Fill in the blank: A ______ is an email that has been returned to the sender because the email address is invalid.
The correct answer is:
Hard bounces are bounces that indicate that the contact is ineligible to receive emails. HubSpot will automatically not send to these contacts in the future and they will appear in the Not Sent section of the post-send performance screen. HubSpot will automatically not send to contacts if they:
unsubscribe from all emails or the specific email type that was sent to them.
mark a previous email as spam.
permanently hard bounce from a previous email.
There are several categories that a bounce can fall in to, and HubSpot uses the wording in the server response, also known as the bounce message, to determine the reason for the bounce.