Prohibited acts - rulemaking authority, attorney general.
Mo. Rev. Stat. § 407.1138
in effect407.1138. Prohibited acts — rulemaking authority, attorney general. — 1. It shall be a violation of this section for any person or entity who initiates the transmission of any commercial electronic mail message to any subscriber in this state to provide a false identity or false or misleading information in the subject line.
2. It shall be a violation of this section for any person that sends an unsolicited commercial electronic mail message to fail to use the exact characters "ADV:" as the first four characters in the subject line of the unsolicited commercial electronic mail message.
3. It shall be a violation of this section for any person that sends an unsolicited commercial electronic mail message that contains obscene material as defined in section 573.010 or references a website that contains obscene material to fail to use the exact characters "ADV:ADLT" as the first eight characters in the subject line of the unsolicited commercial electronic mail message that contains obscene material.
4. It shall be a violation of this section to initiate the transmission of any unsolicited commercial electronic mail to a subscriber in this state who has notified a sender not to initiate the transmission of any further unsolicited commercial electronic mail. For purposes of this subsection, a subscriber is deemed to have notified a sender not to initiate the transmission of any further unsolicited commercial electronic mail if the subscriber:
(1) Replies to a sender at the valid sender-operated return electronic mail address or the sender's toll-free telephone number with directions not to initiate the transmission of any further unsolicited commercial electronic mail as provided in section 407.1123 ; or
(2) Otherwise gives actual notice to a sender not to initiate the transmission of further unsolicited commercial electronic mail; or
(3) Notifies the attorney general if a sender fails to provide a toll-free telephone number or valid sender-operated return electronic mail address as required by section 407.1123 .
5. The attorney general shall promulgate rules and regulations as he or she deems necessary and appropriate to fully implement the provisions of sections 407.1135 to 407.1141 .
(L. 2003 H.B. 228 § 407.1144)
Source: Open US Law by Vaquill AI (CC BY 4.0)URL: https://revisor.mo.gov/main/OneSection.aspx?section=407.1138Fetched: 10/17/2026