The Email Server Settings option provides the ability to configure the mail server to send emails. From this dialog box, you can specify an address for the server, the port number and other settings that are specific to the server. You can also require that emails are routed with an SSL encrypted connection.
The SmtpClient class for routing emails using SSL encryption only supports the SMTP Service Extension for secure SMTP over Transport Layer Security as defined in RFC 3207, which is published by the Internet Engineering Task Force (IETF). In this mode, the SMTP session begins on an unencrypted channel, then a STARTTLS command is issued by the client to the server to switch to secure communication using SSL.
To configure email server settings: