Are you trying to find the best solution to combine multiple MBOX mailboxes in single file online? So, utilize the CubexSoft MBOX Merger tool that runs on all the Windows OS editions. There is no need to install the Adobe Acrobat Reader software to merge MBOX files to single file without losing attachments. You can add the MBOX files by using its dual options i.e. Select File(s) or Select Folder(s) and save the resultant file in the desired location path. It is compatible with all the Win OS versions i.e. Win 8, 10, 11, Vista, XP, etc. This tool enables all users to combine MBOX files manages all email headers i.e. to, cc, time-stamps, dates, receive, bcc, etc. in the perfect manner during the merging two or more MBOX files.