Operations At A United States Postal Service Processing And Distribution Center [Getty Images]

A customer wraps a United States Postal Service (USPS) priority mail package with tape at the USPS Suburban post office station in Gaithersburg, Maryland, U.S., on Tuesday, Dec. 19, 2017. The USPS anticipates delivering more than 15 billion total pieces of mail this holiday season with December 18-24 expected to be the busiest mailing and delivery week. Photographer: Andrew Harrer/Bloomberg via Getty Images

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