(a) The definition of mail in this chapter includes:
(1) first-class mail;
(2) first-class United States mail;
(3) ordinary or regular mail; and
(4) international first-class mail.
(b) The definition of mail in this chapter does not include:
(1) any form of mail that requires proof of delivery;
(2) certified mail;
(3) certified mail or a comparable mailing method that provides proof of delivery;
(4) certified mail, restricted delivery;
(5) certified mail, return receipt requested;
(6) delivery by the United States Postal Service using a signature confirmation service;
(7) documents delivered by common or contract carriers, including Federal Express or United Parcel Service;
(8) express mail offered by the United States Postal Service;
(9) first-class mail, return receipt requested;
(10) freight mail;
(11) interagency mail;
(12) international registered mail, return receipt requested;
(13) mail, return receipt requested;
(14) personal service or hand delivery;
(15) prepaid registered mail;
(16) registered mail;
(17) registered mail, return receipt requested; and
(18) certified or registered mail, restricted delivery, return receipt requested.