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.
Visit gateway.usps.com
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 MDRClient-win64-PROD.zip 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.
