Well, not an e-mail but I found this on my account when I tried to access it - my bold and underline:
Your account has been temporarily blocked
Someone may have used your account to send out a lot of junk messages or done something else that violates the Microsoft services agreement.
What do you need to do?
We'll send a verification code to your mobile phone. All you need is a phone that can receive text messages. After you enter the code, you can sign in.
They don't have - and never will have a phone number for me.
Anyone else had this message?