protected function _applyConfig($config)
    {
        if (is_string($config)) {
            $name = $config;
            $config = static::getConfig($name);
            if (empty($config)) {
                throw new InvalidArgumentException(sprintf('Unknown email configuration "%s".', $name));
            }
            unset($name);
        }

        $this->_profile = array_merge($this->_profile, $config);

        $simpleMethods = [
            'from', 'sender', 'to', 'replyTo', 'readReceipt', 'returnPath',
            'cc', 'bcc', 'messageId', 'domain', 'subject', 'attachments',
            'transport', 'emailFormat', 'emailPattern', 'charset', 'headerCharset'
        ];
        foreach ($simpleMethods as $method) {
            if (isset($config[$method])) {
                $this->{'set' . ucfirst($method)}($config[$method]);
            }
        }

        if (empty($this->headerCharset)) {
            $this->headerCharset = $this->charset;
        }
        if (isset($config['headers'])) {
            $this->setHeaders($config['headers']);
        }

        $viewBuilderMethods = [
            'template', 'layout', 'theme'
        ];
        foreach ($viewBuilderMethods as $method) {
            if (array_key_exists($method, $config)) {
                $this->viewBuilder()->{'set' . ucfirst($method)}($config[$method]);
            }
        }

        if (array_key_exists('helpers', $config)) {
            $this->viewBuilder()->setHelpers($config['helpers'], false);
        }
        if (array_key_exists('viewRender', $config)) {
            $this->viewBuilder()->setClassName($config['viewRender']);
        }
        if (array_key_exists('viewVars', $config)) {
            $this->set($config['viewVars']);
        }
    }