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I have setup a new Zimbra Open Source installation. This is a new email server and the IP of this server is not Black listed in most prominent Block Lists. But what ever I have tried the emails still end up in the Spam folder. The headers which I received in my gmail account is as given is as below

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Full marks for providing relevant information in the question! Its the nature of spam detection that most companies are cagey about publishing information about how they detect spam - and in the case of bayesian filtering they may not even know! Have you tried the Gmail bulk sender guidelines? – symcbean Nov 18 '10 at 14:40
Yup tried that. But no hope. – user60699 Nov 18 '10 at 15:14

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