<form class="newsletter" name="newsletterAccueilInscription" method="get" action="{{ urlForm }}">
    <div class="input-group">
        <label class="sr-only" for="mail">{{ 'label.widget.newsletter_mail'|trans }}</label>
        <input type="mail" class="form-control" id="mail" name="mail" placeholder="{{ 'label.widget.placeholder.newsletter_mail'|trans }}" value="">
        <span class="input-group-btn">
        <button class="btn btn-default" type="submit">OK</button>
      </span>
    </div>
</form>