For secure and thorough data conversion, I advise using this WholeClear EML to PST converter. A suitable tool must be used to correctly convert EML items into PST, more so than anything else. The EML to PST Converter Tool is easily available online for download. The most secure and effective way to migrate EML mailbox data into a new PST file that you can put in any location is to use a sophisticated migration application to import EML into Outlook for PST files on Windows. During the conversion of an EML file to a PST format, this utility preserves the original file structure and all metadata.