final String toStrs = fessConfig.getNotificationTo();
                final String[] toAddresses;
                if (StringUtil.isNotBlank(toStrs)) {
                    toAddresses = toStrs.split(",");
                } else {
                    toAddresses = StringUtil.EMPTY_STRINGS;
                }
                final Postbox postbox = ComponentUtil.getComponent(Postbox.class);

            final Postbox postbox = ComponentUtil.getComponent(Postbox.class);
            try {
                final String[] toAddresses;
                if (StringUtil.isNotBlank(toStrs)) {
                    toAddresses = toStrs.split(",");
                } else {
                    toAddresses = StringUtil.EMPTY_STRINGS;
                }

     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse sendmail(final MailForm form) {
        validate(form, messages -> {}, () -> asHtml(path_AdminGeneral_AdminGeneralJsp));

        final String[] toAddresses = form.notificationTo.split(",");
        final Map<String, Object> dataMap = new HashMap<>();
        dataMap.put("hostname", systemHelper.getHostname());