I am not receiving any emails

I am not receiving any emails in my Hotmail account.  This stopped about 5 hours ago and up until then was sending and receiving fine.  I have signed in and out, changed passwords and browsers, both signing in via Hotmail.com and using my phone.  I have checked junk folder, blocked sender list, made sure emails are in my safe sender list, checked my email rules, junk mail settings and reply-to address all to no avail. I can send out emails to any of my other accounts but cannot receive any (apart from a welcome email from the one from Microsoft Community just now when I signed up. )  Your assistance would be much appreciated.