Bounce settings allow you to control how many consecutive soft bounces an email address can return before it's added to your suppression list.
A lower number helps protect your sending reputation; a higher number helps to avoid suppressing contacts who are legitimate but having a short-term issue with their email address.
Bounce settings are only applicable to a contact’s email address. If the contact also has a subscribed mobile number, this remains subscribed.
Adjusting the soft bounce setting
Expand the User menu in the bottom left, and go to Settings > Email > Suppression settings.
Either drag the slider or enter a number from 1-20 into the Soft bounces before suppressing an email address field.
The default setting is 20.
Select SAVE BOUNCE SETTINGS.