In March, the focus of our work was on finalising 4.3 release as well as the design of EMQ X Broker 5.0. After three weeks of discussions (marathon meetings), we finally compiled a list of requirements for 5.0. This is exciting news, development of 5.0 is about to start.
We have released 4.3-beta.1, 4.3-rc.1, 4.3-rc.2, 4.3-rc.3, 4.3.0 is coming soon, stay tuned.
In March, EMQ open-source team has got in touch with Synopsys Software Integrity Group to seek cooperation so we can provide better security in our products and services.
The message retention function of [EMQ X MQTT Broker](https://emqx.io) is implemented by the `emqx_retainer` plugin, which is enabled by default. By modifying the configuration of the` emqx_retainer` plugin, you can adjust the EMQ X Broker's retention message Location, restrict the number of retained messages and maximum payload length, and adjust the expiration time of retained messages.
HStreamDB is a streaming database designed for streaming data, managing from accessing, storing, processing to distributing large-scale real-time data streams.
[MQTT X](https://mqttx.app) is a cross-platform MQTT 5.0 desktop test client provided by the world's leading open source IoT middleware provider [EMQ](https://emqx.io) , which supports macOS, Linux, Windows. The user interface of **MQTT X** simplifies the operation logic of the page with the pattern of chatting software. Users can quickly create multiple simultaneous-online MQTT clients to test the connection/publish/subscribe functions of MQTT/TCP, MQTT/TLS and other MQTT protocol features.