DMARC Email Security: Protect Your Domain from Spoofing and Phishing

  Introduction: Microsoft 365 and the Email Security Illusion Microsoft Office365 is trusted by millions of organizations worldwide. From small businesses to Fortune 500 giants, it’s the go-to suite for communication and collaboration. But when it comes to email protection, many believe that Office365 has it all covered. Unfortunately, that belief can be a trap. While Microsoft does offer robust email filtering and anti-malware protection, there’s one layer it doesn’t automatically enforce: domain-level email authentication. And that’s where the story of DMARC begins. Chapter 1: Email’s Oldest Vulnerability Email was never designed with security in mind. It’s like a postcard — anyone can read it, and worse, anyone can fake the sender. This flaw has been exploited for decades by cybercriminals through spoofing and phishing. Even within secure environments like Office365, bad actors can forge emails that appear to come from your organization. These impersonated emails bypass fi...