To send a text message from your computer to someone's cell phone, do the following.
1. For example, if you want to send a text message to someone using Verizon, and their cell phone number is 555-555-5555. You
open a new email message and in the " To " field type firstname.lastname@example.org You don't put any
dashes in the cell number, just the digits.
2. Tab to the subject field and put in a subject line.
3. Tab to the edit field and put in your message. Then send as usual.
They receive the email as a text message. When they reply it comes back to you as an email. Here is how you obtain the email suffixes you add to the cell phone number.
Type the ten digit phone number in the search box, Enter on the search button and the proper sms gateway beginning with the ten digit phone number will be displayed.