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RL-ARM User's Guide
RL-RTX RL-FlashFS 
RL-TCPnet TCP Socket 
Opening TCP Connection TCP Active Open TCP Passive Open Sending TCP Data Example for Sending Data Multiple TCP Connections UDP Socket Opening UDP Connection Sending UDP Data When DHCP Enabled When ARP Cache Empty Example for Sending Data IP Multicasting Multiple UDP Connections Configuring TCPnet Static Configuration 
System Definitions Ethernet Network Interface PPP Network Interface SLIP Interface UDP Socket TCP Socket BSD Socket HTTP Server Telnet Server TFTP Server FTP Server DNS Client SMTP Client SNMP Agent Runtime Configuration Library Files Using RL-TCPnet Stand Alone With RTX Kernel 
Applications HTTP Web Server Script Language CGI Functions Ajax Support Using XML XML Example How it works SOAP Support SOAP Interface Large POST Messages Web Pages Default Page Error Pages Web on SD Card Web Update File System Interface Http Caching How it works Internal Web External Web Using RAM File System FCARM File Converter PRINT Directive NOPRINT Directive PAGEWIDTH Directive PAGELENGTH Directive ROOT Directive Telnet Server Command Line Interface Sending Reply Message Short Reply Long Reply Continuous Screen Update TFTP Server File System Interface FTP Server File System Interface Supported Commands SMTP Client SNMP Agent MIB Database MIB Interface MIB Entry MIB Table DNS Resolver Starting DNS Device Drivers Ethernet Driver Interrupt Mode Modem Driver Serial Driver Using Serial Link Cable Connection Modem Connection Windows Dial-up Add Direct Serial Link New Dial-up Connection Configure PPP Dial-up Configure SLIP Dial-up Debugging Enabling Debug Debug Level Redirecting Output Function Overview BSD Routines CGI Routines Ethernet Routines Error Function FTP Routines HTTP Routines IGMP Routines Miscellaneous Routines Modem Routines PPP Routines Serial Routines SLIP Routines SMTP Routines SNMP Routines System Functions TCP Routines Telnet Routines TFTP Routines UDP Routines 
RL-CAN RL-USB Example Programs Library Reference AppendixSMTP Client
Simple Mail Transfer Protocol (SMTP) is a widely used protocol for the delivery of e-mails between TCP/IP systems and users. All steps in the e-mail system use SMTP with the exception of the final retrieval step by an e-mail recipient.
An Embedded SMTP Client can send e-mails to various recipients. A typical use is to send automated e-mail notifications to different e-mail addresses.
E-mail content can be a static predefined e-mail message or a real dynamic message. An example of a real dynamic email is one that contains the measurement results from a log file or an email with current measurement values.
SMTP Client interface functions are in the user interface module SMTP_uif.c, which is in the \Keil\ARM\RL\TCPnet\User folder. You must copy it to your project directory and add it to your project. Customize this module by changing the From address, the To address, and the body of the email message.
The following function is in the module:
- smtp_cbfunc() - callback function to compose the e-mail.
- smtp_accept_auth() - callback function to accept/deny the authentication advertised by SMTP Server.
The following function is in the RL-TCPnet library:
- smtp_connect() - connect to SMTP Server and send an e-mail.
- In order to use an Embedded SMTP Client, you must enable and configure it in the configuration file.
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