Delete duplicate email items from MBOX files that are in your mailbox. Alternatively, you can launch any email client that supports MBOX files and follow the manual instructions to delete duplicate emails from MBOX files. However, not all users can use the manual technique, and it takes a lot of time. For a top way approach, I recommend using the GainTools MBOX Duplicate Remover Tool to delete duplicate emails from MBOX files without requiring an email client. MBOX files make duplicate data deletion simple. By choosing the file or folder, it is easy to get rid of duplicate emails from MBOX files from the inbox. Additionally, a free trial edition is offered. It works with every version of Windows OS, including 11, 10, 8, 8.1, XP, 7, and Vista. Every MBOX email client has support available. It is simple to use for both technical and non-technical users because of its user interface.