Indiana Code Title 24. Trade Regulation § 24-5-22-2

Sec. 2. (a) As used in this chapter, “commercial electronic mail message” refers to an electronic mail message sent to promote the sale or lease of real property, goods, or services.

(b) The term does not include an electronic mail message to which an interactive computer service provider has attached an advertisement in exchange for free use of an electronic mail account, if the sender has agreed to such an arrangement.