As customers use your web app, Rebound checks whether their email address was marked inactive from a hard bounce.
If the email address is inactive, Rebound will show a notification on your web app asking them to update their email.
Failed API calls because of inactive recipients
"Message": "You tried to send to a recipient that has been marked as inactive. Found inactive addresses: email@example.com. Inactive recipients are ones that have generated a hard bounce or a spam complaint."
Upset customers expecting an important email
Rebound’s notification builder lets you customize the appearance and messaging without having to write a bunch of code. You can even include dynamic bounce data so your customers know exactly what’s going on.