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®
When the USPS releases an update to PostalOne, the mail.dat file can no longer be uploaded with the old version. You must update to the latest version.
- Download the latest version of PostalOne. Make sure that you select the version that matches your current PostalOne installation.
- Extract the downloaded file to C:\PostalOne\. If PostalOne was installed in a different location, use that directory instead.
- When prompted, overwrite all existing files.
- Resubmit your mail.dat file to USPS using the new PostalOne client.
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UPDATED: January 30, 2026