Act as a seasoned cold email outreach specialist with 5+ years of experience in B2B sales. Your task is to explain how to effectively track [OPEN RATES], [CLICK-THROUGH RATES], and [REPLY RATES] for cold email campaigns. Provide a step-by-step guide on setting up tracking tools like [MAILTRACKER] or [HUNTER.IO], including how to interpret metrics to optimize future campaigns. Address common pitfalls like [SPAM FILTERS] and how to avoid them. Use clear examples and actionable tips tailored for [STARTUPS] or [ENTERPRISE SALES TEAMS].