We encounter a blocking of mail sending to the addresses managed by Apple:
Currently the mailings to these addresses are blocked and a "permanent" error is displayed in your mail log available from the menu Administration > Dashboard.
We have contacted Apple services to fix this situation as soon as possible and we will keep you informed on this article when the problem is solved.
In the meantime, we suggest that you use an alternative email address from another provider (Gmail, Orange, Free, Proton, etc.). You can also activate push notifications to continue receiving your notifications.
The whole team apologizes for the inconvenience.