What is a bounce in Email Campaign?
Bounces occur when sent emails cannot be delivered. Typically, the email server will send you an error message detailing the reason for a bounce. Bounces come in two categories: hard and soft bounces. A soft bounce is just a temporary delivery failure; the email should get delivered in the next few retries. Even after that if the email does not get delivered, a hard bounce will occur. A hard bounce means there is a permanent reason for the delivery failure. To avoid bounces:
Use the double opt-in subscription method when adding subscribers to your list.
Send emails to your clients periodically, keeping your list clean.
Track your email delivery and make any necessary changes to your mailing list immediately.
Authenticate your sender domain