EML files are essentially emails in file form. The easiest way to open them is to use an email client such as Outlook, Outlook Express, Windows Live Mail, or Thunderbird. For most newer versions of these programs, EML files should be automatically registered so that double-clicking the file opens it.How do you open a file in outlook?
Open an Outlook data file. On the File menu, click Open > Outlook Data File. Select the Outlook Data file you want to open, and select Open. Important: If you can't find your .pst file, it may be hidden and you need to display the file location.What are the different types of Outlook files?
The primary differences between the two types of Outlook data files are as follows: Outlook Data Files (.pst) are used for POP3, IMAP, and web-based mail accounts. Offline Outlook Data Files (.ost) are used when you have an Exchange account and want to work offline or use or use the default Cached Exchange Mode.