An acceptable email bounce rate is typically under 2%. You should aim for a bounce rate lower than this for effective email marketing. A bounce rate higher than 2% can indicate issues with your email list or delivery. You must regularly clean your list to avoid high bounce rates. You should also verify email addresses before sending emails. A high bounce rate can damage your sender reputation and reduce deliverability. You can check your bounce rate using email marketing tools. You should focus on improving your email list quality to maintain a healthy bounce rate for better results.