Improbable Postcards is made of perl classes which is suitable for perl websites to implement an effective postcard module. It contains templates to allow users to feed email addresses and message, to select postcard, to preview / edit prior to sending, and to confirm to send after doing required formatting. Supports BDF type of fonts with text fields instead of HTML. Gif, jpg or png formatted pictures can be included with postcards. You can understand it's functions with the help of online working examples.