southwestcomm -- we're only interested in sending to
Blackberries; for this application, we don't care about the security of messages from
the BB. And the transport layer, as far as I can tell, is only secure from the tower to the BB; from our machine to Blackberry.com's SMTP server is not.
headtailgrep -- I am
the IT professional.
Unfortunately I haven't worked much with Blackberries before. We've talked to our carrier, and their only idea was to use a BES and MS Exchange. For various reasons, we'd prefer to avoid Windows and Exchange if possible, which is why we're looking for other solutions.
Thanks for the responses so far! Please let me know if anybody has any other ideas or thoughts.