You can create a subaccount at any time in the Transactional Email web interface or via the Transactional API. To create a new subaccount, follow these steps.
- Go to the Outbound section of your Transactional Email account.
- Click Subaccounts.
- Create a Subaccount.
- Choose a unique identifier for the subaccount such as a unique id from your own application or database. You cannot change the identifier once the subaccount has been created.
- Click Create Subaccount.
After you create a subaccount, you can view activity for the subaccount, set a custom quota, or delete the subaccount.
Send Email From a Subaccount
To send email from a specific subaccount, use the subaccount option (API), X-MC-Subaccount (SMTP).
The subaccount must exist when using either of these options. If you attempt to send an email from a subaccount that doesn't exist via the Transactional API, it will fail with an error. If you attempt to send an email from a subaccount that doesn't exist via SMTP, the email will be accepted by the SMTP server but ultimately fail to send.