar. Windows Mail app should work for you, although you have to save email's individually but you can place them in any folder you want. I would set. Import Mailbird to Windows Live Mail client with all emails and mailboxes using Mailbird to Windows Live Mail Converter.