MBOX to PST converter freeware software provided by Data Recovery Freeware is the professional tool to convert MBOX data files. It helps users, who are looking for an easy method to convert their MBOX data files with ease. Also, Software allows converting multiple MBOX files into a single PST file. It allows the users to import MBOX files to Outlook, or in any other format like EML, HTML, etc easily. In the latest release, a lot of changes happened for making the product the best.
Source: http://www.datarecoveryfreeware.org/mbox-to-pst-converter/