Texas Business and Commerce Code - BUS & COM § 321.052. Requirement for Transmission of Unsolicited Commercial Electronic Mail Messages

(1) “ADV:”  appears first in the subject line of the message or, if the message contains obscene material or material depicting sexual conduct, “ADV:  ADULT ADVERTISEMENT” appears first in the subject line;  and

(2) the sender or a person acting on behalf of the sender provides a functioning return electronic mail address to which a recipient of the message may, at no cost to the recipient, send a reply requesting the removal of the recipient's electronic mail address from the sender's electronic mail list.