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I have a similar issue: I cannot delete any mail from my Windows Live Mail hotmail account. Mail downloads without a problem, but delete does nothing. When I go to empty the junk folder, the messages seem to disappear but an error message comes up. I didn't change any settings before these issues ocurred a week ago. I have tried your instructions as above but this did not help. I have also removed the account and then added it as a new account but still have the same issue. Is it simply a configuration problem? If so, what should the settings be for a hotmail account please?