In Feburary 2016 20,
Open your Outlook email client from your computer's desktop. You can also Outlook by clicking the 'Start' button and selecting 'Microsoft Outlook' from the menu.
Click 'New E-Mail' and a blank email message will open.
Enter the recipient's AT&T mobile email address. The mobile email address will be their 10-digit phone number followed by '@txt.att.net.' An example address would be 1234567890@txt.att.net.
Enter the text message in the body of the email. You can also enter a subject in the field indicated if desired.
Click 'Send' and the recipient will receive your text message within seconds.
In Feburary 2016 20,