The United States Postal Service® (USPS®) is issuing a mandatory software update for the PostalOne!® production system this weekend. This update will be implemented on Sunday, January 3, 2016. The PostalOne! Production (PROD) system will not be available on Sunday morning January 3, 2016, between 12 midnight and 10 a.m. CT. PostalOne! will also be updating the Test Environment for Mailers (TEM); that update will occur on Monday, January 4, 2016. The PostalOne! TEM environment will not be available between 6 a.m. and 4 p.m. CT on January 4. The new Mail.dat® client download for the Production Environment will be version 126.96.36.199_PROD; all previous versions of the Mail.dat client will be expired.
Read more: http://www.windowbook.com/Learning/Postal-Concierge-E-tips