kube-prometheus设置alertmanager邮件配置？

内网环境下，配置kube-prometheus中的alertmanager邮件
配置如下
global:
resolve_timeout: 5m
smtp_smarthost: "xxxxxx"
smtp_from: "xxxxxx"
smtp_auth_username: "zxxxxx"
smtp_auth_password: "xxxx"
smtp_require_tls: false
route:
group_by: ["alertname", "cluster", "service"]
group_wait: 10s
group_interval: 10s
repeat_interval: 1m
receiver: "test-mails"

receivers:

• name: "test-mails"
  email_configs:

  • to: "xxxxxxx"

使用k8s1.14版本，kube-prometheus release-0.3

现在报错

有哪位老师可以指点一下么