Sender Law and Legal Definition
According to 15 USCS § 7702 (16), [Title 15. Commerce and Trade; Chapter 103. Controlling the Assault of Non-Solicited Pornography and Marketing]
“(A) In general. Except as provided in subparagraph (B), the term "sender", when used with respect to a commercial electronic mail message, means a person who initiates such a message and whose product, service, or Internet web site is advertised or promoted by the message.
(B) Separate lines of business or divisions. If an entity operates through separate lines of business or divisions and holds itself out to the recipient throughout the message as that particular line of business or division rather than as the entity of which such line of business or division is a part, then the line of business or the division shall be treated as the sender of such message for purposes of this Act.”