<P> The official post office was created in 1792 as the Post Office Department ( USPOD ) . It was based on the Constitutional authority empowering Congress `` To establish post offices and post roads '' . The 1792 law provided for a greatly expanded postal network , and served editors by charging newspapers an extremely low rate . The law guaranteed the sanctity of personal correspondence , and provided the entire country with low - cost access to information on public affairs , while establishing a right to personal privacy . </P>
<P> The official post office was created in 1792 as the Post Office Department ( USPOD ) . It was based on the Constitutional authority empowering Congress `` To establish post offices and post roads '' . The 1792 law provided for a greatly expanded postal network , and served editors by charging newspapers an extremely low rate . The law guaranteed the sanctity of personal correspondence , and provided the entire country with low - cost access to information on public affairs , while establishing a right to personal privacy . </P>
who has the power to set up a postal system
who has the power to set up a postal system
Congress
Congress