If you want to be notified when emails bounce back, such as those sent from a marketing campaign, follow these steps:
Navigate to Setup > Staff Record and open your staff profile.
Add your email address or the address of a shared email folder that you can access.
Click Save, then log off and back on to apply any changes to your staff record.
Once this is set up, any bounced emails will be directed to the specified email address.
If you don't have access to this section of the system, please contact your Line Manager for assistance.