Fixing your quota problem often is as simple
as logging in to your email program and deleting email. Emails which contain
attachments use a significant amount of space. If you wait too long to correct
your quota problem, you may be unable to receive new email.
A copy of every email you send is stored in your Sent folder. Over time this
collection will significantly contribute to your quota usage. Click on the Sent
folder and remove as many emails as you can to help resolve the problem. Two
other folders which frequently contribute to quota problems are Trash and spam.
Please examine each and remove emails.