[SOLVED] Could not connect to SMTP host.

use PHPMailer\PHPMailer\PHPMailer;
require_once 'vendor/autoload.php';

  $mail = new PHPMailer();  // Create new PHPMailer

    $mail->isHTML(true);
    $mail->Encoding = 'base64';
    $mail->CharSet = 'UTF-8';
    $mail->IsSMTP(); // enable SMTP
    $mail->SMTPDebug = 1;  // debug: 1 = errors and message, 2 = message only
    $mail->SMTPAuth = true;  // Enable SMTP authenticate
    $mail->Username = "test@email.fr"; // SMTP username
    $mail->Password = "password";
    $mail->SMTPSecure = 'PHPMailer::ENCRYPTION_STARTTLS';
    $mail->Host = "pro2.mail.ovh.net";
    $mail->Port = 587;
    $mail->SetFrom("test@email", "test@email");
    $mail->Subject = 'Test Email';
    $mail->Body = "Hi !";
    $mail->AddAddress("tested@email.fr");
   $mail->Send();