I am using outlook and keep getting the message that my mailbox is full. I have folders set up under my inbox in order to sort them, but I have done the archive to items from 3 months ago and I still keep getting the message. I had the same set up in Outlook 2010 but once I archived the message went away. My mailbox size in 600 MB. Is there something else I should do, or is this a problem on the new Outlook?