4.3.2 Email Client Functionality
As soon as the firmware gets a valid IP address using DHCP, an email is sent. Email receipt,
subject, and content are defined at file dhcp_app.c. Email origin, password, authentication
flag, and SMTP server are defined at file constants.c.
The following figure shows a received email sent by the system.
Figure 4-6. Email sent by the MCF51CN128 reference design
The following email client implementation does not deal with encryption. Almost all the
actual SMTP servers use secure socket layer (SSL) to correctly sign-in and exchange
information over a secure communication protocol. Popular email service providers like
Hotmail, Yahoo, or Google accept SSL. File attachments to emails need to be considered
in the future.
At the time of testing this software, the following SMTP server is the only one that accepts
regular requests without SSL:
smtp113.plus.mail.mud.yahoo.com
The username and password used with the Yahoo email account are stored at constants.c
and might not be valid during testing.
TCP/IP Applications Using the MCF51CN Family—Designer Reference Manual, Rev. 0, 12/2009
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Freescale Semiconductor
Chapter 4 System Setup
