550-Mailbox quota exceeded 550 Sender verify failed ??? hOW TO FIX IT

550-Mailbox quota exceeded 550 Sender verify failed ??? hOW TO FIX IT




 Sending failed; Reason:550-Verification failed for < MYNAME@MYDOMAIN.com> 550-Mailbox quota exceeded 550 Sender verify failed

Ive cleaned up all the boxes on all the accounts [ 4 of them ] ...

Logged In and Out ...

Now what?