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.
Trusted by 1,000+ teams
Never miss outages in third-party dependencies
Stop finding out about outages from your users. Monitor 6,320+ cloud services and get alerted the second something breaks.
Latest Updates ( sorted recent to last )
MONITORING
about 12 hours ago - at 05/13/2026 10:24PM
A fix has been implemented and we are monitoring the results.
IDENTIFIED
about 19 hours ago - at 05/13/2026 03:30PM
The issue has been identified and a fix is being implemented.
INVESTIGATING
about 20 hours ago - at 05/13/2026 02:44PM
We are continuing to investigate this issue.
INVESTIGATING
about 20 hours 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.
Latest Cloudflare outages
Cloudflare Dashboard and API service issues - about 11 hours ago
Browser Run API availability issues - about 15 hours ago
Increased HTTP 502 Errors in Hong Kong region - about 20 hours ago
Increased HTTP 502 Errors in San Jose, CA, United States region - about 20 hours ago
Network Route Leak - 1 day ago
Never miss outages in third-party dependencies
With IsDown, you can monitor all your critical services' official status pages from one centralized dashboard and receive instant alerts the moment an outage is detected. Say goodbye to constantly checking multiple sites for updates and stay ahead of outages with IsDown.
Start free trialNo credit card required · Cancel anytime · 6320 services available
Integrations with
