How to know what versions of Mail.dat files the USPS PostalOne! site will support starting October 29, 2017

Products Affected:  MailStream Plus, Pbfirst, Planetpress 
October 29, 2017 is when PostalOne! releases MDR Client, which supports the new 17-2 Mail.dat version.
There will be a mandatory update of the MDR Client required.  As of October 29, PostalOne! will support 17-2 Mail.dat files. 

UPDATED:  November 1, 2017