This is the error I get
There was a problem logging onto your mail server. Your Password was rejected. Account: ' [email protected] ', Server: 'mail.yourwebsite.com', Protocol: POP3, Server Response: '-ERR [IN-USE] Couldn't sync mailbox.', Port: 110, Secure(SSL): No, Server Error: 0x800CCC90, Error Number: 0x800CCC92
This is the cure
You ran out of disk space on your website account. You need to delete files in your website to make room for the emails or you need to upgrade to a larger hosting plan with more space for both emails and website.