Terraform SNS Subscription Multiple Emails

Question

What does the formatting of multiple email addresses for the aws_sns_topic_subscription Terraform resource look like?

resource "aws_sns_topic_subscription" "target" {
  topic_arn = aws_sns_topic.some_sns_topic.arn
  protocol  = "email"
  endpoint  = "aaa@gmail.com,bbb@gmail.com"
}

I've tried many combinations for the endpoint parameter:

endpoint  = "aaa@gmail.com,bbb@gmail.com"
endpoint  = "aaa@gmail.com", "bbb@gmail.com"
endpoint  = ["aaa@gmail.com", "bbb@gmail.com"]

I've found nothing online or in the Terraform docs on how to do this. Thanks in advance.

Answer 1

endpoint accepts only one email address if the protocol is email type.

If you have multiple email addresses, you may want to use for_each to create a subscription for each address.

resource "aws_sns_topic_subscription" "target" {
  for_each  = toset(["aaa@gmail.com", "bbb@gmail.com"])
  topic_arn = aws_sns_topic.some_sns_topic.arn
  protocol  = "email"
  endpoint  = each.value
}