default mail account becomes disabled on its own

default mail account becomes disabled on its own

My default mail account has not received mail in over an hour (I get mail EVERY 10 minutes without fail).

When I look at the account settings it says that it is disabled. (not by me). So I enable it again and save.

Then I go back to get mail - and nothing comes in. I wait a few minutes, and the account is disabled again.

What is going on? Thsi account is critical to me.