// Pour serveur local (Option 1)
$mail->isSMTP();
$mail->Host = 'localhost'; // ou '127.0.0.1'
$mail->SMTPAuth = true;
$mail->Username = 'user@vmi2854090.contaboserver.net';
$mail->Password = 'votre_mot_de_passe';
$mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS;
$mail->Port = 587;

// OU pour service externe (Option 2 - exemple SendGrid)
$mail->isSMTP();
$mail->Host = 'smtp.sendgrid.net';
$mail->SMTPAuth = true;
$mail->Username = 'apikey';
$mail->Password = 'votre_cle_api';
$mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS;
$mail->Port = 587;