[sylpheed:35960] using sylfilter with procmail

[Globe Trotter]

Does anyone has any experience using procmail with sylfilter. I have looked around for examples but (almost?) all have to do with bogofilter which actually inserts a X-Bogosity level value in the header that is then used to classify mail. How do I set  this up for sylfilter in my .procmailrc?

So, here is what I want to do:

let procmail prcess the e-mail using syslfilter. If identified as "junk", then send it to $Mail/junk/. otherwise continue processing (deliver to my inbox).

I tried including the following (following a post I saw online):

:0 Wc
| /usr/local/bin/sylfilter /dev/stdin
:0 a
$HOME/Mail/junk/.


but it does not do anything. My procmail log file however, has an entry of 

No input file
for every e-mail processed (before it goes on to process further).


Any suggestions?

Thanks a bundle!
Trotter