Send Email from Asp.net

protected void btnSubmit_Click(object sender, EventArgs e)
{

try
{

MailMessage message = new MailMessage(txtFrom.Text, txtTo.Text, txtSubject.Text, txtBody.Text);
SmtpClient emailClient = new SmtpClient(txtSMTPServer.Text);
emailClient.Send(message);
litStatus.Text = "Message Sent";

}
catch (Exception ex)
{

litStatus.Text=ex.ToString();

}

}