# Global Alertmanager runtime and SMTP settings.
global:
  resolve_timeout: 5m # Wait time before an alert is considered resolved when no further updates are received.
  smtp_from: alert@openim.io # Sender address displayed in alert emails.
  smtp_smarthost: smtp.163.com:465 # SMTP relay endpoint in host:port format.
  smtp_auth_username: alert@openim.io # SMTP authentication username (commonly the same as smtp_from).
  smtp_auth_password: YOURAUTHPASSWORD # SMTP authorization token or app password.
  smtp_require_tls: false # Set to true when your SMTP provider requires STARTTLS.
  smtp_hello: xxx # HELO/EHLO identity presented to the SMTP server.

templates:
  - /etc/alertmanager/email.tmpl # Go template file used to render HTML email content.

# Root routing tree for all incoming alerts.
route:
  group_by: [ 'alertname' ] # Alerts sharing this label value are batched into one notification.
  group_wait: 5s # Initial delay before sending the first notification for a new alert group.
  group_interval: 5s # Minimum interval between notifications for the same alert group.
  repeat_interval: 5m # Reminder interval while an alert group remains firing.
  receiver: email # Default receiver when no child route matches.
  routes:
    - matchers:
        - alertname = "XXX" # Example matcher; replace with a real alert name or remove this route.
      group_by: [ 'instance' ] # Override grouping for this specific route.
      group_wait: 5s
      group_interval: 5s
      repeat_interval: 5m
      receiver: email

receivers:
  - name: email # Receiver name referenced by route.receiver.
    email_configs:
      - to: 'alert@example.com' # Recipient mailbox for alert notifications.
        html: '{{ template "email.to.html" . }}' # Rendered with the template declared in email.tmpl.
        headers: { Subject: "[OPENIM-SERVER]Alarm" } # Custom email subject line.
        send_resolved: true # Also send a notification when the alert recovers.