RCW 19.190.020: Unpermitted or misleading electronic mail—Prohibition.

(1) No person may initiate the transmission, conspire with another to initiate the transmission, or assist the transmission, of a commercial electronic mail message from a computer located in Washington or to an electronic mail address that the sender knows, or has reason to know, is held by a Washington resident that:

(a) Uses a third party's internet domain name without permission of the third party, or otherwise misrepresents or obscures any information in identifying the point of origin or the transmission path of a commercial electronic mail message; or

(b) Uses a subject line which, based on the person's actual knowledge or knowledge fairly implied on the basis of objective circumstances, contains false or misleading information in the subject line.

(2) For purposes of this section, a person knows that the intended recipient of a commercial electronic mail message is a Washington resident if that information is available, upon request, from the registrant of the internet domain name contained in the recipient's electronic mail address.