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I just configured zimbra mail server but mail from my zimbra to yahoo, hotmail etc going into there spam folder any suggestion???

bellow is header part from yahoo of that mail

X-DSPAM-Result: Innocent X-DSPAM-Class: Innocent X-DSPAM-Confidence: 1.00 X-DSPAM-Probability: 0.0023 X-DSPAM-Signature: N/A X-Virus-Scanned: amavisd-new at X-Spam-Flag: NO X-Spam-Score: -5.399 X-Spam-Level:
X-Spam-Status: No, score=-5.399 tagged_above=-10 required=6.6 tests=[ALL_TRUSTED=-1.8, BAYES_00=-2.599, DSPAM:Innocent=-1.000] autolearn=ham

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This is an exact duplicate by the same OP.… – Scott Lundberg Mar 23 '10 at 12:53

Try this Email Server Test. It will tell you what could be wrong and how to fix it.

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Configure reverse lookup in your public DNS, some mail servers check for reverse lookups

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