The best method depends on mailbox size and how much data needs to be exported. For a few emails, manual drag-and-drop may work in some cases, but it is not suitable for large PST files or complete mailbox conversion. Manual export can also create formatting issues and may not preserve attachments properly.

For Windows users, Softaken PST to EML Converter is a practical solution. It is designed to convert Outlook PST emails into EML format with attachments and metadata. The software supports selective conversion, which means only required folders or emails can be exported instead of converting the full PST file. It also includes a preview option and search feature to locate specific PST items before export. This makes PST to EML conversion cleaner and faster.