1. Over-Personalization: While personalization is key, overdoing it can come off as creepy or invasive. 2. Ignoring Data: Failing to analyze and act on consumer data can result in irrelevant content and decreased engagement. 3. Inconsistent Branding: Ensure that your email design and tone remain consistent with your overall brand identity. 4. Neglecting Mobile Optimization: Many consumers read emails on their mobile devices. Ensure your emails are mobile-friendly to enhance readability and engagement.