This document provides links to information about Multipurpose Internet Mail Extensions (MIME). MIME extends the format of Internet mail to allow non-US-ASCII textual messages, non ...

Multipurpose Internet Mail Extensions (MIME) is an Internet standard that extends the format of e-mail to support: Text in character sets other than ASCII

file extension?, Windows Vista Mail, Windows Vista Email, Mail Issues and Technical Support..

RFC 2045: RFC 822 defines a message representation protocol specifying considerable detail about US-ASCII message headers, and leaves the message content, or message body, as flat ...

(messaging, standard) Secure Multipurpose Internet Mail Extensions - (S-MIME) A specification for secure electronic mail. S-MIME was designed to add security to e-mail messages in ...

S/MIME - S/MIME is an acronym that stands for Secure Multipurpose Internet Mail Extensions, and this is a standard that is used for signing email and public key encryption of email ...

RFC 3850 - Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Certificate Handling

File extension used by mail applications and mail clients to storage e-mail messages and other data related to internet mail communication

Look at the XUL and JS from Mozilla Mail that are used to implement this menu item. An extension for adding Yahoo mail support or maybe hotmail?

RFC 1521 - MIME (Multipurpose Internet Mail Extensions) Part One: Mechanisms for Specifying and Describing the Format of Internet Message Bodies