If my AWS region is different from the AWS region used for ACD email, where is my ACD email data stored?

In some cases, the AWS region used for ACD email differs from the corresponding AWS region. Regardless, email processing and data storage occurs in the AWS region. The email simply passes through the AWS region for ACD email. For example, your organization’s AWS region is ap-northeast-1 and the corresponding AWS region used for ACD email is us-east-1. When a user in your organization sends an email, it passes through us-east-1, but the email processing and data storage takes place in ap-northeast-1.