You received this warning message because you have surpassed your allotted disk space storage of 25 GB on the VT Google Apps Mail server. You may have reached your quota if you received one or more messages containing a large attachment, you received an unusually large number of messages since the last time you checked your email, or if you have not been deleting old email messages.
To delete messages from the server:
If you want to keep the messages, but you do not currently use an email client to check your email, refer to the VT Google Apps Mail page.
For more information about the VT Google Apps Mail quota, refer to VT Google Apps Mail Mailbox Management.