A message system incorporating electronic mail to a central facility which then assumes responsibility for delivering the message in hard copy form. Note: In DOD, these messages have a specific format known as message text format (MTF).
ELECTRONIC MESSAGE SYSTEM (EMS)
Meaning of ELECTRONIC MESSAGE SYSTEM (EMS) in English
Telecommunication standard terms English vocab. Английский словарь стандартных телекоммуникационных терминов. 2012