SMTP Connection health check
  1. Checks if the value of the UseCDONTS record (Parm_Name column in the Custom_SysParams database table) is set to N.
  2. Verifies that the value of the SmtpServer record (Parm_Name column in the Custom_SysParams database table) is not blank.
  3. Attempts to connect to the SMTP server using
    • SMTP server specified in the SmtpServer record (Parm_Name column in the Custom_SysParams database table).
    • Port specified in the SMTPPort record (Parm_Name column in the Custom_SysParams database table).
  4. If a connection is established, sends an EHLO command to the SMTP server and waits for reply code 250.