The CAN-SPAM Act of 2003 establishes requirements for commercial email messages. A central provision of the Act is the recipient's right to opt out of future emails. The Act mandates that senders must honor an opt-out request promptly, specifically within 10 business days. The statement that it could take 180 days to process this request is a direct violation of the law. The other options listed—clearly indicating the email's content, providing the sender's physical location, and offering an opt-out method—are all explicit requirements under the CAN-SPAM Act.

A. The Act requires that the subject line not be misleading and that the message be clearly and conspicuously identified as an advertisement or solicitation.

B. The Act mandates that every commercial email must include the sender's valid physical postal address, which for a real estate agent would be their brokerage's location.

C. A core requirement of the Act is to provide a clear and conspicuous explanation of how the recipient can opt out of receiving future commercial emails.

1. Federal Trade Commission (FTC). CAN-SPAM Act: A Compliance Guide for Business.

Page 2, "Tell recipients how to opt out of receiving future email from you": "You must honor a recipient’s opt-out request within 10 business days." This directly refutes option D.

Page 1, "Don’t use false or misleading header information" and "Don’t use deceptive subject lines": These sections support the requirement in option A.

Page 2, "Tell recipients where you’re located": "Your message must include your valid physical postal address." This supports the requirement in option B.

Page 2, "Tell recipients how to opt out of receiving future email from you": "Your message must include a clear and conspicuous explanation of how the recipient can opt out..." This supports the requirement in option C.

2. University of Washington. IT Connect: CAN-SPAM Act Guidance.

Section: "What are the main requirements of the CAN-SPAM Act?": This document outlines the key provisions, including: "Honor opt-out requests promptly. You must be able to process opt-out requests for at least 30 days after sending your message. You must honor a recipient’s opt-out request within 10 business days." This corroborates the FTC's 10-day rule and confirms option D is incorrect. The page also lists the requirements for a valid physical address and clear identification as an advertisement.