Substack incident
Dropping email open rates due to Apple iCloud Private Relay outage
Substack experienced a minor incident on July 25, 2024, lasting —. The incident has been resolved; the full update timeline is below.
Update timeline
- resolved Jul 29, 2024, 11:19 PM UTC
We’ve investigated a trend of dropping email open rates for a subset of publishers since 7/25. We believe this is due to the outage with Apple’s iCloud Private Relay from 7/25 — 7/27, and that this doesn't reflect an actual change in opens.