Understanding Postal: Spare Your Bottom-line

3. The USPS is tightening its flat mail eligibility criteria by providing more favorable rates to mail that can be processed on the Flat Sorting Machine (FSM) 100. It’s eliminating discount eligibility to pieces that previously could be processed on its FSM 1000.

4. The USPS is distinguishing what it calls “flat mail” into two separate categories. Automatable and Machinable Flat Mail, is reserved for FSM 100-compatible mail. Not Flats Machinable (NFM) is for pieces that don’t fit FSM 100 compatibility criteria. The Postal Service won’t really be treating NFMs as flats, but it also isn’t ready to reclassify such mail as parcels.