1. Deliverability Issues: Check your email list for invalid addresses and ensure compliance with best practices. 2. Bounce Management: Use a bounce handling system to remove or correct invalid email addresses. 3. Spam Complaints: Review your content and frequency to ensure they align with recipient expectations. Consider segmenting your list to target more relevant audiences. 4. Low Open Rates: Experiment with different subject lines and sending times to improve engagement. 5. Low CTR: Review your email content and call-to-action (CTA) to make them more compelling and relevant. 6. High Unsubscribe Rates: Gather feedback from those who unsubscribe to understand their reasons and adjust your strategy accordingly.