This program is a SMTP_Client example running on MDK Middleware Network.
It shows you how to send emails from an embedded application.

To test this example, connect the evaluation board to a LAN with router.
The example will configure the network parameters automatically.

Note:
In order to make the example work, you need to modify SMTP_Client.c:
- Modify Email information content in the SMTP Email Descriptor structure (NET_SMTP_MAIL mail):
  - Email addresses: From, To, Cc, Bcc
  - Subject and the message (body) of the Email
  - Optional attachments and encoding type

- Modify information about SMTP Server and user credentials in SMTP
  Mail Transfer Agent Descriptor structure (NET_SMTP_MTA server):
  - Server name/IP
  - Sever port
  - User name and password
  - Optional NET_SMTP_MTA_USETLS flag in case of secure variant.
    (https://www.keil.com/pack/doc/mw/Network/html/use_secure_components.html#smtps_client)

The SMTP_Client program is a standalone application preconfigured for
NXP MIMXRT1060-EVKC Evaluation Board.

The program is available in different targets:
 - Debug:
   - Code:                      External QSPI Flash NOR
   - RW:                        Internal RAM
   - Debugger:                  CMSIS-DAP
   - Compiler:                  ARM Compiler optimization Level 1
   - Compiler:Event Recorder:   Enabled
   - CMSIS:RTOS2:Keil RTX5:     Source
   - Network:CORE:              IPv4/IPv6 Debug
 - Release:
   - Code:                      External QSPI Flash NOR
   - RW:                        Internal RAM
   - Debugger:                  CMSIS-DAP
   - Compiler:                  ARM Compiler optimization Level 3
   - Compiler:Event Recorder:   Disabled
   - CMSIS:RTOS2:Keil RTX5:     Library
   - Network:CORE:              IPv4/IPv6 Release

Notes:
 - In case of debugging problems consult the documentation and Blinky example
 - Power the board with external power through J45 barrel connector with 
   stable 5V voltage (center +), jumper J40 short 1-2, switch SW6 position 2-3
 - Define ETH_PHY_REF_CLK_50M=1 must be set to build KSZ8081RNA
   Ethernet PHY driver with support for 50MHz reference clock.
 - LCD output is re-targeted to debug console (virtual COM port) accessible on the
   same J53 connector as CMSIS-DAP debugger.
