TrustVare OST to EML Converter is a simple software that lets users convert OST files to EML files without losing any data. During conversion, the tool keeps email properties like To, From, Subject, Date, and Attachments, as well as the folder layout. You can convert one or more OST files at the same time, and you don't even need to run Outlook. It works well on all versions of Windows OS and is great for users who want to open Outlook emails in Thunderbird, Windows Live Mail, and other email clients that accept EML. You can also try a free test version before you buy it.