Alert component not sending email

I have an Alert component set up to send me an SMS via email when I forget to close my garage door. This used to work but doesn’t anymore I can’t figure out why. Currently running 0.65.1 but this has been an issue for a couple of months and I’m just getting to it.

In fact, it seems to be ok – except that the email doesn’t actually get sent…

  • The configuration is valid YAML
  • When the garage door opens, the alert shows up in the front end (and can be dismissed)
  • When the garage door closes, the alert goes away
  • I can trigger my “notify.sms_email” notifier manually via the developer tools and I get the email

Is there something simple I’m missing?

cover:
  - platform: myq
    name: garage_door_opener
    username: !secret myq_user
    password: !secret myq_password
    type: chamberlain


alert:
  garage_door_alert:
    name: Garage Open Alert
    entity_id: cover.garage_door_opener
    state: 'open'
    repeat:
      - 5
      - 10
      - 30
    can_acknowledge: true
    skip_first: true
    notifiers:
      - sms_email

Although this seems to be fine, including it here for reference:

notify:
  - name: sms_email
    platform: smtp
    server: !secret smtp_server
    port: !secret smtp_server_port
    sender: !secret smtp_from
    encryption: tls
    timeout: 60
    debug: true
    username: !secret smtp_user
    password: !secret smtp_password
    recipient:
      - !secret boris_sms_email
      - !secret lisa_sms_email
      - !secret boris_email

Still not working on 0.65.5. Any ideas appreciated. Thanks!