I have one user on mailbox. User was close to storage quota and now user is unable to send or receive. When I try to send to user I get the following NDR. This is Exchange 2010 DAG maiblox.
username@####.com)
Your message wasn't delivered because the recipient's e-mail provider rejected
it.
Diagnostic information for administrators:
Generating server:
ALA-CAS. user@windriver.com
#550 5.7.288 Delivery has failed to these recipents or groups ##
Marvin Motley - Enterprise Engineer