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  1. D

    Plesk 12 postfix smtp suddenly started issuing relay access denied on all recipients

    I am having the same problem. I have gone through every support article that came up when I searched the error message. That means I've done the mchk program. I've checked that the service is running. I've changed the domain -u <domain.ext> --mail_service false/true, etc. What next? Why...
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