pm-doc

Hi,
    i am very new to procmail and trying to implement it together with sendmail 
to restrict user's mailbox quota. Where can i get the latest version 
(www.procmail.org seems to have changed to a Gustavus Adolphus College page) 
and also a step by step howto on implementing this together with sendmail. Need 
it urgently for my internal mail server. Thanks

Daniel