AT&T web site pointed that a SMS message can be sent from yahoo or gmail via following format: 10digitphonenumber@txt.att.net But it does not work on my iphone (my yahoo mail complain about "can not delivery". Am I missing something or above instruction is in-correct. Please help!!!! Thanks a lot.
I don't know why it doesn't work for you. It worked for me when I used it...but now I have unlimited txt messaging on my plan
http://toolbar.google.com/send/sms/index.php Been using this to send SMS to phones for some time. Works consistently since it's google. Also you can download it as a Firefox plugin.