To combat relentless spammers who switch domains and send via Google Workspace, a multi-faceted approach is necessary. Reporting the spammer to Google, identifying the ESP for complaint, and utilizing Gmail's filtering capabilities (including wildcards) are essential. Furthermore, employ best practices such as using temporary email addresses, reviewing privacy settings, and unsubscribing from unwanted lists. For domain protection, implement DMARC records. Report phishing attempts to Google via abuse@google.com.