Send a SMS using emails(free)

I have a doubt that many of you might not be aware of this method of sending SMSes. Are you aware of the fact that every time you send an sms it has to go through a gateway. So if you are aware of the email gateways you can just send an e-mail to that address and you will be able to send SMSes free of cost.

Steps:
1. Open your mail provider.
2. In the To field type in phonenumber@domain.name
3. Click here to get a list of email to sms gateways.
http://www.tech-faq.com/how-to-send-text-messages-free.html
http://www.mutube.com/projects/open-email-to-sms/gateway-list