Preprocessing mail

Hi there,

How can I preprocess a email message before sendmail send via smtp... for
example: copy the mail to an txt file, include message footer...

any idea will be welcome.

thanks.
     Matheus M. Soares <matheus(_dot_)soares(_at_)galena(_dot_)com(_dot_)br>
      Suporte Técnico
      Departamento de Informática

      GALENA Química e Farmacêutica Ltda.
      http://www.galena.com.br - (19) 3746.7724