Outage in Substack

Post emails delayed

Resolved Major
October 20, 2025 - Started 2 months ago - Lasted about 11 hours
Official incident page

Incident Report

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

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Latest Updates ( sorted recent to last )
RESOLVED 2 months ago - at 10/21/2025 12:52AM

This incident has been resolved.

MONITORING 2 months ago - at 10/20/2025 09:50PM

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

IDENTIFIED 2 months ago - at 10/20/2025 04:51PM

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.

IDENTIFIED 2 months ago - at 10/20/2025 02:12PM

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

INVESTIGATING 2 months ago - at 10/20/2025 01:49PM

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

INVESTIGATING 2 months ago - at 10/20/2025 01:41PM

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

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