Custom Domain Email Delivery Issues

At 12/14/2025 3:00 AM PT, the Okta Engineering team became aware of an intermittent issue with email being sent through Custom Email Domains. This is affecting customers in US Cell 1, US Cell 2, US Cell 3, US Cell 4, US Cell 6, US Cell 7, APJ Cell 1, EMEA Cell 9, US Cell 11, US Cell 12, US Cell 14, JP Cell 16, US Preview 1, EMEA Preview 2, US Preview 3, EMEA Cell 1. Our team is actively investigating this issue and working with our third-party vendor to address the issue. We will provide another update within the next 30 minutes, or sooner if additional information becomes available.