OT - How to test procmail on existing mailbox

[Andrew Robinson]

I want to use fetchmail and procmail to download and sort my email. I am 
in the initial testing phase. I've downloaded a bunch of mail to my 
system mailbox with fetchmail. I have written some recipes for procmail. 
Can I get procmail to run against the mail already downloaded in 
/var/spool/mail/andrew? If so, how?

Thanks!

Andrew Robinson