How to Send a Text Message From Any Computer to Any Provider

1. Log in to your email account.
2. Enter the recipient's text messaging inbox address in the 'To' field of your message. The text message inbox address is the mobile phone number followed by the gateway extension. For example, the SMS gateway address for Sprint phones is mobilephonenumber@messaging.sprintpcs.com. The 10-digit phone number should be listed in place of 'mobilephonenumber.'
3. Enter the message you would like to deliver in the body of the email and click 'Send.' Your message will be delivered to the recipient's phone as a text message.