How to Send SMS Through a Gateway

1. Look up the email domain/gateway for the recipient's service provider. This should be easy to find on the internet. Google Tutor has a list of them for common U.S. cell phone service providers.
2. Open your email program.
3. Write out the person's phone number into the send box. The first part consists of phone number, and the second part, following the '@' symbol, is the gateway specific to service provider. For example, a T-Mobile user with the number (555) 123-4567 has an email of 5551234567@tmomail.net.
4. Write the content of the message.
5. Click send.