Mailgun Outage History

Mailgun experienced a major incident causing delayed email sending in the EU region, affecting both outbound delivery and API services for 3.7 hours. The issue was identified and a fix was implemented after multiple investigation phases. The incident was fully resolved with continued monitoring to ensure service stability.

Mailgun experienced an issue where customers creating domains with Automatic Sender Security had CNAME records provisioned without the corresponding TXT records for DKIM keys. The Control Panel was affected for 27.1 hours, preventing proper email authentication setup for new domains. The issue was resolved after implementing a fix and monitoring the results.

Mailgun experienced elevated timeouts in their Email Validation service for 33 minutes. The issue was identified and a fix was implemented to restore normal validation response times. The incident was resolved after monitoring confirmed the fix was successful.

Mailgun experienced a major incident where customers making HTTPS requests to the API without Server Name Indication (SNI) enabled received expired SSL/TLS certificates, causing certificate validation failures. The issue affected the API service and prevented these clients from successfully connecting to Mailgun's services. The problem was identified, fixed, and fully resolved after 1.9 hours of downtime.

Mailgun's Messages API endpoint in the US region experienced elevated 500 errors for 14 minutes, preventing users from successfully sending messages through the API. The issue was quickly identified and resolved with a fix implemented within 5 minutes of identification. Normal API functionality was restored and confirmed through monitoring.

Mailgun's API in the US region experienced elevated 401 authentication errors, causing some requests to incorrectly fail. The issue affected API functionality for 10 minutes before a fix was deployed and systems returned to normal operation.

Mailgun experienced intermittent API errors in the US region for 1.4 hours, affecting the API component and preventing normal service functionality. The issue was identified and a fix was implemented, with the incident being fully resolved after a monitoring period.

Mailgun experienced intermittent email validation errors affecting their API and Email Validation services for 2.6 hours, with domain verification also impacted by increased failure rates. The engineering team identified the issue and implemented a fix, resolving the incident after monitoring the results.