I have mailboxes limited to 500MB. A user exceeded the limit and did not see the system email in their inbox. They left on a road trip and used OWA for email account access. What happens when they try to send an email. They claim that it looks like it sent but there was no sent item, no warning, no failure report so they "didn't know" the mail was not being delivered. What should exchange be doing when sending is attempted with an over the size limit mailbox when using OWA and Outlook 2003?