Business Customer Gateway production environment will be unavailable on Sunday, November 13, 2011, from 5 a.m. to 6 a.m. CST for scheduled maintenance. During this time, all USPS® services accessed through the Business Customer Gateway -including PostalOne!®, FAST®, Mailer ID, Program Registration and eDoc submission via Mail.XML® and Mail.dat® - will be unavailable. Electronic Mail Improvement Reporting (eMIR) will be unavailable to internal and external users during an extended maintenance window on Sunday, November 20, 2011, from 4 a.m. to 9 a.m. CST.