Procmail receipe question

I am trying to block messages from people that I have banned from my 
list.  I get subscriptions and the emails are in the BODY ONLY.  What I 
would like to do is to send a rejection note to the person and delete the 
mail without me ever having seen it.  Currently I am trying something 
like this, but it does not appear to work:

:0
     * ^From: bum(_at_)bum(_dot_)com
     | (/usr/local/bin/formail -brt ; \
       echo "Your letter was automatically rejected." ;\
       ) | $SENDMAIL -oi -t

:0B
     * ^ .* bum(_at_)bum(_dot_)com
     | (/usr/local/bin/formail -brt ; \
       echo "Your letter was automatically rejected." ;\
       ) | $SENDMAIL -oi -t


Thanks for the help!

Joe