Legacy API users may have experienced an issue where test results were not created when sending to the unique Litmus test address provided via the API. This issue may have affected tests sent from 2PM EST on January 9th through 12PM EST on January 10th. This issue is now resolved.
We monitor our systems by performing live email and web page tests constantly. Additionally, we measure the response time of the Litmus application and our Email Analytics platform from different locations.