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Instalamos dependencias

  sudo apt-get install spamassassin spamc

Configuramos el daemon **sudo nano /etc/default/spamassassin**

  ENABLED=1

Configuramos SpamAssassin **sudo nano /etc/spamassassin/local.cf**

  report_safe 0
  rewrite_header Subject *****SPAM*****

Lo iniciamos

  sudo service spamassassin restart

Configuramos PostFix con **sudo nano /etc/postfix/master.cf** añadiendo al final

  # SpamAssassin
  spamassassin unix -     n       n       -       -       pipe
    user=debian-spamd argv=/usr/bin/spamc -f -e
    /usr/sbin/sendmail -oi -f ${sender} ${recipient}

y modificando al principio

  smtp      inet  n       -       -       -       -       smtpd
    -o content_filter=spamassassin
    -o receive_override_options=no_address_mappings

Reiniciamos Postfix para aplicar los cambios con **sudo service postfix restart**

Configuramos Sieve para que mueva las cabeceras de SpamAssassin con **sudo nano /var/lib/dovecot/sieve/default.sieve**


  require ["fileinto"];
  # Move spam to Junk folder
  if header :contains "Subject" "*****SPAM*****"
  {
          fileinto "Correo electrónico no deseado";
          stop;
  }

Para aprendizaje (de la carpeta de Correo electrónico no deseado), y actualización de BD, metemos en **sudo crontab -e**

  # Aprender nuevo SPAM y actualizar BD
  10      *       *       *       *       /usr/bin/sa-learn --spam --progress /home/vmail/*/*/.*no*deseado/*/*
  0       2       *       *       *       /usr/bin/sa-update && /etc/init.d/spamassassin reload