Mastronardi Postcard Center By Mastronardi Software Welcome to the Mastronardi Postcard Center.  From here you can send a Postcard to your Friends or colleagues.  You may choose to send a postcard or, in case you received a Postcard E-mail, pick one up. This means that you can send a card with a picture you choose and add your own text or read/view the card which has been sent to you.