Email to Text Messaging
Sending an email to the following addresses gives you a Free way to send a Text Message (SMS) to a cellular phone, or a convenient way to send Text Messages without leaving your computer. You only need to know the recipient's phone number. If you don't know their wireless carrier you can look it up here. Replies should return to you by email.

• Alltel
  (Most Alltel customers have been switched to Verizon or AT&T)
  [10-digit phone number]@message.alltel.com
  ex: 1234567890@message.alltel.com
  
  
• AT&T
  [10-digit phone number]@txt.att.net
  [10-digit phone number]@mms.att.net (Picture Messaging)
  [10-digit phone number]@cingularme.com
  ex: 1234567890@txt.att.net
  
  
• Nextel
  [10-digit telephone number]@messaging.nextel.com
  ex: 1234567890@messaging.nextel.com
  
  
• Sprint
  [10-digit phone number]@messaging.sprintpcs.com
  [10-digit phone number]@pm.sprint.com (Picture Messaging)
  ex: 1234567890@messaging.sprintpcs.com

• T-Mobile
  [10-digit phone number]@tmomail.net
  ex: 1234567890@tmomail.net
  
  
• US Cellular
  [10-digit phone number]@email.uscc.net
  [10-digit phone number]@mms.uscc.net (Picture Messaging)
  ex: 1234567890@email.uscc.net
  
  
• Verizon
  [10-digit phone number]@vtext.com
  [10-digit phone number]@vzwpix.com (Picture Messaging)
  ex: 1234567890@vtext.com
  
  
• Virgin Mobile USA
  [10-digit phone number]@vmobl.com
  ex: 1234567890@vmobl.com
  
  
• Other Cellular Services
  If your phone is provided by an MVNO, prepaid service or wireless reseller, you need to determine the underlying carrier, and use that carriers' email access.