Download this updated C++ document and code example to learn how to create Message Type Modules (MTMs) for S60 3rd Edition and later releases. The target audience is e-mail developers implementing their own e-mail protocol (for example, Push e-mail service), where preinstalled S60 platform e-mail MTMs (POP3, IMAP4) cannot be used. The package demonstrates how to develop and install an MTM, how to create an account (mailbox), how to create a simple viewer/editor implemented as a server application, how to provide support to send from other applications, and how to receive notifications of new messages. Message sending and receiving are echoed locally. Note that Symbian platform security imposes heavy capability requirements for MTMs (up to ALL-TCB capabilities) and thus the application has to be signed using the Manufacturer Approved Developer Certificate. In the updated version, information on attachment handling has been added to the document.