The use of subject line keywords, which can be individually adapted if required, guarantees the independence from the used email client when controlling the appliance.

Similarly, (X) headers can be evaluated for controlling actions which are to be implemented on the SEPPmail Secure E-Mail Gateway. By default, these X headers are used by the Microsoft Outlook Add-In but can also be set in other email clients, such as IBM Notes, by means of adapted email templates or Novell Groupwise via templates.