Outage in Cloudflare
Errors with Email Sending via the Worker Binding
Resolved MinorIncident Report
Summary AI Generated
Cloudflare experienced issues with Email Sending via the Worker Binding where users received "Invalid email address: Invalid input" errors when the recipient list was formatted as an array. The problem affected email functionality for workers using array-formatted recipient lists over a 14.2 hour period. Cloudflare identified the root cause and implemented a fix, which is currently being monitored.
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.
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Latest Updates ( sorted recent to last )
MONITORING
24 days ago - at 05/13/2026 10:24PM
A fix has been implemented and we are monitoring the results.
IDENTIFIED
25 days ago - at 05/13/2026 03:30PM
The issue has been identified and a fix is being implemented.
INVESTIGATING
25 days ago - at 05/13/2026 02:44PM
We are continuing to investigate this issue.
INVESTIGATING
25 days ago - at 05/13/2026 02:39PM
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.
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