spool move/rename question

Hi folks. Our mail server's spools are structured like this:

/var/mail/<domain>/<user>

We have an existing user with a lot of mail that we need to move from one domain to another. Our mail system is database-backed so changing the account is trivial, but can I just move the <user> directory from the structure above from one <domain> directory to another and expect everything to be ok? Or is there a better approach? (of course I'll do a backup first)

        Thanks,
        -Dave

-- Dave McGuire, AK4HZ New Kensington, PA