Microsoft's Closed Push?
Now, I'm not big on Microsoft conspiracy theories, but it does seem that this could be part of a larger, behavioral pattern on Redmond's part. If you click on over to our sister security site Dark Reading you'll see that security vendors have been complaining for a while about getting limited access to the security kernel of Microsoft's new Vista desktop OS. (See Symantec Spurns Microsoft’s Vista Security Proposal and Microsoft's Vista Changes Could Backfire on Disgruntled Rivals.) In fact, Microsoft eventually agreed to open up the kernel just a little earlier this month. (See Microsoft Opening Up Vista Kernel to Security Vendors.)
Now it appears that something similar could be happening on the mobile side of the house. If so, I have to say it's probably not the greatest idea ever. In fact, it may just encourage mobile users to stick with what they know, which would be the BlackBerry email server.
— Dan Jones, Site Editor, Unstrung