CubexSoft MBOX Merger is a useful conversion tool that can combine multiple MBOX files into a single MBOX.
The simple GUI is easy to navigate, which is advantageous as you don't need any special training for using the app.
CubexSoft MBOX Merger lets you easily combine MBOX files into single MBOX. The process maintains all the email's Meta attributes, formatting, attachments and folder structure precisely, and you also get the option to delete any duplicate email items as well, which is needless to say, very helpful!
This demo will merge first 20 emails from each MBOX mailbox. For merging unlimited MBOX files in single process, you need to purchase the licensed edition of MBOX Merger.
If you need to combine multiple MBOX files into a single MBOX and don't need much more than a basic set of tools, CubexSoft MBOX Merger might be worth checking out?