This is from the USPS official site:
Mail Service News Release
FOR IMMEDIATE RELEASE
September 13, 2001 - 7PM EDT
Release No. 01-080
Nation's Postal System Running Well
Mail is being delivered across the country
WASHINGTON, D.C. - Employees of the United States Postal Service continue to take extraordinary measures to keep the nation's mail system operational. Expanded ground transportation systems have allowed the mail to reach its destination. Postal employees continue to collect, process and deliver mail to business and residential customers across the country except those affected areas in New York City.
"Our employees are doing their part to keep Americans connected through the mail," says Postmaster General John E. Potter. "From the nation's commerce, to cards and letters of support for families touched by these tragic events, we are getting the job done."
Since nationwide air transportation was suspended by the Federal Aviation Administration (FAA), an expanded ground transportation network is moving mail. Cargo flights are beginning to be used to move the mail. Once the FAA allows commercial flights to resume and carry mail, the Postal Service will work to move more mail by air.
Customers seeking updated postal information can check
www.usps.com for twice daily updates.