protected function isKnownFeed()
    {
        if (empty(config("{$this->configBase}.feeds.{$this->feedName}"))) {
            $this->warningCount++;
            Log::warning(
                "The feed referred as '{$this->feedName}' is not configured in the collector " .
                config("{$this->configBase}.collector.name") .
                ' therefore skipping processing of this e-mail'
            );
            return false;
        } else {
            return true;
        }
    }