doing a text with phpmailer it all works:
date_default_timezone_set('Etc/UTC');
require '../PHPMailerAutoload.php';
$mail = new PHPMailer;
$mail->isSMTP();
//Enable SMTP debugging
// 0 = off (for production use)
// 1 = client messages
// 2 = client and server messages
$mail->SMTPDebug = 2;
$mail->Debugoutput = 'html';
$mail->Host = "ex.mail.ovh.net";
$mail->Port = 587;
$mail->SMTPSecure = 'tls';
$mail->SMTPAuth = true;
$mail->Username = "info@xxxxxxx.com";
$mail->Password = "yyyyyy";
$mail->setFrom('info@xxxxxxx.com', 'test');
$mail->addReplyTo('info@aaaaaaa.com', 'reply');
$mail->addAddress('test@wwwww.com', 'XX YYY');
$mail->Subject = 'PHPMailer SMTP test';
$mail->AltBody = 'This is a plain-text message body';
if (!$mail->send()) {
echo "Mailer Error: " . $mail->ErrorInfo;
} else {
echo "Message sent!";
}