You may recall than John Henninger Reagan was the third, and last, Secretary of the Treasury for the Confederate States.
He was also the only Postmaster General serving I’m that position throughout the entire existence of the CSA.
President Jefferson Davis chose Reagan to head the new Confederate States of America Post-office Department. He was an able administrator, presiding over the only cabinet department that functioned well during the war. Despite the hostilities, the United States Post Office Department continued operations in the Confederacy until June 1, 1861, when the Confederate service took over its functions. Reagan sent an agent to Washington, D.C., with letters asking the heads of the United States Post Office Department’s various bureaus to come work for him. Nearly all did so, bringing copies of their records, contracts, account books, etc. “Reagan in effect had stolen the U.S. Post Office,” historian William C. Davis wrote. When President Davis asked his cabinet for the status of their departments, Reagan reported he had his up and running in only six weeks. Davis was amazed.