The main mailbox we use, we have decided to close the topic to avoid a major problem and take the domain offline.
We contacted the email provider and retrieved the mailbox.
Regarding the data, no theft was committed.
I am having a hard time understanding what you mean here, what happened to your 'main mailbox'. Were you hacked or something? Can you try to be more explicit about what happened, you might even get better suggestions from members here, to avoid a repeat in the future.
Yes the mailbox has been hijacked 🫤.