• Rejecting hosts sending Invalid HELO or missing RDNS

    worawatlambenmud
    worawatlambenmud
    Is anyone know how Sophos Email Appliance v4.1.1.0 can filter RDNS to quarantine or reject if require when the record is wrong. I cannot find any option in Email Appliance that can filter RDNS, like SPF or DKIM. I also try from HEADER Attribute [Policy…
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    • over 7 years ago
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