By all means, use email, but why not use MQTT? I have 3 or 4 small self-hosted home servers, and I set up simple mosquitto_pub bash scripts to relay server mess

By all means, use email, but why not use MQTT? I have 3 or 4 small self-hosted home servers, and I set up simple mosquitto_pub bash scripts to relay server messages. The main advantages that I see are speed, low resource usage and the ability of multiple people to subscribe to the message topic concurrently. It also means you don't need an email client; if need be a simple mosquitto_sub is enough.