An email is said to have bounced when it fails to reach the recipient’s mailbox and is left undelivered. It is quite common and can happen because of a number of reasons. Based on these reasons they can be divided into two categories Hard Bounce and Soft Bounce.
In the world of email marketing, not all emails make it to their destination, which is the recipient’s mailbox. Hence, is advisable to manage the mailing list from time to time and keep a check on accounts that bounce. It is also advisable to keep the bounce rate below 2%.