Starting at 17:20 UTC on November 12, 2026, Abnormal began experiencing a service disruption affecting Inbound Email Security, AI Security Mailbox, and Graymail for some hosted US and EU customers using Microsoft 365. Affected customers may experience delays in threat detection, removal of malicious emails, processing of reported suspicious emails, and Graymail filtering. Initial findings also indicate that most Inline Microsoft 365 emails routed through Abnormal before delivery are being held up, potentially delaying delivery to recipients. Customers using Google Workspace are unaffected. Abnormal is investigating the issue and will provide further updates as more information becomes available.
Posted Nov 12, 2026 - 10:21 PST
This incident affects: Inbound Email Security (IES), AI Security Mailbox (AISM) and Abnormal Gov (Inbound Email Security (IES)(Fedramp), AI Security Mailbox (AISM)(Fedramp)).