After upgrading to the latest version of the Blackberry OS I was testing out several features and I found I could not send email from my Blackberry. It said my service was blocked. I do not send email from my Blackberry very often but I would like that option to work if I needed to use it so I called T-Mobile support yesterday. They recommended that I modify my installation since I should be using the webclient access rather than the enterprise access. That fixed other problems I was seeing. When she asked me to go into the service book and remove the desktop CMIME that fixed the service blocked problem.