In an industry alert released on September 18, the United States Postal Service announced that it would be applying a network patch to their servers. This patch would affect the users of the Business Customer Gateway (BCG), the Facility Access and Shipment Tracking (FAST) System, PostalOne! System Electronic Data Exchange (Mail.dat / Mail.XML), and Program Registration.


    As of February 23, 2020, USPS servers will require use of the HTTPS security protocol, blocking any traffic requests that are not using TLS 1.2 or above. If your web services client software is not up to date or is not using TLS 1.2 encryption protocol, this patch may cause web connections to fail.


    This network update should not impact users connecting to USPS websites via the latest browsers, but if the browser or web services client software does not support TLS 1.2, your connections to USPS applications may fail.


    Users should contact PostalOne! Help Desk via email (postalone@usps.gov) or telephone (1-800-522-9085) for assistance. More information, including a guideline document which can help users verify if their browsers are updated, as well as links for testing usage, can be found on PostalPro.

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