Low Open Rates: If recipients are not opening your emails, it may indicate that the subject lines or content are not relevant to them. High Unsubscribe Rates: A high number of unsubscribes can signal that your content is not meeting the expectations of your audience. Increased Spam Complaints: If recipients are marking your emails as spam, it is a clear indicator that they find your content irrelevant or intrusive. Poor Click-Through Rates: Low click-through rates can suggest that the content within your emails does not resonate with your audience.