Substack experienced a notice incident on August 30, 2025 affecting Email delivery, lasting 15m. The incident has been resolved; the full update timeline is below.
Affected components
Email delivery
Update timeline
- identified Aug 30, 2025, 04:17 PM UTC
We are investigating a delay in the sending of scheduled posts.
- monitoring Aug 30, 2025, 04:30 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Aug 30, 2025, 04:32 PM UTC
This incident has been resolved.