Welcome to Justanswer.com, my name is ***** ***** I will do my best to assist you.
Im going to assume that you are not sending over 50 emails a day. Or sending bulk emails ( one email to 50 recipients)
Most likely, your account has been hacked and someone else is using it to send emails. ( Probably spam, or requests for money)
You need to immediately change your password.. Heres how.
If you cannot sign into your hotmail account, go to this link https://account.live.com/ResetPassword.aspx follow those steps and reset the password.
If you can sign in to your hotmail account. Instead, go to this link https://account.microsoft.com/privacy Sign into your hotmail account using your full email address and password. And then on the security and privacy section. Click change password. Then change your password.
That will stop your account from being used. And within 24 hours, you will no longer get the "sending too many emails" message.
Unless of course, you actually are sending a lot of emails!
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Senior Technician and Network Switching Systems Operator / Maintainer.