Hi, we’re not sure where that sort of email could have come from – we’re currently testing some cloud save capabilities as an experiment in arcade, but usage of that is very limited / there wouldn’t be an email like that coming from there.
The other possibility would be if they were referring to a forum account that was closed due to violating the code of conduct, but that’s fairly rare as well.
If you have more details that you could share, could you email us at makecode@microsoft.com and we can investigate?