ToolsGround MBOX to PST Converter Tool is without using Microsoft Outlook, it converts MBOX files to PST files. MBOX files are used to build PST files with multiple attachments. After converting the MBOX file to a PST file type, open each piece of data in Microsoft Outlook. The interface of this application is easy to use. It provides a free demo version. Every version of MS Outlook is supported. Several email clients are supported like Thunderbird, Apple Mail, PocoMail, SeaMonkey, GNU, etc..