Update PostalOne Application

Periodically the USPS requires updating the PostalOne application, used for submitting mailing paperwork electronically. This tech note contains instructions on how to update this application.

In Dashboard Management System, click on Electronic Data Exchange

Click on Download Client Application (Windows 64-bit) in Mail.dat Support for Production section

MDRClient-win64-PROD.zip will appear in Downloads

Extract the .zip file to the MDRClient-win64-PROD folder

Visit gateway.usps.com
In Favorite Services, click on Dashboard or Electronic Data Exchange
- if you don't have Electronic Data Exchange in Favorite Services, click on Dashboard. Then in the left-hand navigation, click on Electronic Data Exchange
  - You can edit Favorite Services and add Electronic Data Exchange
In the Mail.dat Support for Production section, click on Download Client Application (Windows 64-bit)
After the download completes, browse to your Downloads folder
Click on MDRClient-win64-PROD.zip then click the Extract All button (or right-click on the .zip file and choose Extract All)
- Make sure this extracts into \Downloads\MDRClient-win64-PROD

Your PostalOne application has now been downloaded and updated, and is ready to use.

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