How e-mail Message Formats Affect Internet e-mail Messages in Outlook
Click here to download now
Overview: Microsoft Outlook and the Microsoft Exchange Client sometimes use a special method to package information for sending messages across the Internet. This method is technically referred to as Transport Neutral Encapsulation Format (TNEF). The use of TNEF is commonly affected by settings in Outlook that are referred to as Microsoft Outlook Rich Text Format (RTF). Rich Text Format and TNEF are not exactly the same, but they are closely related. A TNEF-encoded message contains a plain text version of the message, and a binary attachment that packages various other parts of the original message.

