What does this do ?

Hello,

I try to pipe my message: (mess.txt) into this file:

THISFILE < MESS.TXT

But it dosen't work:

Where THISFILE contains:

#------THISFILE
 | (formail -r -I "Subject: SESAME:   destination(_at_)yahoo(_dot_)com  014481" 
\
              -i "Received:" \
              -I "From: mylist(_at_)mydomain(_dot_)org" \
              -I "Precedence: junk" ; \
      echo ""; \
      echo "The salsa list has received your subscription request:"; \
      echo ""; \
      echo "    To:         mylist(_at_)mydomain(_dot_)org"; \
      echo "    From:       destination(_at_)yahoo(_dot_)com"; \
      echo ""; \
      echo "If you wish to subscribe to the salsa-list send us ";\
      echo "a message with the following subject:"; \
      echo "RE: SESAME: jacques_g(_at_)yahoo(_dot_)com 014481"; \
      echo ""; \
      echo "This is to prevent others to subscribe you to the Salsa
list"; \
      echo "If you wish to contact the list owner send a mail to:"; \
      echo "jacques_g(_at_)yahoo(_dot_)com"; \
     ) | /usr/lib/sendmail -t -oi -om
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