Substack incident

Post notifications are delayed

Minor Resolved View vendor source →

Substack experienced a minor incident on October 4, 2025 affecting Email delivery and Push Notifications, lasting 4h 22m. The incident has been resolved; the full update timeline is below.

Started
Oct 04, 2025, 04:06 PM UTC
Resolved
Oct 04, 2025, 08:29 PM UTC
Duration
4h 22m
Detected by Pingoru
Oct 04, 2025, 04:06 PM UTC

Affected components

Email deliveryPush Notifications

Update timeline

  1. investigating Oct 04, 2025, 04:06 PM UTC

    We are experiencing delays in sending out email and push notifications for published posts.

  2. identified Oct 04, 2025, 04:25 PM UTC

    The issue has been identified and a fix is being implemented.

  3. monitoring Oct 04, 2025, 07:22 PM UTC

    A fix has been implemented and we are monitoring the results.

  4. resolved Oct 04, 2025, 08:29 PM UTC

    This incident has been resolved.