The Transmissions API endpoint for some customers in the US will be undergoing scheduled maintenance as we perform architecture upgrades gradually from Oct. 26th to Nov. 11th. These upgrades will provide increased reliability and a uniform experience. As a result of these upgrades, customers will begin to see the following changes in the Transmissions API for their REST Transmissions:
- Single-Recipient transmissions will return content validation errors asynchronously
- The description field will not longer be returned on error
At the end of this maintenance window, these changes will be in effect for all customers. A full description of these changes can be found at https://www.sparkpost.com/docs/tech-resources/transmissions-breaking-changes/
. Please submit a support case via the app or reach out to your Technical Account Manager if you have any questions regarding this change. Thank you for your patience as we work to improve our email service.