The best tool for converting PST to MBOX Format is eSoftTools PST to MBOX Converter Software. There are only a few more steps to take to make this clear. For conversion, both ANSI and UNICODE PST files are accepted. The programme works with both new and old versions of Microsoft Outlook. This programme is easy to use. Anyone can make use of it. This software is user-friendly, both non-technical and technical users can use it without any technical knowledge. All customers have access to a free trial version that allows them to convert up to 25 email items per folder, and technical support is also available.