No, OE isn't friendly to that sort of thing. The only export/import of emails from OE I've ever had work reliably is exporting to Outlook... which I do a lot of as I wean users here off OE and into Outlook. Outlook handles archives and backups much better, but of course it's not free. If you have Office, you Outlook included.

I use Outlook myself, otherwise I'd have to seriously investigate some of the other email programs that are more robust and stable than OE (and less prone to security attacks.) Eudora and Pegasus spring to mind.