Month: August 2018

New USPS Ruling that Advances EnvyPak’s Automation Letter Rate Approval, Adding Features That Provide Additional Savings Postage reduced up to 54.6%; address label not required for EnvyPak machinable poly envelope Columbus, Ohio – EnvyPak received another new ruling from the United States Postal Service (USPS) that provides lower automation letter rates for a specially formatted, polypropylene (poly) envelope that now does not require an affixed mailing label, can be sealed with glue .