Graylog | Creating Email Notification Alerts with Hostname Variables in the Subject Line
Graylog is a powerful open-source platform capable of receiving and processing syslog messages from a wide variety of sources, including routers, switches, firewalls, Windows servers, and many other devices. Like many open-source solutions, Graylog has certain limitations, particularly regarding documentation. Some sections of the official documentation can be challenging for less experienced users or for those who are not yet familiar with Graylog's internal concepts and templating capabilities. While working on configuring email alerts in Graylog, I wanted to send email notifications whenever specific events or conditions were detected. However, I quickly discovered that the default email notification template offers limited customization options and does not provide the desired level of flexibility. My goal was to include dynamic variables in the email subject line so that useful information, such as the device name that generated the event, could be displayed directly in the em...