Postmark experienced a major incident on September 22, 2026, lasting 20m. The incident has been resolved; the full update timeline is below.
Update timeline
- resolved Sep 24, 2026, 07:49 PM UTC
A subset of messages accepted between 2:15 pm and 2:35 pm EDT on September 22 (18:15 – 18:35 UTC) were held in queue due to a processing issue instead of being delivered immediately. Those messages were fully processed and delivered at 3:38 pm EDT on September 24 (19:38 UTC). No messages were lost. Messages accepted outside of this 20-minute window were not affected and were delivered normally. If you have questions about a specific message, please reach out to us at [email protected].