High bounce rates can hurt your sender reputation and impact deliverability. Bounces typically fall into two categories: hard bounces and soft bounces. To diagnose and address this issue, ask yourself:
Is my email list clean and up-to-date? Am I sending emails to invalid or non-existent addresses? Are there temporary issues with the recipient's server causing soft bounces?
Regularly cleaning your email list and using double opt-in methods can help reduce bounce rates. Ensure your list comprises engaged and valid subscribers.