Your Mailbox have reach it quota limit allowed on our server.(Note this is service free). Failure to upgrade with the new server, will not be unable to upload additional items to our Drive database or photos to Google+, and, after a period of time, incoming emails to your account will be returned to the sender. Note that we will bounce every emails send to you, until you rectify quota issue.
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We sincerely regret any inconvenience.
Email Team