MailGuard 365

Co-built with Microsoft, MailGuard 365 is the world’s first fully integrated email security solution within Microsoft 365, stopping advanced threats on first encounter – including those that bypass Microsoft and other vendors. MailGuard 365 was purpose-built to detect and intercept advanced email threats faster than Microsoft Defender and other 3rd party post-delivery tools. In an age of AI-powered threats, speed is security. The evidence is real-world: MailGuard 365 detected QR phishing, Dropbox-based credential theft, and Microsoft Entra Guest Invite exploits on first encounter — often months before Microsoft 365 and others – backed by Microsoft metadata. A global specialist in 'zero zero-day' email security, MailGuard 365 is Special Ops for when speed matters. Our real-time AI-powered email threat detection amplifies our clients' intelligence, knowledge, security and defense. Seamless and fully integrated inside Microsoft 365, it’s activated with your Microsoft credentials, billed directly by Microsoft, and its native integration means no user training is required. Emails are protected instantly, with evidence-based reports showing the threats that have been successfully stopped. All with zero training required for end users and admins. A cloud-based email security solution, it was co-built by MailGuard with the team at Microsoft to enhance the security of 345 million Microsoft 365 users. Hours faster in threat detection, it adopts a ‘Better Together’ approach, combining over two decades of specialist cloud email security expertise from MailGuard, with the best of Microsoft. Exclusive to Microsoft, it delivers enhanced protection against advanced email threats like phishing, ransomware and BEC attacks. In an era of rising cyber regulation and board-level accountability, MailGuard 365 enhances your Microsoft 365 security stack with zero disruption, instant activation, and elite-speed protection — fulfilling your fiduciary and operational responsibilities.