Fastmail incident

Intermittent outbound delivery issues

Minor Resolved

Fastmail experienced a minor incident on May 27, 2026 affecting Mail delivery, lasting —. The incident has been resolved; the full update timeline is below.

Started
May 27, 2026, 10:24 PM UTC
Resolved
May 27, 2026, 10:24 PM UTC
Duration
—
Detected by Pingoru
May 27, 2026, 10:24 PM UTC

Affected components

Mail delivery

Update timeline

  1. investigating May 25, 2026, 05:19 AM UTC

    Identified a problem causing intermittent outbound delivery issues affecting some users.

  2. resolved May 28, 2026, 12:30 AM UTC

    We identified a problem which caused intermittent outbound delivery issues leading to some users experiencing deferrals or bounce backs. We have remediated the problem. No mail has been lost.

  3. resolved May 28, 2026, 01:00 AM UTC

    We identified a problem which caused intermittent outbound issues leading to some users experiencing deferrals or bounce backs. We have remediated the problem. No mail has been lost.