====== Postfix ======

Diffie-Hellmann Parameter erstellen

  openssl dhparam -out /etc/postfix/dh_512.pem -2 512
  openssl dhparam -out /etc/postfix/dh_2048.pem -2 2048
  
  chmod 400 /etc/postfix/dh_512.pem
  chmod 400 /etc/postfix/dh_2048.pem