The following are instructions from ITS on how to add or remove yourself from class mailing lists:
A MAILSERV distribution list has been created for this class.  The name is
of the form DDD-CCC-SS-TERM, where DDD is the department number of your
course,  CCC is the course number, SS is the section number, and TERM is
the current semester (FALL, SPRING, or SUMMER).  The list members include
yourself (as the "owner") and the students who were registered for the
class at the time the list was created.  It is a private list (only the
list members may post to it) and has open subscription.  Late registrants
may add themselves to your list by sending a message to mailserv@uni.edu
where the *body* contains these two lines:  
        SUB ddd-ccc-ss-term 
        END 
In a similar manner, students who drop the course may remove themselves
from your list by sending a message to mailserv@uni.edu where the *body*
contains these two lines: 
        UNSUB ddd-ccc-ss-term 
        END 
Alternatively, you may do this for your students by following the
directions shown below.