 To assure financial support for these obligations, the postal monopoly provides the Postal Service the exclusive right to deliver letters and restricts mailbox access solely for mail.The report argued that eliminating or reducing either aspect of the monopoly "would have a devastating impact on the ability ... to provide the affordable universal service that the country values so highly".Relaxing access to the mailbox would also pose security concerns, increase delivery costs, and hurt customer service, according to the Post Office.