I keep being told that my mail has reached maximum and I need to delete something, but it cannot possibly be full.

I used to be able to do this regularly when I was using the old Outlook.

Please help.

I have been trying to sort this out for the past month.  I have received private messages asking me to give specific details such as my email address and even send a photo of the error message, but nobody has then helped me further.

I really am wasting so much time, effort and money on this problem.

Why can somebody from Microsoft not contact me?