In my opinion, you can delete duplicate emails from MBOX files without losing important files, then try the TrustVare MBOX Duplicate Remover tool, I'm also using it so I can suggest you. The software quickly scans MBOX files, finds duplicate items and deletes them within a few clicks. It will handle a large number of duplicate MBOX files without downloading any other application. The software is the best for non-technical users becouse it has user-frinedly interface and users easily understand the removal process. It will work on all Windows OS versions like 11, 10, 8.1, 8, and 7.

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