Thank You Laszlo - quite helpful.
Since we are using SAPScript forms, I believe for SAPPDFPRINT we need to have Adobe forms.
We also trying using PDFUC device type and it is working up to the expectation in preliminary testing/poc environment with the "Host Spool Access Method" as "Email Receiver" and I am getting large attachments in my email.
The next worry is how I can extract just the PDFs from any email using any standard or custom SAP code... I wish there would be access method to store the output as file or something...
/Kamal