What is an EMAIL file? An EMAIL file is an email message created with Microsoft Outlook Express, an email and news client bundled with Internet Explorer 4.0 to 6.0. It contains a message but may also store an email attachment, which is a file sent with the message.

More Information You will most likely not come across an EMAIL file since the program (Microsoft Outlook Express) that uses the file has been discontinued. Also, EMAIL files are an an obscure alternative to the much more common .EML file. However, if you find the EML file and need to open it, you can use Microsoft Outlook Express. If you cannot find a copy of Outlook Express you can use a text editor to view the parts of the EML file that are stored in text.