Definitions for "Metered Mail"
Mail that is automatically franked by a machine. The impression, which is a combined ‘postage stamp and postmark', marks the amount of postage paid and the date of posting, while the automatic machine ‘meters' or records the number of letters and the total postage.
Mail franked by postage meter machiness.
Any mail class with postage printed by an USPS-approved postage meter.