Email Gateway Defense - Outbound email to Microsoft Domains is experiencing high deferral rates

Incident Report for Barracuda Networks

Resolved

This incident has been resolved.
Posted Mar 13, 2026 - 13:18 UTC

Identified

We are aware of a problem where outbound email in EGD to Microsoft Domains is experiencing high deferral rates and are currently monitoring the situation.
Posted Feb 25, 2026 - 22:05 UTC
This incident affected: Email Gateway Defense (Mail Delivery).