1 Overview

This package provides OpenMetrics support for mailfromd, a powerful mail filtering utility designed for use with mail transport agents supporting the milter protocol (see Mailfromd in Mailfromd Manual).

OpenMetrics is a plaintext protocol for representing telemetry data, which was originally introduced by prometheus systems monitoring and alerting toolkit. It is formally described in https://openmetrics.io/.

The mfmod_openmetrics module provides MFL functions for declaring and manipulating metric sets from mailfromd filter source file and installs an HTTP server for answering the metric queries.