how to send text messages from email

number@...

AT&T: @txt.att.net
Alltel: @message.alltel.com
Cingular: @cingularme.com
Nextel: @messaging.nextel.com
Powertel: @ptel.net
Sprint: @messaging.sprintpcs.com
SunCom: @tms.suncom.com
T-Mobile: @tmomail.net
US Cellular: @email.uscc.net
Verizon: @vtext.com
Virgin Mobile: @vmobl.com