Sending Email Alerts doesn't seem to work

[ItsSundayGit]

Does anyone know why the email alerting doesn't work for us? We entered a receiving email adress under Cipp-Application Settings-Notifications-Email Adresses
Also we have added a Business Premium license to the CIPP service account.

[ItsSundayGit]

In the following picture, see the alerts we wish to receive.

[robdegraaf]

Did you add a mailbox to the CIPP service account?

From the documentation:
Email will be sent from the service account used for the SAM Wizard. The service account must have a mailbox available. This can be accomplished by either assigning a license with Exchange to the service account permanently or temporarily and converting the service account's mailbox to a shared mailbox. If you do not have a mailbox available on the account the log will state we could not send out the notifications.