Unable to get SMTP to fire emails

[DanielHouston]

I have been unable to get the SMTP notifier to file emails as a result of a pod_exists check failing.

I have an nginx pod running on GCP. All relevant SMTP secrets have been set as per: https://github.com/appscode/searchlight/blob/master/docs/tutorials/notifiers.md#smtp and I have checked their existence with kubectl.

The CRD yaml is as follows:

apiVersion: monitoring.appscode.com/v1alpha1
kind: ClusterAlert
metadata:
  name: pod-exists-demo-0
  namespace: default
spec:
  check: pod_exists
  vars:
    selector: app=nginx
    count: 2
  checkInterval: 10m
  alertInterval: 5s
  notifierSecretName: notifier-config
  receivers:
  - notifier: SMTP
    state: CRITICAL
    to: ["MY EMAIL ADDRESS HERE"]

which shows up fine in Icinga. After deleting the pods, I can see the check in Icinga turn critical, but I'm not getting an email. I've tried with 2 different emails (my personal exchange server and gmail.)

No logs in the searchlight-operator pod indicate any problems.
Nothing other than SuccessfulSync message when describing the cluster alert via kubectl