sms through teleflip and php?

["blackwater dev" <blackwaterdev@xxxxxxxxx>]

Has anyone been able to successfully send a text message using php and the
mail function?

It works fine if I open up thunderbird and send a message to
mynumber@xxxxxxxxxxxx but if I use the mail function:

mail("mynumber@xxxxxxxxxxxx", "test", "test");

It doesn't work.  I've tried several different approaches so was curious if
others have used it successfully.

Thanks!