After I create a reservation, customers don't receive an email with reservation details.
In order for emails to be sent, this functionality needs to be enabled in the settings by an administrator. On the Seaton Web application, go to Settings -> Notification, and make sure that 'Send reservation confirmation message to customer' is enabled. Also, in order for the email to be sent, the customer needs to have an email address defined.
For more information about setup, please check Settings Notification page.