To simple way to export OST emails to EML in bulk conversion then try the FixVare OST to PST Converter Software, which easily exports a bulk size of OST files into PST format without any technical issues. The software exports multiple or single OST data like emails, contacts, notes, calendar, tasks, attachments, and journals. That application exports without Outlook and Exchange connectivity. The utility is compatible with all Outlook versions.
More Information https://www.fixvare.com/products/ost/eml/
More Information https://www.fixvare.com/products/ost/eml/