I propose an alternative solution, with the blackberry in mind.
In my office, we previously had Outlook filing options set up for emails to go to the Deleted Items folders, in specific project folders, with the related sent project emails filed in the same location.
The problem with that is that Blackberry does not sync the Deleted Items folder.
No problem, just create another folder in your Inbox (say, “Projects”), and use the same options noted above.
Then, on your blackberry, in your Message Options, General Options, change the number of days your blackberry keeps emails (last option. Mine is currently set to keep cached 30 days worth of email, which to me is a comfortable number (if I need something that fast in the field, it most likely happened within the last 30 days, and my blackberry can handle that amount of email memory). But you can choose between 15 days and forever.
The caveat is that you will have to manually delete filed emails from your computer’s Outlook - no big deal, do it once a month or whenever your IT admin complains of your account being too large.
This solution resolves the issue of filing emails into Newforma appropriately (vs. them sitting in your Inbox), while still having access to a decent recent incoming and outgoing set on your blackberry.