I've just started having this problem on one of my Employee's phones too. I've tried a battery pull numerous times, and whenever I go to reply to a test (or ANY email for that matter) it does not give me a "Send" option. If I start an email from scratch I can send it, however it will not let me reply at all to other emails.
Looks like your email is not properly set up. Can you send an email from the address you are being sent messages to (not reply)?
Sometimnes BES allows you to receive emails from a personal address but not send from it.