System Mailbox and zero byte files.

        Procmail is very effective for the directory tree of users on my 
system. 
My problem arises from the fact that I keep getting 0 byte files for the
user's id in /var/mail.  Unfortunately this will cause the /var/mail
directory to grow to an unacceptable size (In excess of 50,000 files 0 byte
files).
        Is there anyway to change the System mailbox???  Am I missing a rule set
or do I need to hack the code?


        Thanks in advance.


                                                        
flatline(_at_)bc(_dot_)sympatico(_dot_)ca