Why not use the Postal Service? FedEx does (SmartPost)

FedEx sees record holiday volume, adding workers

"... One beneficiary will be the beleaguered U.S. Postal Service, which partners with FedEx for FedEx SmartPost deliveries. With SmartPost, FedEx delivers to post offices, which in turn make final delivery to residential customers...."  
Source: www.portfolio.com

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