Amazon SES now supports IPv6 when calling SES outbound endpoints

Today, Amazon [Simple Email Service](https://aws.amazon.com/ses/) (SES) launched support for connecting to SES outbound sending endpoints over IPv6\. Customers can now specify their preference for IPv4 or IPv6 endpoints when using the AWS SDK or CLI. This makes it easy to switch from using IPv4 addresses to IPv6 addresses when communicating with the SES services for outbound sending. Previously, customers could use the AWS SDK or CLI to connect with SES endpoints for outbound sending. These connections always used IPv4 addresses when creating TCP/IP connections for communication with the SES service. Now customers can specify their preference for dual-stack using an environment variable or command line argument. The AWS SDK and CLI will use this information to specify the address type when connecting to the SES service API endpoint. SES supports IPv6 addresses when connecting to SES endpoints for outbound sending in all [AWS Regions](https://aws.amazon.com/about-aws/global-infrastructure/regional-product-services/) where SES is available. For more information, see the documentation on using [dual stack endpoints](https://docs.aws.amazon.com/sdkref/latest/guide/feature-endpoints.html) with AWS services.