*
     * @param form the mail form containing notification settings
     * @return HTML response after sending test mail
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse sendmail(final MailForm form) {
        validate(form, messages -> {}, () -> asHtml(path_AdminGeneral_AdminGeneralJsp));

        final String[] toAddresses = form.notificationTo.split(",");

                                                <button type="submit" class="btn btn-default ${f:h(editableClass)}"
                                                        name="sendmail" value="test">
                                                    <la:message key="labels.send_testmail"/>
                                                </button>
                                            </div>