Bounce rate

The bounce rate is a rate of rejected messages in reference to all the sent messages. To visualize it, if 10 emails out of 100 have been bounced, the bounce rate is 10%. A high bounce rate negatively affects your reputation as an email sender, together with the reputation of your domain. If it’s neglected, the email or the domain may get blacklisted, and as a result none of the sent emails will be delivered to anyone.