Try VOOK MBOX to PST Converter
for the efficient conversion of the MBOX files without losing a bit of information. It assures the error-free conversion of the MBOX files. MBOX to Outlook Converter supports more than 30 MBOX based email clients such as Thunderbird, Eudora, Mac Mail, etc. and also compatible with all the MS Outlook editions i.e. Outlook 2019, 2016, 2013, etc.
It offers the users to export MBOX data files in batch with all the attachments embedded in it.
It preserves all the email properties(cc, bcc, subject, date, etc.) and RTF formatting of the files intact throughout the conversion process. It does not require the installation of any external utility to perform the conversion of the files as it is an independent utility.
Explore more info at:- http://vooksoftware.com/mbox-to-pst/