Email bounces are instances where an email is returned to the sender because it could not reach the intended recipient. Hard bounces happen when an email is returned due to a permanent issue like an invalid email address, while soft bounces occur when an email is returned due to a temporary issue like a full inbox or a technical problem. For e-commerce enterprises, managing email bounces is crucial to enhancing email deliverability and customer engagement. By detecting and resolving email bounces, businesses can improve email open rates, increase customer engagement, and enhance revenue.