Google is offering a free holiday postcard service, sent through good old snail mail. But the catch here is they allow only one postcard per system. To use this service you don’t need a GMAIL account . You can use the service from the following address :

https://services.google.com/fb/forms/gmailholidaycard/

If you are attempting to send more than one card, you get a message which says the following:

To send more than one card from the same system, you need to clear your browser cache and cookies. With this simple hack you can send more then one card. Use this service from Google responsibly 🙂