Increasing or decreasing mailbox quotas (size limits)
 

Hosting customers can use this link that explains increasing/decreasing mailbox quotas.

http://www.cpanel.net/support/docs/1...ange_disk.html

Remember unless you are a Managed Services Customer this is not a free service.
Our staff can adjust your quotas at a fee of $5 per mailbox.

Clients not subscribed to a Managed Services Customer are responsible for emptying their own server mail. We will empty mailboxes for NON-Managed Services Customer at a fee of $20 per mailbox.