if err != nil {
			return nil, err
		}

		reconnectIntervalEnv := target.EnvMQTTReconnectInterval
		if k != config.Default {
			reconnectIntervalEnv = reconnectIntervalEnv + config.Default + k
		}
		reconnectInterval, err := time.ParseDuration(env.Get(reconnectIntervalEnv,
			kv.Get(target.MqttReconnectInterval)))
		if err != nil {
			return nil, err
		}

		keepAliveIntervalEnv := target.EnvMQTTKeepAliveInterval