iPhone owners plagued by broken email fetch

"Dozens of users in Apple's support forums note that Mail in version 2.1 appears to drop frequent mail checks regardless of whether the device is set to fetch messages on a schedule or to push mail in real time. As a result, these users often don't receive e-mail until they check manually. They discovered that the issue seems directly tied to the power state of iPhones. As long as the handset is active or plugged into a power source, it continues to receive mail at whatever rate its email settings would dictate. In a user's pocket, however, the phone appears to stop checking altogether until it's woken for use."

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