We strongly recommend using a dedicated email service. Email server setup and maintenance is _very_ difficult even for experienced system administrators, and getting any part of the complex required email setup wrong means your email won't be delivered, or worse, delivered erratically.
Use these values when you [edit your Discourse `app.yml` configuration file](https://github.com/discourse/discourse/blob/master/docs/INSTALL-cloud.md#edit-discourse-configuration):
If not using **the exact** domain you verified (e.g. you're using a subdomain of it), you must change the default `from` email to match the sending domain. Uncomment (and update with your sending domain) this line in `app.yml`:
```yml
- exec: rails r "SiteSetting.notification_email='info@unconfigured.discourse.org'"