In any case when user need to Convert Thunderbird EML to Outlook, it becomes quite essential to know how to move Thunderbird EML to Outlook or Import Thunderbird EML files to Outlook. Here comes the question, how to Convert Thunderbird EML to Outlook without harming original email formatting. Since Thunderbird saves its email in mbox format, so you need to drag & drop Thunderbird Files into a separate folder which contains the files in EML format. After that you can convert Thunderbird EML to Outlook by choosing simple steps of Birdie EML to PST Converter.