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Tech Notes

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 Favorite Services, click on Electronic Data Exchange
if you don't have Electronic Data Exchange, click on Postal Wizard. Then in the left-hand navigation, click on 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

Right click on 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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