Cloudflare incident

Errors with Email Sending via the Worker Binding

Minor Resolved View vendor source →

Cloudflare experienced a minor incident on May 13, 2026 affecting Email Sending, lasting 14h 9m. The incident has been resolved; the full update timeline is below.

Started
May 13, 2026, 02:39 PM UTC
Resolved
May 14, 2026, 04:48 AM UTC
Duration
14h 9m
Detected by Pingoru
May 13, 2026, 02:39 PM UTC

Affected components

Email Sending

Update timeline

  1. investigating May 13, 2026, 02:39 PM UTC

    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.

  2. investigating May 13, 2026, 02:44 PM UTC

    We are continuing to investigate this issue.

  3. identified May 13, 2026, 03:30 PM UTC

    The issue has been identified and a fix is being implemented.

  4. monitoring May 13, 2026, 10:24 PM UTC

    A fix has been implemented and we are monitoring the results.

  5. resolved May 14, 2026, 04:48 AM UTC

    This incident has been resolved.