Outage in Substack

Post emails delayed

Resolved Major
October 20, 2025 - Started about 22 hours 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 about 11 hours ago - at 10/21/2025 12:52AM

This incident has been resolved.

MONITORING about 14 hours ago - at 10/20/2025 09:50PM

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

IDENTIFIED about 19 hours 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 about 21 hours 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 about 22 hours 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 about 22 hours 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.

Latest Substack outages

Post notifications are delayed - 17 days ago
Post email delivery is delayed - about 1 month ago
Substack experiencing increased latency - about 1 month ago
Delay in sending scheduled posts - about 2 months ago
Livestream creation not working - about 2 months ago

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