Importing maibox content from Outlook Express 4.x / 5.x / 6.x into Microsoft (Office) Outlook 2010 sounds quite easy thinking that are all Microsoft products. In fact are two separated products, Outlook Express with *.dbx database file type and Microsoft Outlook with *.pst database file format. Even if Microsoft Outlook provide import wizard tool where we can select to import directly from Outlook Express or Windows Live Mail, that function is tricky, mostly doesn’t apply for imported content from Outlook Express into Windows Live Mail added from different machine. This is the case when SO is changed, from Windows XP (Outlook Express support) to Windows 7 (Windows Live Mail support).
However you can import emails as follows: