Companies / Substack / incidents

Substack: Post emails delayed

Impact: majorStatus: resolvedStarted Resolved (11 h)6 updatesSource: stspg.io (opens in new tab)
Summary

Substack reported a major incident starting 2025-10-20 13:41 UTC, delaying scheduled post emails and partially disrupting publication dashboards, subscriber tabs and statistics. The vendor linked scheduled-post delays to a service-provider outage; manual publishing was a workaround. Scheduled sends recovered and the backlog cleared; the incident resolved at 2025-10-21 00:52 UTC after 11 h 11 min.

Machine-written from the archived incident (Sol). Check the timeline before relying on it.

Affected components: Writer dashboardsEmail deliveryCustom domains

Timeline of updates

  1. investigating

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

  2. investigating

    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

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

  4. identified

    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

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

  6. resolved

    This incident has been resolved.

Rewindex changes for this incident

Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab). Substack profile · Recent Substack incidents · Markdown · JSON