Semi OT: procmail recipe question

[Vermyndax]

I am running SpamAssassin through /etc/procmailrc... but I would like 
procmail to avoid piping through SpamAssassin if the mail is addressed 
to the quarantine user.

I wrote what I thought was the correct recipe, but apparently I'm 
mistaken as the mail is still piped through SpamAssassin for the 
quarantine user:

:0fw
* !^To:[EMAIL PROTECTED]
| /usr/bin/spamc -f -u $1
Could anyone tell me what I've done wrong?
Thanks...
--JM