To combat spam and bot traffic at email subscription points, marketers employ various techniques. Standard practices include CAPTCHA and double opt-in, with some suggesting hidden form fields (honeypots) in the HTML to deter automated sign-ups. Analyzing signup behavior, such as location, time, and referrer, can flag suspicious activity. While Mailchimp supports hidden fields, some advocate for server-side PHP solutions to validate forms. Restricting role-based accounts (abuse@, postmaster@) is also recommended. CAPTCHA's effectiveness is questioned due to captcha farms. Utilizing IP address blocking, JavaScript validation, analyzing form completion time, and blocking specific countries add further layers of defense.