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Updating the USPS PostalOne client for ConnectRight Mailer, PB First, and PlanetPress

USPS released an update to PostalOne. The mail.dat file can no longer be uploaded with the old version.
Products affected: ConnectRight™ Mailer, PB First™, PlanetPress®

USPS released an update to PostalOne. The mail.dat file can no longer be uploaded with the old version.

  1. Download the latest version of the USPS PostalOne client.
  2. Extract the downloaded file MDRClient-win32-PROD.zip to the PostalOne folder and overwrite all files. The PostalOne folder is located at C:\PostalOne\, unless a different location was used when it was installed.
  3. Resubmit your mail.dat file to USPS using the new PostalOne client.

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UPDATED: January 13, 2022