apt update
apt upgrade 
apt install -reinstall ubuntu-desktop 
shutdown -r now 

 $parametros = array(
                "fecha" => $datos['fecha'],
                "nombreFecha" => $datos['nombreFecha'],
                "dato1" => $datos['dato1'][0],
                "dato2" => $datos['dato2'][0],
                "dato2Aux" => $datos['dato2'][1]);

 
  if (!isset($datos['dato2Aux'][1])) {
                $datos['dato2Aux'][1] = 1;
            }
$parametros = array(
                "fecha" => $datos['fecha'],
                "nombreFecha" => $datos['nombreFecha'],
                "dato1" => $datos['dato1'][0],
                "dato2" => $datos['dato2'][0],
                "dato2Aux" => $datos['dato2'][1]);

$mail = new PHPMailer\PHPMailer\PHPMailer;
$mail->isSMTP();
$mail->SMTPDebug = 3; //para ver los errores del lado del cliente y servidor 
$mail->Debugoutput = 'html'; 
$mail->Host = 'dominio.com'; //servidor saliente stmp 
$mail->Port = 465; //puerto 465 para ssl 
$mail->SMTPSecure = "ssl"; 
$mail->SMTPAuth = true; //requiere auth
$mail->Username = "[email protected]";
$mail->Password = "pass123";
$mail->setFrom('[email protected]', 'dominio'); //desde: 
$mail->addReplyTo('[email protected]', 'dominio'); //responder a : 
$mail->addAddress(&destino, ''); //para : 
$mail->Subject = 'test';// asunto
$mail->Body = $cuerpo; //cuerpo
$mail->AltBody = 'This is a plain-text message body'; //cuerpo alternativo en texto plano 
$mail->SMTPOptions = array(  //necesario sino me larga error 
    'ssl' => array(
        'verify_peer' => false,
        'verify_peer_name' => false,
        'allow_self_signed' => true
    )
);
if (!$mail->send()) {  //envio el email 
    echo "Mailer Error: " . $mail->ErrorInfo; //catch de error 
} else {
    echo "Mensaje enviado!"; // respuesta si se envia 
}

try{
$mail = new PHPMailer\PHPMailer\PHPMailer();

//Enable SMTP debugging.
$mail->SMTPDebug = 3;
//Set PHPMailer to use SMTP.
$mail->isSMTP();
//Set SMTP host name
$mail->Host = "mail.dominio.com";

//Set this to true if SMTP host requires authentication to send email
$mail->SMTPAuth = true;
//Provide username and password
$mail->Username = "[email protected]";
$mail->Password = "pass123";
//If SMTP requires TLS encryption then set it
$mail->SMTPSecure = "tls";
//Set TCP port to connect to
$mail->Port = 587;

$mail->From = "[email protected]";
$mail->FromName = "NAME";
$mail->AddReplyTo('[email protected]','NAME');


$mail->addAddress("[email protected]","Recepient Name");


$mail->isHTML(true);

$mail->Subject = "Subject Text";
$mail->Body = "TEST BODY";
//si no agrego estas opciones resulta en error "SMTP Error: Could not connect to SMTP host"
$mail->SMTPOptions = array(
    'ssl' => array(
        'verify_peer' => false,
        'verify_peer_name' => false,
        'allow_self_signed' => true
    )
);
if(!$mail->send())
{
echo "Mailer Error: " . $mail->ErrorInfo;
}
else
{
echo "Message has been sent successfully";
}
}
catch(\PHPMailer\PHPMailer\Exception $e){
    echo 'ERROR' . $e->errorMessage();
}