Common pitfalls in email marketing include neglecting to segment the email list, leading to irrelevant content for recipients. Overloading subscribers with too many emails can cause annoyance and increase unsubscribe rates. Neglecting the design and mobile optimization of emails can affect readability and engagement. Failing to personalize emails and not having clear calls-to-action can reduce effectiveness. Likewise, not tracking or analyzing campaign performance misses opportunities for improvement. Ignoring email marketing regulations can lead to legal issues and damage brand reputation.