It doesn't serve a fancy HTML dashboard by default (though you can build one). Instead, it serves (similar to CSV or key-value pairs) perfect for scripts, Prometheus exporters, or Nagios checks. How to Enable and Test It First, ensure your configuration has this block:
Many admins disable or overlook this port, thinking it’s just for a “nice-to-have” web interface. In reality, the PowerMTA HTTP monitoring endpoint (default port 8080) is your best friend for real-time observability. powermta monitoring 8080
Let’s break down how to use it, what metrics matter, and how to set up proactive alerts. PowerMTA includes a built-in web server that exposes metrics via HTTP. When you see http-listener :8080 in your pmta/config file, you are looking at a live data stream of your MTA’s internal state. It doesn't serve a fancy HTML dashboard by