You can have final approved PO's automatically go to a separate email address by adding this within the Send Additional Custom PDF files under admin > PDF settings.
You will need to setup the custom PDF recipient you would like the email to be sent to when a PO has been final approved.
Once the pdf recipient has been setup then you can use a 3rd party software to automatically print any attachments, a software that has been recommended in the past would be Sperry software however please note we do not support or sell this software.