If you're looking to convert MBOX files to PST, consider using the PST file format with the ToolsBaer MBOX to PST Converter Tool. This application efficiently converts multiple MBOX files to PST, supporting email clients like Apple Mail, Thunderbird, Entourage, Eudora, Poco Mail, Opera Mail, and Sea Monkey. You can explore the demo version of the tool for a trial run, and it's compatible with various Windows OS versions including Windows 11, 10, 8.1, 8, 7, XP, and Vista.

To securely convert your OST file to EML format, consider using third-party software such as ToolsBaer for OST to EML Conversion Software. This utility allows for easy conversion of your OST file to EML format through a simple process, without the need for technical expertise. The program is compatible with all MS Windows editions, making it suitable for use on any computer system. For further insight into its features, a free demo version is available for download.