As a user of the ShipVista platform, you can connect your USPS rates while enjoying seamless connectivity within ShipVista's shipping solution.Access Priority Mail Express Flat Rate® Envelope Rates with ShipVista
More on shipping with USPS - Common questions about USPS.
You can track USPS shipments using the tracking number for the shipment provided withing ShipVista and visiting the USPS website.
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