let apariencia2 = SCLAlertView.SCLAppearance(
                showCloseButton: false
            )
            alertView = SCLAlertView(appearance: apariencia2).showWait("Espere", subTitle: "Enviando Correo...")

            // Move to a background thread to do some long running work
            DispatchQueue.global(qos: .userInitiated).async {

                let smtpSession = MCOSMTPSession()
                smtpSession.hostname = "smtp.gmail.com"
                smtpSession.username = "unimo2016@gmail.com"
                smtpSession.password = "Emo100510ew5"
                smtpSession.port = 465
                smtpSession.authType = MCOAuthType.saslPlain
                smtpSession.connectionType = MCOConnectionType.TLS
                smtpSession.connectionLogger = {(connectionID, type, data) in
                    if data != nil {
                        if let string = NSString(data: data!, encoding: String.Encoding.utf8.rawValue){
                            NSLog("Connectionlogger: \(string)")
                        }
                    }
                }

                let builder = MCOMessageBuilder()
                builder.header.to = [MCOAddress(displayName: self.textoNombre.text!, mailbox: "info@modelo.edu.mx")]
                builder.header.from = MCOAddress(displayName: "Escuela Modelo", mailbox: self.textoCorreo.text!)
                builder.header.subject = self.textoAsunto.text!
                builder.htmlBody = "Nombre: " + self.textoNombre.text! + "\n" + "Correo: " + self.textoCorreo.text! + "\n" + "Teléfono: " + self.textoTelefono.text! + "\n" + "Mensaje: " + self.textoMensaje.text!

                let rfc822Data = builder.data()
                let sendOperation = smtpSession.sendOperation(with: rfc822Data)
                sendOperation?.start { (error) -> Void in
                    DispatchQueue.main.async {

                        if (error != nil) {
                            //DETIENE EL TIEMPO DE ESPERA
                            self.alertView?.close()
                            //MENSAJE
                            let alerta = UIAlertController(title: "Error",
                                                           message: "Falló el envío de tu mensaje",
                                                           preferredStyle: UIAlertControllerStyle.alert)
                            let accion = UIAlertAction(title: "Cerrar",
                                                       style: UIAlertActionStyle.default) { _ in
                                                        alerta.dismiss(animated: true, completion: nil) }
                            alerta.addAction(accion)
                            self.present(alerta, animated: true, completion: nil)
                            //JLToast.makeText(NSLocalizedString("Falló el envío de tu mensaje",comment:"Datos Actualizados"), duration: 1).show()
                            NSLog("Error al mandar mensaje: \(String(describing: error))")
                        } else {
                            //DETIENE EL TIEMPO DE ESPERA
                            self.alertView?.close()
                            //MENSAJE
                            let alerta = UIAlertController(title: "",
                                                           message: "Tu Mensaje se ha enviado",
                                                           preferredStyle: UIAlertControllerStyle.alert)
                            let accion = UIAlertAction(title: "Cerrar",
                                                       style: UIAlertActionStyle.default) {
                                                        _ in
                                                        self.borrarCampos()
                                                        self.view.endEditing(true)

                            }
                            alerta.addAction(accion)
                            self.present(alerta, animated: true, completion: nil)

                            //JLToast.makeText(NSLocalizedString("Tu correo se ha enviado",comment:"Datos Actualizados"), duration: 1).show()
                            NSLog("Mensaje enviado")
                        }
                    }

                }
                //dispatch
            }