Fastmail - Status

Identified
February 13, 2026 at 8:30 PM
Identified
February 13, 2026 at 8:30 PM
We’ve noticed that a small percentage of emails sent to Outlook-hosted addresses are being affected again. We’re in touch with Microsoft and working with them to resolve it.
Monitoring
February 05, 2026 at 12:00 PM
Monitoring
February 05, 2026 at 12:00 PM
Microsoft has addressed this issue and we believe the is now resolved. We continue to monitor.
Identified
January 27, 2026 at 4:30 AM
Identified
January 27, 2026 at 4:30 AM
A recent Microsoft update is sometimes incorrectly flagging some emails from several providers, including Fastmail. This is causing intermittent delivery issues for some email sent to addresses hosted on outlook.com. We are seeing a small percentage of outgoing mail affected, with no obvious reason as to why. Our team is actively working with Microsoft's email team to get this resolved as soon as possible.

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