I have my Blackberry setup on a BES from my company. In the Advanced Options my default shows as "Desktop" - which is my BES EMail.
When ever I setup my other home email accounts - when I go to compose a message - it says "Default" at the top but I do not get a send option. I have to go up top and change the email to "Desktop" for the send option to come up.
It is like when I install my other email accounts the phone doesn't know which to pick as my default.