Email Address Format

Stax-managed AWS accounts require email addresses. It is important to ensure that these addresses adhere to both AWS and Stax requirements.

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If your AWS account ownership model is a model with any customer-owned AWS accounts, Stax requires an email address template to be specified as part of onboarding. The email address template must provide room for a Stax-generated account identifier in the format of a UUID.

The recommended email address format is aws+${Stax::AccountId}


The following placeholders can be used as part of the email address template:

${Stax::AccountId}Mandatory. The Stax-generated UUID for the AWS account7e196280-1157-45e3-824a-9f6aef9946b8
${Stax::StaxOrgAlias}Optional. The organization ID of the account's Stax tenancyyour-company


When determining the template for your organization, consider the following limitations:

  • AWS limits the maximum length of these email addresses to 64 characters
  • The UUID generated by Stax has a length of 36 characters, leaving 28 characters for other parts of the email address
  • The UUID generated by Stax will not be known ahead of time, so using something like the convention of SMTP sub-addressing supported by many vendors is encouraged (Microsoft 365, Gmail)
  • AWS account number is unable to be used in the email address template because the email address must exist before the account can be created

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