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ACM Validation Domain

Sending validation emails to apex domain for subdomain requests.

The release of AWS Certificate Manager has been a fantastic resource for zero cost issuance and management of SSL/TLS certificates for use in your AWS environments. As per the ACM marketing collateral: With AWS Certificate Manager, you can quickly request a certificate, deploy it on AWS resources such as Elastic Load Balancers or Amazon CloudFront distributions, and let AWS Certificate Manager handle certificate renewals. SSL/TLS certificates provisioned through AWS Certificate Manager are free.