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Apple Mail frequently shows incoming messages in the Mail Activity window, but nothing will arrive in my inbox or any folders. Am I missing messages?
I'm now using OS X 10.6.3, Mail 4.2 but this also happened with OS X 10.5.8/9.
Should I be worried?
Welcome to SuperUser. We pride ourselves on answers that provide enough detail to allow anyone to read them and solve the problem from the answer. Please expand your answer to include a few more details. – David – 2014-05-27T15:26:06.640