deploy-templates/mailu/templates/rolebinding.yaml

apiVersion: authorization.openshift.io/v1
kind: RoleBinding
metadata:
  name: {{ .Release.Name }}-admin
roleRef:
  name: admin
subjects:
  - kind: ServiceAccount
    name: {{ .Release.Name }}
    namespace: {{ .Release.Namespace }}
userNames:
  - system:serviceaccount:{{ .Release.Namespace }}:{{ .Release.Name }}
groupNames: []