My old ost files migrated from my Windows 7 PC - Windows Live Mail or Windows Mail - are still lying in my back up directory and I now want to import the files to a suitable Mail Client software in Windows 10.
Windows Live Mail or Windows Mail are no longer available in Windows 10.

How can I import these OST files - and not PST files - into Windows 10 Mail?

Or can I only import them into Outlook?

***Post moved by the moderator to the appropriate forum category.***