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 reputations of their domains and to identify the infrastructure used by malicious actors.

Data and Resources

Additional Info

Field	Value
Last Updated	April 17, 2026, 22:03 (UTC)
Created	April 17, 2026, 22:03 (UTC)
contact_email	opengov-gouvouvert@cse-cst.gc.ca
criticality_level	[]
geographic_scope	[]
open_canada_collection	publication
open_canada_date_published	2021-08-31 00:00:00
open_canada_keywords	{"fr": ["protection du domaine de courrier"], "en": ["email domain protection"]}
open_canada_subject	["education_and_training", "information_and_communications", "science_and_technology"]
sensitivity_level	unrestricted
title_fr	Directives de mise en œuvre - protection du domaine de courrier (ITSP.40.065 v1.1)
update_frequency	not_planned