SMTP Notification Not Working

Configuration
1

I can’t get SMTP notification configured correctly according to this doc page.
Here’s what I’m putting in my configuration.yaml…

notify:
  - name: "SERVICE_NAME"
    platform: smtp
    server: "outlook.office365.com"
    port: 587
    timeout: 15
    sender: "{[email protected]}"
    encryption: starttls
    username: "{[email protected]}"
    password: "{password}"
    recipient:
      - "{[email protected]}"
    sender_name: "Home"

I’ve made sure that it’s identical to the example in the docs - even the order of fields.
I’m reloading the SMTP Notify Services via Developer Tools | YAML each time I change, but I’ve restarted the entire server too and it still doesn’t work.
I’m testing by going to Developer Tools | Services and trying to locate the service by notify.SERVICE_NAME but it doesn’t show up. Since it doesn’t even show up, I’m suspecting a problem in HA and not with my SMTP service configured credentials.

2

Did you create an app-specific password?

3

I didn’t, but I don’t have 2FA setup for the account I’m using, so I wouldn’t expect to have to. I would, of course, eventually want to get it set up with 2FA to protect the account, but I’m just trying to get the simpler case setup first.

4

The SMTP server is smtp.office365.com not outlook.office365.com .