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Submitting a Mail.dat file to the USPS Gateway using the PostalOne! client for PlanetPress

If needed, you can resubmit a mail.dat file to the USPS Gateway.

Products affected: PlanetPress®, ConnectRight® Mailer

If needed, you can resubmit a mail.dat file to the USPS Gateway.

  1. Browse to C:\PostalOne. If PostalOne was installed in a different location, use that directory instead.
  2. Open run-mdclient.bat and sign in.
  3. Select Job Validation/Upload > Add Jobs.
  4. Browse to the mail.dat and select Open.
  5. Select Upload after validation.
  6. Select Validate and Upload.

UPDATED: January 30, 2026