Outlook. Not receiving or sending emails

I have been trying to repair myn Outlook for 2 days now, but for the last year I have tried many times without result. I am amost sure the cause of this problem is related to too many accounts and trials. The problem started when I quit working for The University of Iceland, they had obliged me to add mail accounts to my Outlook which I never use and I do not know how to get rid of them

please contact me at [removed to protect privacy]

would like to resolve this issue today

I have no trouble with my Microsoft account but what I am experiencing is that when an email is sent to me it appears automatically in the deleted items box and not in the inbox, also, when I send an email lor reply to an email, it appears automatically in the deleted items box and not in the sent items box. How do I solve this problem? I hope that this clarifies the situation. I am using the new version of Outlook.

There is a yellow bar at the top stating my account needs attention but it will not let me sign in. I can see the emails through my phone app but not able to see any new emails on my personal computer.

Specific government domains are on hotmail blacklist, so I cannot receive emails from these institutions. How to resolve this problem?