A fix has been implemented and we are monitoring the results.
Posted May 13, 2026 - 22:24 UTC
Identified
The issue has been identified and a fix is being implemented.
Posted May 13, 2026 - 15:30 UTC
Update
We are continuing to investigate this issue.
Posted May 13, 2026 - 14:44 UTC
Investigating
Cloudflare is investigating issues with Email Sending via the Worker Binding where an error message "Invalid email address: Invalid input" can be returned if the recipient list is an array.
More updates to follow soon.
Posted May 13, 2026 - 14:39 UTC
This incident affected: Cloudflare Sites and Services (Email Sending).