MailMessage mlmsg = new MailMessage();
                mlmsg.From = new MailAddress(this.txtFrom.Text);
                mlmsg.To.Add(this.txtTo.Text);
                mlmsg.Subject = txtSubject.Text;
                mlmsg.Body = this.richTextMSG.Text;
                SmtpClient Sclt = new SmtpClient(comboBox1.Text, 587);
                Sclt.Credentials = new NetworkCredential(txtFrom.Text, txtMdp.Text);
                Sclt.EnableSsl = true;
                Sclt.Send(mlmsg);