V5.2.3 - Gmail smtp connection refused

running grafana 5.2.3 on Kubernetes (local minikube cluster). Trying to configure SMTP alerting with the following parameters:

env:
- name: GF_SMTP_ENABLED
value: “true”
- name: GF_SMTP_HOST
value: smtp.gmail.com:465
- name: GF_SMTP_USER
value: mygmail
- name: GF_SMTP_PASSWORD
value: myemailpass
- name: GF_SMTP_SKIP_VERIFY
value: “true”
- name: GF_SMTP_FROM_ADDRESS
value: mygmail
- name: GF_SMTP_FROM_NAME
value: Grafana

According to the logs, config is overriden by the env variables. Trying to send test email, but it fails with:

Failed to send alert notification email " logger=alerting.notifier.email error="dial tcp 108.177.15.109:465: connect: connection refused.

Already tried different ports, 25 and 587. Any ideas of what might be wrong ? Same issue when using msn smtp server. Thank you.