Implement mailboxes based on Hibernate.

• DDL must be able to be generated/executed (but you should be able to turn that off)

• Jboss hibernate deployment+session management should be used.

• Mailboxes should be modified to be associated with a string "role".

• Access to mailboxes should be checked via UserRepository (http://jira.jboss.com/jira/browse/JBMAIL-7).

• option for second-level caching should be obtainable.

• Should work with MailStores for body and/or direct storage of the body.  (options should be "all messages in mailbox directly", "all messages in mailstore directly", "messages > xKB in mailstore, all others in mailbox")

http://jira.jboss.com/jira/browse/JBMAIL-8