You were sent a group email from http://10.20.4.204/ecgnet/.

Mail System Settings Drupal provides a default MailSystemInterface class called DefaultMailSystem. Modules may provide additional classes. Each MailSystemInterface class may be associated with one or more identifiers, composed of a module and an optional key.
Each email being sent also has a module and a key. To decide which class to use, Drupal uses the following search order: The class associated with the module and key, if any. The class associated with the module, if any. The site-wide default MailSystemInterface class.