Substack incident

Post emails delayed

Resolved after 11 hours 11 minutes, affecting Email delivery, on October 20, 2025.

monitoring Oct 20, 2025, 09:50 PM UTC

Scheduled post sends are operational and we have caught up with the backlog.

Started
Oct 20, 2025, 01:41 PM UTC
Resolved
Oct 21, 2025, 12:52 AM UTC
Duration
11h 11m
Detected by Pingoru
Oct 20, 2025, 01:41 PM UTC

Affected components

Email delivery

Update timeline

  1. investigating Oct 20, 2025, 01:41 PM UTC

    We are experiencing delays with processing scheduled posts related to an outage from one of our service providers. Our team is investigating.

  2. investigating Oct 20, 2025, 01:49 PM UTC

    We are also seeing issues with publication dashboards including partial outages across the subscriber tab and some statistics. We are working to mitigate.

  3. identified Oct 20, 2025, 02:12 PM UTC

    We are seeing recovery of our publisher dashboard functionality. Other service functions such as scheduled posts continue to be degraded.

  4. identified Oct 20, 2025, 04:51 PM UTC

    We continue to experience delays with processing scheduled posts related to an outage from one of our service providers. Users can publish posts manually to bypass this. Our team is still investigating.

  5. monitoring Oct 20, 2025, 09:50 PM UTC

    Scheduled post sends are operational and we have caught up with the backlog.

  6. resolved Oct 21, 2025, 12:52 AM UTC

    This incident has been resolved.

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