[rpfeffer]

Update on our blackberry issue with not being able to send from Exch2010 to 2003...

Apparently it was only one information store having the problem. Everything works fine except for one mailbox store. We moved my account today to a new store and mail flow is 100% functional. Moving all of the mailboxes in this store isn't really an option, but more of a last resort. Aside going back through the permissions (that look to be correct as it is), any other ideas? Other stores in the same storage group are completely fine and recieve/send mail from 2010 blackberry devices with no problems.

Doesn't really make sense, but at least we now know its an issue specific to a single mailbox store.