gmail as smtp (one of my last newbie questions)

 
    void Application_Start(object sender, EventArgs e) 
    {
        // Code that runs on application startup
        // Warranty Automation Application
        SqlConnection conGlobal = new SqlConnection
                  (@"Data Source=.\SQLEXPRESS;AttachDbFileName=|DataDirectory|\TRANE.mdf;Integrated Security=True;User Instance=True");

        conGlobal.Open();

        string selService;
        selService = "Select * From ServiceLink WHERE DatetimeSched='" + DateTime.Now.ToShortDateString() + "'";

        SqlCommand globalCom = new SqlCommand(selService, conGlobal);
        
        
        SqlDataReader globalReader = globalCom.ExecuteReader();


        if (globalReader.HasRows)
        {

            SmtpClient client = new SmtpClient();

            client.EnableSsl = true;
            
            client.Send(" There are products that needs servicing. Please view ServiceLiink Record ");