It would be (quite) trivial to create an alert. However, I think terms of service to the _end_ customer should be outside of the purview of ISPConfig or any control panel for that matter.
Using/not using of functions that may have an impact on privacy is entirely up to the administrators of the system, and they should probably include terms of service in their contracts with customers or at minimum in the welcome mail to customers.
As an example, this function is going to be used in a corporate mail system, where the employees are explicitly informed that mail can/may be monitored for auditing purposes.
In any case, it is (equally) trivial to create monitoring systems of this nature outside of ISPConfig by directly editing/adding sender_bcc_maps/recipient_bcc_maps/always_bcc to the postfix configuration files.
Last edited by bharathchari; 12th November 2012 at 13:27.