Google Voice supports sending and receiving free sms, but the disadvantage is that you don’t get any notifications when you receive one. This can be solved by using an oper source web based service called as GVMax. IT handles this issue by giving SMS support into email and IM which can then be used on your smart phone.

The service essentially allows you to send and receive sms using either email or Gtalk, and not only that , you can also get return notifications for new sms to be pushed to your mobile/

This is achieved through Google voice’s feature sms to email. All you need to do in login with your username and password and the service will make the required filters so that you can get your messages. You also have the option whether to or not to receive push notification to be sent your mobile.