Sending Mail

 protected void ButtonSend_Click(object sender, EventArgs e)
    {
        try
        {
            MailMessage msg = new MailMessage();
            msg.From = new MailAddress("myemail@gmail.com", "Email");
            msg.To.Add("myemail@gmail.com");
            msg.Priority = MailPriority.High;
            msg.Subject="Hello";
            msg.Body=TextBody.Text.Trim();
            msg.IsBodyHtml = true;
            NetworkCredential loginInfo = new NetworkCredential("myemail@gmail.com", "Passward");


            SmtpClient client = new SmtpClient();
            client.Host = "smtp.gmail.com";
           // client.Host = "smtp.google.com";
            //client.Port = 578;
            client.Port = 465;
          
            client.EnableSsl = true;
            //client.UseDefaultCredentials = false;
            client.Credentials = loginInfo;
            client.DeliveryMethod = SmtpDeliveryMethod.Network;
            client.Send(msg);
            LabelErr.Text = "Mail Sent.";
        }
        catch (Exception ex)
        {
            LabelErr.Text = ex.Message;
        }
    }