In order to keep our email delivery rates high, ClassroomParent must follow email protocols and not send emails to addresses that have stopped being deliverable.
And email address can stop being deliverable for many reasons:
In any of the above cases, ClassroomParent receives notices that we should no longer send messages to that email address, so we change the email status of the person belonging to that address to one that indicates messages should no longer be sent.
So first view the person's profile and verify their email status. If it is not Send Me Email, then have the person login to ClassroomParent and update their status.