getting rid of the body of an e-mail

Hi folks,

A part of my .procmailrc file is shown below.  I am trying to generate an
acknowledgement message when somebody sends a message to 
user1(_at_)foo(_dot_)com
(other ids in the same domain have different recipes). "HdrLine" is a file
containing the from line and "AutoMsg" is a file containing the canned
message which goes back to the sender. 

The problem is that the return message contains the complete text of the
original message.  Shouldn't the "h" flag pipe only the headers?  What am
I overlooking? 

:0 hc
* ^To:(_dot_)*user1(_at_)foo(_dot_)com
{
   MAILDIR=$HOME/fileserver
   :0 fhw 
   | formail -rA "X-Loop: Processed_Mail"
   :0 a
   | cat ./HdrLine - ./AutoMsg >&1 | $SENDMAIL -oi -t
}

Thanks,
Das
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