sendmail, 4th Edition

Two programs need to be executed as root no matter who runs them. One is sendmail (prior to V8.12), and the other is mail.local . Should one or both of these programs have to run as a user other than root , you can redefine the user with this confSBINOWN macro:

define(`confSBINOWN', `nullmail')

Note that this is just half of the solution. You will also need to tune the appropriate F=S delivery agent flag (see F=S for a description of how to do this).