Question
How may I add a process that would enable me to receive a copy of every sent email from the mailbox to a specified address?
Answer
You need to create the business process that would look like this:
It should start every time the new activity with category = Email and Message type = Outgoing is added to the system and read the email body from it. Then the email body should be sent within the new email to any address you specify in the last process element.