Communications Security Establishment Canada

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email domain protection  Open Information 
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    Implementation guidance: email domain protection (ITSP.40.065 v1.1)

    This document provides guidance to system owners on implementing technical security measures to protect their domains from email spoofing. In this document, we describe technical measures that system owners can implement to prevent the delivery of certain malicious messages that are abusing the...
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    Communications Security Establishment Canada
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