Amazon Simple Email Service (Amazon SES) authentication has been updated to support IAM Role authentication, offering a more secure and simplified way to authenticate without long-lived access keys. This method reduces the risk of credential leakage and simplifies credential management by using temporary, automatically rotated credentials. Courier now supports this new authentication method, aligning with existing security practices in AWS infrastructure. The update enhances security with temporary credentials and simplifies credential management, making it an ideal option for teams prioritizing security and operational efficiency.