Prometheus-alert

Prometheus server
1

i have configured the alert rules in prometheus.yaml
rules.yaml part

  • name: pod alert
    rules:
    • alert: pod_status
      expr: min_over_time(sum by (deployment,namespace,pod) (kube_pod_status_phase{phase=“Failed”})[10m:1m]) > 0
      for: 1m
      labels:
      severity: critical
      annotations:
      summary: active state

and i am to create alerts which i am passing the email configuraion in alertmanager.yaml but i am unable to get alerts
alertmanager.yaml

global:
resolve_timeout: 5m
receivers:

  • name: ‘default-receiver’
    email_configs:
    • to: ‘to-mail’
      from: ‘from-mail’
      smarthost: smtphost
      auth_username: ‘to-mail’
      route:
      group_by: [‘pod_status’]
      group_interval: 5m
      group_wait: 10s
      receiver: ‘default-receiver’
      repeat_interval: 3h

even though some of pods are in failed state one of my support team said username and password are not required for smtp.
can anyone twll what is the issue is?