|Mail and Lettershop|
Bulk mail is mail that is prepared according to USPS guidelines which allows the mailer to receive postage discounts. In order to receive this discount, the sender is responsible for ensuring that the mail is prepared and presorted according to USPS guidelines. Bulk/permit mail at Penn is either First Class Pre-sorted or Non-Profit Mail. Stamped or metered mail is not bulk mail. Lettershop services are the activities required to prepare mail to be presented to the post office.