Converting MBOX files manually can be challenging, as these files are not directly accessible in standard email clients like Outlook or Windows Mail. One way to open an MBOX file is by using Mozilla Thunderbird. After that, you must manually import the MBOX file, which can be time-consuming and may not always work correctly if the file is corrupted. Another method is using a text editor, but this makes reading emails difficult due to the unstructured format. The biggest challenges with the manual process include file corruption risks, lack of advanced search options, and incompatibility with certain email clients. 

To overcome these limitations, the MCD MBOX File Viewer Tool provides a seamless way to open and read MBOX files without requiring an email client. It allows users to preview emails, attachments, and metadata in a structured format. The tool supports large MBOX files and ensures a smooth user experience with an intuitive interface. Additionally, it eliminates the risk of data loss and offers advanced search and filtering options for efficient email management. If you are looking for a hassle-free way to view MBOX files, this tool is an excellent solution.