Implementation Guidance: Email Domain Protection

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 sent on behalf of their domains and identify the infrastructure used by malicious actors.

Data and Resources

Additional Info

Field	Value
Last Updated	April 17, 2026, 19:24 (UTC)
Created	April 17, 2026, 19:24 (UTC)
criticality_level	["business", "government"]
geographic_scope	[]
open_canada_collection	publication
open_canada_date_published	2020-04-08 00:00:00
open_canada_keywords	{"fr": ["cyberdéfense", "systemes d'exploitation et applications", "gestion des risques"], "en": ["cyber defence", "operating systems and applications", "risk management"]}
open_canada_subject	["information_and_communications", "science_and_technology"]
sensitivity_level	unrestricted
title_fr	Directives de mise en œuvre - protection du domaine de courrier
update_frequency	not_planned