RESOLVED: We're investigating reports of an issue with Gmail. We will provide more information shortly.

The Gmail application for iOS experienced increased crash rates from October 18, 2024, 18:30 UTC to October 20, 2024, 00:15 UTC. The issue lasted for 1 day, 5 hours, and 45 minutes, affecting approximately 2.6 million users. The root cause was a server-side feature release that introduced a formatting mismatch between normalized and non-normalized email addresses. This mismatch caused the Gmail iOS application to crash when trying to match account IDs to email addresses. Google engineers were alerted to the issue on October 18, 2024, at 11:58 US/Pacific and immediately started an investigation. To mitigate the impact, engineers rolled back two recent updates to identity endpoints used by Gmail iOS on October 19, 2024, at 17:15 US/Pacific. Google is taking steps to prevent a repeat of this issue, including making Gmail iOS more resilient to identity endpoint changes and limiting these changes to in-scope users. The impact was limited to the Gmail application for iOS, and users did not experience errors on other platforms, including Android and web interfaces. Google apologizes for the inconvenience and is committed to improving the platform's performance and availability. The affected product was Gmail for iOS.