GLOSSARY
Automation-compatible mail
By Justin Winter · Updated August 28, 2026
Mail prepared to USPS specifications — correct size, a valid barcode, standardized address placement — so it can be sorted entirely by machine, which qualifies it for lower postage rates.
USPS charges less to process mail its equipment can read and sort without human intervention: the right paper stock and envelope dimensions, a correctly encoded Intelligent Mail Barcode, and an address printed where scanning equipment expects to find it.
A piece that fails any of those checks can still be delivered, but usually loses the automation discount and gets routed through slower, non-automated handling instead.
See also
- Intelligent Mail barcode — The USPS barcode printed on letter mail that encodes routing and a unique piece identifier, enabling automation rates and tracking.
- Presort — Sorting mail into ZIP code order, and grouping it into USPS-defined batches, before it is entered into the mail stream — required for many commercial discount rates.
- Delivery Point Validation — A USPS check that confirms an address is a real, individually deliverable delivery point — down to the apartment or suite.
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