Abnormally high opt-out rates in email campaigns are a multifaceted issue arising from technical, strategic, and content-related factors. Technical problems include unintended unsubscribes triggered by HTTP GET requests or spam filtering bots. Strategic concerns involve poor list hygiene, aggressive marketing tactics, and difficult unsubscribe processes. Content issues encompass irrelevant content, mismatched expectations, unclear value propositions, and failure to adapt to changing audience interests. Monitoring industry benchmarks, utilizing feedback loops, ensuring proper email rendering, and maintaining a positive sender reputation are essential for effective email deliverability.