If you are configuring the To, Cc, or Bcc, the Groups menu option is available. You can use the corresponding drop-down list to specify all of th users' email addresses within a certain user group by selecting User Groups and then the appropriate user group name. The <<%G:nameofusergroup>> will be inserted into the field.
Note:
If you are inserted more than one address source, they must be separated by a comma (,).