If you have lots of EML files that need to be converted to MBOX format, TrustVare EML to MBOX Converter Software can be very efficient. This tool helps easily convert your EML file into MBOX format for working well with mail clients such as Thunderbird. First, you have to load all the EML files into the software and then save them into MBOX format. This process can be used both on Windows and Outlook, making it possible to convert with no hassle.