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Why does BlackBerry® Internet Service Email v2.0 support only 1-way synch?

April 26, 2017email internet service support synch

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Why does BlackBerry® Internet Service Email v2.0 support only 1-way synch?

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1-way synch is a low cost operation, from a system utilization and band width perspective. When a user marks a message as read, the device queues similar requests for 5 minutes, and sends the request to BlackBerry® Internet Service Email. BlackBerry® Internet Service Email in turn logs into the email account and knows the specific messages to apply the state changes to.