The Simple Mail Transfer Protocol (SMTP) is used for email transmission. HCC’s SMTP client module comprises a single task that handles communication with an SMTP server. It can handle multiple connections simultaneously and the number of simultaneous connections is configurable.
The SMTP client module is part of HCC’s MISRA-compliant TCP/IP stack, as shown in the Networking Overview diagram, and is designed specifically for use with it.
Extended Simple Mail Transfer Protocol (ESMTP) is available as a product bundle consisting of SMTP and TLS.