Gurus,
What I originally wanted to know was is there a way that I could prevent 
specific users from accessing e-mail. There were several answers to this but 
most were in the agreement that it is almost impossible to prevent a user 
sending e-mail if they are clever enough with a quick fix. You could put all 
users in a group that is allowed to access e-mail and simply remove those users 
from this group that are to be barred. The problem with this method is that is 
very time consuming to implement and keep up to date. There are also features 
available in Sendmail 8 which can also be adapted for this function. Or the 
best solution came from Brain Wood which was to charge users $10 for every 
letter sent so reducing traffic to almost 0.
   To prevent users reading e-mail can be done in a number of ways. You can add 
aliases to send all their mail to /dev/null or simply just change the 
permissions of their mailbox file which stops them reading any mail sent to 
them. 
*****************************************************
*  Mark Tindall, Senior Systems Officer             *
*                                                   *
*  London Guildhall University,                     *
*  100 Minories,                                    *
*  Tower Hill,                                      *
*  London EC3N 1JY.                                 *
*                                                   *
*  Tel: 0171-320 1737                               *
*  Email: tindall@lgu.ac.uk                         *
*****************************************************
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