Option: XMASSUME

This option allows the user to act as a surrogate for another user
You may assume the identity of a special user, 'SHARED,MAIL',
to read messages of general interest.  You will be able to read and
respond to messages there, but you will not be able to send any.
If you have been given the XMNOPRIV key, you will not be able
to access 'SHARED,MAIL'.
SHARED,MAIL is a place to send messages of general interest.
Almost all users may access this area.  When you send messages to
SHARED,MAIL, you must indicate a BASKET to deliver the messages to
so that helps others find yours.
or for SHARED,MAIL.
Do not create new BASKETS unless it is really necessary.
Try to fit your message into a basket that already exists.  SHARED, MAIL
is a LIBRARY, NOT a repository for trivial or personal communications.
Please respect your privilege to be SHARED,MAIL surrogate.
The PRIVILEGE to be a SURROGATE of SHARED,MAIL may be taken away.
Before you can act as a surrogate for another user, that user must
indicate permission by granting you surrogate privileges through
his USER OPTIONS EDIT.  You will then be able to read, answer, and
send mail for that user, depending on the level of access (read/write)
that you were granted.