在美国亚马逊买东西,收到一封邮件是啥意思?

在美国亚马逊买东西,收到一封邮件是啥意思?
Hello,
We're writing about the order you placed on September 03,2014 (Order# 002-4676781-2969059).
USPS attempted to deliver your package but was unable to leave the package unattended.In order to make arrangements for redelivery or pickup at your local Post Office,please visit https://redelivery.usps.com/ and use the package tracking number 9361289877958103228
If the package was attempted to be delivered to a business location that was closed during the time of the delivery attempt,USPS will automatically attempt to redeliver the package on the next business day.
If your package was to be shipped to a PO Box address,it was likely too large to leave in your particular post office box.
For more information about picking up this package,please visit http://www.***.com and click "Locate a Post Office" to find contact information for your local post office or call 1-800-ASK-USPS.
The items listed below are included in this package: