In LiveWhale 2.x and before this was called PUBLIC_NOTIFICATIONS_EMAIL. That name is still supported in 3.0 for backwards compatibility, but the new name is SUBMISSION_NOTIFICATIONS_EMAIL.
Set email address or comma separated addresses for email notifications when submissions are made to the Submitted Content group
Accepted values: string
Context: Front-end (client/public.config.php)
In LiveWhale 2.x and before this was called PUBLIC_NOTIFICATIONS_EMAIL. That name is still supported in 3.0 for backwards compatibility, but the new name is SUBMISSION_NOTIFICATIONS_EMAIL.