iPhone e-mail address for SMS?

[alra111]

What is the e-mail address to send an SMS text message to an iPhone number?

For example, with Sprint, it's 1234567890@messaging.sprintpcs.com.

Thanks,
Alra111

 

[mdnky]

5553331111@txt.att.net

or

5553331111@mobile.mycingular.com

 

[ScottW]

Mine is:

9135551212@cingularME.com