The Sender mailbox  specification  includes  a  word  sequence
    which  must correspond to a specific agent (i.e., a human user
    or a computer program) rather than a standard  address.   This
    indicates  the  expectation  that  the field will identify the
    single AGENT (person,  system,  or  process)  responsible  for
    sending  the mail and not simply include the name of a mailbox
    from which the mail was sent.  For example in the  case  of  a
    shared login name, the name, by itself, would not be adequate.
    The local-part address unit, which refers to  this  agent,  is
    expected to be a computer system term, and not (for example) a
    generalized person reference which can  be  used  outside  the
    network text message context.
    Since the critical function served by the  "Sender"  field  is
    identification  of  the agent responsible for sending mail and
    since computer programs cannot be held accountable  for  their
    behavior, it is strongly recommended that when a computer pro-
    gram generates a message, the HUMAN  who  is  responsible  for
                              ------------------------------------
    that program be referenced as part of the "Sender" field mail-
    ------------
    box specification.
 
Who is accountable for a list? The list owner.