SENDING EMAIL USING ASP.NET

 protected void Button1_Click(object sender, EventArgs e)
    {
        try
        {
            MailMessage msg = new MailMessage();

            msg.From = new MailAddress("fromaddress@gmail.com");

            msg.To.Add(Totestbox.Text);

            msg.Subject = subtextbox.Text;

            msg.IsBodyHtml = true;

            msg.Body = bodytextbox.Text;

            msg.Priority = MailPriority.High;

            SmtpClient client = new SmtpClient("smtp.gmail.com", 587);

            client.UseDefaultCredentials = false;

            client.Credentials = new System.Net.NetworkCredential("fromaddress@gmail.com", "password");

            client.Port = 587;

            client.Host = "smtp.gmail.com";

            client.EnableSsl = true;

            client.Send(msg);
            Label1.Text = "mail sent";
        }
        catch (Exception ex)
        {
            Label1.Text ="mail not sent" + ex.Message ;
        }

    }