Could be the default when neither opt-in nor opt-out is passed in the parameters.
- Create a basic template under email_forms
- Add logic to call CiviProxy using helper class from T268497
- Add any missing params for info gained from CiviProxy to EmailForm.php
- Add title string to i18n and add new case in setPageTitle
- Add logic to validate submission and send message to queue set up in T268512