Post emails delayed

What to do

• Check whether you use Substack Email delivery. Check your stack

  Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.

• Confirm your retries, queues and scheduled jobs caught up after the 11h 11m it lasted.

  Anything that failed between 2025-10-20 13:41 UTC and 2025-10-21 00:52 UTC may need a replay.

• Subscribe to Substack's feed to hear about the next one first. RSS feed

  https://down.guide/feed?provider=substack works in Slack (/feed subscribe), Discord feed bots and any RSS reader.

Updates from Substack 6

1. investigatingOct 20, 2025, 1:41 PM UTC

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

   provider

2. investigatingOct 20, 2025, 1:49 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.

   provider

3. identifiedOct 20, 2025, 2:12 PM UTC

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

   provider

4. identifiedOct 20, 2025, 4:51 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.

   provider

5. monitoringOct 20, 2025, 9:50 PM UTC

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

   provider

6. resolvedOct 21, 2025, 12:52 AM UTC

   This incident has been resolved.

   provider

Corrections

None so far.

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