Cannot access emails on my ipad4 . I get ‘The connection to the server failed’ .

I used to be able to access my hotmail account on my ipad4 but since yesterday 10th Jan, I am getting 'The connection to the server failed'.

I have tried to delete and re-add the account, but still the same problem. I can access my hotmail account via Safari or computer with no problem.

I have tried to add someone else hotmail account and it works fine. I suspect, the problem is with my hotmail account *** Email address is removed for privacy ***.

Can you advise what the problem is?

Thanks
Danielle Li.