We recently purchased new cell phones for the company - BB Q10, BB Passport, BB Classic, and Apple iPhone 6+. The Q10 and Passport connected with no difficulty (Exchange 2010) but even though the Classic and iPhone seem to setup as expected, we can't send or receive any email messages. When trying to send a message using those two devices we get a "Server Rejected the Message" response. The former units - BB Bold - worked fine. We have a certificate on the server and setup the phones using SSL and port 443.