Failing to maintain a clean email list can lead to several negative consequences:
1. Poor Deliverability: A high bounce rate can signal to ISPs that you are not managing your list properly, leading to deliverability issues. 2. Low Engagement: Sending emails to uninterested or inactive subscribers can result in low engagement metrics, affecting the overall performance of your campaigns. 3. Increased Costs: Paying for invalid or inactive subscribers can result in unnecessary costs, reducing the ROI of your email marketing efforts. 4. Blacklisting: Repeatedly sending emails to invalid or spam-trap addresses can result in your domain or IP being blacklisted, severely impacting your ability to send emails.