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.