A more thorough explanation:

The Ninth Circuit Court of Appeals is a federal court that has jurisdiction over several states in the western United States, including Washington, Oregon, California, Montana, Idaho, Nevada, Arizona, and Hawaii, as well as the Territories of Guam and the Northern Mariana Islands.

The Ninth Circuit Court of Appeals has made several rulings related to spam emails and consumer protection laws. In the case of Gordon v. Virtumundo, the court interpreted the CAN-SPAM Act's standing requirements for "internet access service" providers and ruled on the preemption of claims under Washington State's Commercial Electronic Mail Act ("CEMA").

For example, if a company sends deceptive emails with false or misleading header information or subject lines, a claim brought under CEMA may be dismissed as preempted by the CAN-SPAM Act. However, claims brought under other state consumer protection laws or common-law frameworks may still be valid if they are not specific to commercial email and show a direct causal connection between the acts violating the law and actual damages suffered by the plaintiff.

One example of a state consumer protection law is Washington's consumer protection statute, which may apply to commercial emails that contain significantly false or misleading information. If a plaintiff can show that they suffered actual damages as a result of the deceptive emails, they may be able to bring a successful claim under this statute.

The Ninth Circuit Court of Appeals plays an important role in interpreting federal laws related to spam emails and consumer protection. Its rulings help to clarify the standing requirements for internet access service providers and the preemption of state laws related to commercial email. By understanding these rulings, individuals and companies can better protect themselves from deceptive email practices and ensure that they are in compliance with relevant laws and regulations.