No EMM can't do that at this time.
In fact, by default when you provision an iOS device by default you will only sync 3 days worth of mail to your provisioned mailbox. If you wish to keep more (or all) of your mail you can change the settings in:
Home / Settings / Mail, Contacts, Calendars / EMM Mailbox / Mail Days to Sync - change this to whatever value you want or even choose "No Limit"
The control of this is down to the user of the iPad, at this time I am not sure if can be enforced centrally.
I hope this helps.