What is bounced email? Bounce email is an email that couldn’t be delivered to the inbox. There are two types of email bounces, namely soft and hard bounces. Soft bounces come from a temporary issue, such as full inbox, lack of connection, etc. Resend the email and it would probably get delivered. Hard bounces, on the other hand, are troublesome. They happen when you shoot an email to a non-existing email address. Don’t worry if you get a few bounces. Nevertheless, a high bounce rate may lower your sender’s reputation.