United States Statutes at Large/Volume 2/6th Congress/2nd Session/Chapter 9
Letters to John Adams to be free of postage.
Act of March 3, 1801, ch. 35, sec. 3.Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, That all letters and packets to John Adams, now President of the United States, after the expiration of his term of office and during his life, shall be carried by the mail, free of postage.
Approved, February 25, 1801.