If you want to open the Outlook files into other email clients then you can simply go with ZOOK PST to EML Converter. It is the best solution to export the files format without losing a bit of information. It offers the users to convert the Outlook files in the batch with all the attachments embedded in it. It assures safe and secure conversion of the files format as it is capable enough to retain the metadata and RTF formatting of the files intact even after the conversion process.
It supports all the MS Outlook editions and enables users to export the PST files to multiple EML based email clients such as Windows Live Mail, Apple Mail, Windows Mail, etc. A FREE TRIAL EDITION for the same is also available that avails the users to convert 25 PST emails to EML based email clients.