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You can configure Astro Private Cloud (APC) to not send outbound email.
Setting astronomer.houston.config.publicSignups: true with astronomer.houston.config.email.enabled: false is only secure when all non-OIDC authentication backends are explicitly disabled and the OIDC provider provides sufficient user validation to prevent untrusted users from accessing APC.
To disable email transmission and email verification of users attempting to access the platform:
  1. In your values.yaml file, set astronomer.houston.config.email.enabled to false.
  2. Set astronomer.houston.config.publicSignups to true.
  3. Remove the EMAIL__SMTP_URL list-item from astronomer.houston.secret.