How to Fix "No Valid MBOX files were found"?

To fix the “No Valid MBOX files were found” issue manually, make sure the file has a .mbox extension and is not damaged. Open the file in a supported email client, such as, Apple Mail, Thunderbird, or Eudora to verify it is not malformed (open with Tunderbird without Maildir extensions if possible). Lastly, You can re-export the mailbox as an MBOX file if necessary.

Despite manual methods, there are disadvantages including the possibility of file corruption, time consumption, limited support for large MBOX files, and no guarantee that all your data has been recovered.

If the manual checks do not resolve your error, then, the best method for success is to utilize a professional tool. The MacSonik MBOX Conversion Tool avoids the typical read errors, and will properly import your MBOX files, which in many situations do not work for general applications. The main advantage of using this desktop is each conversion will be efficient, effective and very secure all within a reasonable time frame and with little fuss. In addition, the user interface is clear and straight forward for all user types, and has many offered formats and clients and smart filter options.

Instructions to Resolve No Valid MBOX File Found Error
1. First, download and open the MacSonik MBOX Conversion Software, and proceed to click Next.
2. Second, select your MBOX files from the Mac system, and upload those files, then select Open. Click Next.
3. Third, review your files in tree structure and select to export them (which you can do from Select All). Then click Next.
4. Fourth, select your preference of format/client for the data movement; say, for example, for, Office 365.
5. Finally, apply the relevant filters and then click Convert to secure and access your data.
 
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