[14] WHERE IS PROCMAIL LOCATED ON THIS SYSTEM?

     The procmail executable is located on the mailserver.  You will not
     be able to access it via an NFS client and it should only be called
     from your .forward file similarly to this:

     "|exec /usr/pkg/bin/procmail -f-||exit 75 #$LOGNAME"

     For best performance and less of a burden on shared resources it
     is asked that you only do mail processing in /tmp or in $MAILDIR.

     Do not process mail in your home directory.  Calling procmail from
     or performing mail processing on an NFS mount can sometimes result 
     in data loss.