no, me malinterpretaste
debera queder asi
Código:
private void btnSend_Click(object sender, EventArgs e)
{
MailMessage mail = new MailMessage();
mail.Subject = txtSubject.Text;
mail.Body = txtMessage.Text;
mail.To.Add(new MailAddress("[email protected]"));
mail.From = txtFrom.Text;
SmtpMail etcc..
}
esa es la linea que cambia