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Configuring vSphere Alarms and Email Notifications: Automated SysAdmin Alerts When ESXi CPU, RAM, and Datastore Exceed Thresholds

A comparison of three ESXi monitoring approaches (native alarms, Zabbix, PowerCLI) and a practical walkthrough for deploying vSphere Alarms to automatically email SysAdmins when CPU, RAM, or Datastore usage hits dangerous thresholds. Step-by-step from SMTP configuration to fine-tuning thresholds to avoid alert fatigue.