PST is the file format of MS Outlook which doesn't support any third tool. When it comes to switching from MS Outlook to Thunderbird, MS Outlook to Entourage and MS Outlook to Apple Mail, the manual conversion process is tricky. It may lose data integrity. WholeClear PST to EML program has been introduced for personal and commercial users. The software supports conversion of MS Outlook databases to EML in a safe environment. No MS Outlook files get corrupted or damaged. The utility retains the original structure of PST files. During conversion, the utility doesn't need installation of MS Outlook, but it supports PST files created in MS Outlook 2003, 2007, 2010 and all the above versions. The standalone application has an interactive interface. The conversion process includes three simple steps of migration. No deep technical help is required to configure and install the app. It is a simple application with advanced features. To understand the key functions of the app, download its free version on your Windows operating system. Since the tool is lightweight, it occupies a few MB space on your hard disk. After having satisfaction from a free trial version, apply for the license. WholeClear offers three suitable versions of the app- personal, business and enterprise. The personal version is the cheapest one that can be installed in up to two systems. The business version is for small businesses.