Mails stay in /var/spool/mail, without being forwarded

[T o n g <mlist4suntong@yahoo.com>]

Hi,

I use sendmail as the default MTA, and have ~/.procmailrc for filtering 
my mails. 

However, in my newly installed system (Lenny), my mails stay in /var/
spool/mail without being forwarded. 

How should I fix it? Do I need that .forward file?

My setting has been working fine for many years. E.g., comments from 
comp.os.linux.misc:

"asuming sendmail is the default MTA... You don't need a .forward 
file, .procmailrc is enough"

"Most Linux systems are set up to use procmail as the local delivery
agent by default, so you should not have to set up a .forward." 

Or there is something else? 

thanks

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