test1	creating, saving, loading simple messages
test2	camelinternetaddress tests, internationalised addresses, etc.
test3	multipart messages
test4   more encompassing mime parser tests that test real-world messages.
        Note: In order to test this, though, you'll need to fetch 
        http://primates.ximian.com/~fejj/camel-mime-tests.tar.gz and 
        untar it into camel/tests/data/