Postmark incident

Email Sending Delays

Major Resolved View vendor source →

Postmark experienced a major incident on June 4, 2026, lasting 3h 46m. The incident has been resolved; the full update timeline is below.

Started
Jun 04, 2026, 08:50 PM UTC
Resolved
Jun 05, 2026, 12:36 AM UTC
Duration
3h 46m
Detected by Pingoru
Jun 04, 2026, 08:50 PM UTC

Update timeline

  1. investigating Jun 04, 2026, 10:39 PM UTC

    We are experiencing email sending delays due to degraded system performance. Mail is still being accepted into the system.

  2. investigating Jun 04, 2026, 11:39 PM UTC

    A fix has been deployed and sending has resumed. We are processing the backlog of messages.

  3. resolved Jun 05, 2026, 12:36 AM UTC

    The backlog of messages have been sent and system performance has returned to its expected state. Sending delays occurred between 4:50 – 6:35pm CT (21:50 – 23:35 UTC) for both transactional and broadcast mail. Engineering will continue to monitor.