Amazon's new USPS deal will cut postal deliveries by 20 percent

Amazon and the U.S. Postal Service reached a tentative deal to cut USPS deliveries from Amazon by 20 percent.

Amazon supplies about 15% of USPS volume and roughly $6 billion in revenue, making it the Postal Service’s largest customer.

The 20% reduction could cost USPS more than $1 billion in revenue and follows a period of halted talks and a new USPS bidding process.

The agreement remains subject to approval by the Postal Regulatory Commission.