SMailCallbackContext.setPreparedMessageHookOnThread(notificationHelper::send);
                CrawlerPostcard.droppedInto(postbox, postcard -> {
                    postcard.setFrom(fessConfig.getMailFromAddress(), fessConfig.getMailFromName());
                    postcard.addReplyTo(fessConfig.getMailReturnPath());
                    if (toAddresses.length > 0) {

        final Postbox postbox = ComponentUtil.getComponent(Postbox.class);
        try {
            TestmailPostcard.droppedInto(postbox, postcard -> {
                postcard.setFrom(fessConfig.getMailFromAddress(), fessConfig.getMailFromName());
                postcard.addReplyTo(fessConfig.getMailReturnPath());
                stream(toAddresses).of(stream -> stream.forEach(address -> {
                    postcard.addTo(address);

            }

            @Override
            public String getNotificationTo() {
                return "******@****.***";
            }

            @Override
            public String getMailFromAddress() {
                return "******@****.***";
            }

            @Override
            public String getMailFromName() {
                return "Fess Crawler";
            }

        }

        @Override
        public String getNotificationTo() {
            return "******@****.***,******@****.***";
        }

        @Override
        public String getMailFromAddress() {
            return "******@****.***";
        }

        @Override
        public String getMailFromName() {
            return "Fess System";
        }

        @Override