Prepare for the Updated Email Bounce Warning
Where: This change applies to Lightning Experience in the Essentials, Professional, Enterprise, Performance, Unlimited, and Developer editions.
Who: If the user has update rights to the record, they can click Edit to update the contact’s email address. Updating the email address removes the bounce warning.
Why: On the contact, lead or person account record, a bounce warning appears next to the email address in the highlights panel.
Reps can also see the bounce warning in the activity timeline.