According to the official website for the National Postal Forum, mailers will need to update their mailing and shipping software to accommodate price changes. There is also a new Mail.dat file format specification going into effect at the same time, version 15.1.
Because it took so long to get approval of the proposed changes, software providers have hustled to complete the coding necessary for these changes. Mailers must get the software updates installed and tested in time for the pricing implementation date.
Mailers should work now with their software providers to download and install all software updates as soon as they become available. A mandatory PostalOne! Update came out on May 17, which will require mailers who submit eDoc to download and install the new USPS MDR client software as soon as possible.