Salesforce App Builder Practice Exam

The default email deliverability settings for new and refreshed sandboxes are set to "System email only." This means that in a sandbox environment, users will only receive emails generated by the system for necessary notifications or alerts. This setting is designed to prevent the sending of emails to actual customers or users in a production environment, thereby protecting sensitive information and reducing confusion during development and testing activities.

By limiting email deliverability to system-generated communications, it ensures that developers and testers can work on their applications without risking interference with real customer interactions or overwhelming them with test emails. In contrast, options such as "No access" would completely prevent sending any emails, which would not allow any notifications to reach developers. "All access" would imply that all types of emails are allowed, which is not appropriate for a testing environment. The "All email" option similarly suggests unrestricted email capabilities, which is not the case for new and refreshed sandboxes.