RCS issues a high volume of emails, and uses a number of mechanisms to do this, one of which is email templates.
A template is a standard format email that is used for a specific purpose. It has a Sender and Reply to address, and may optionally have a standard Salutation and/or Signature.
A template may additionally have a list of standard recipients of the email e.g. if it is a system alert.
The software that uses the alerts provides all data not already in the template, including:
Subject
Message body
Recipient(s)