Anonymous - 2012-05-28

I can not get this to email.
I get message -  sendmail_from" not set in php.ini or custom "From:" header missing in E:\www\email\processor.php on line 11  .
I am not able to touch the php.ini
I need to do custom From.

This is the code: 

?php
$where_form_is="http://".$_SERVER['SERVER_NAME'].strrev(strstr(strrev($_SERVER['PHP_SELF']),"/"));
mail("MyEmail@somewhere.net","phpFormGenerator - Form submission","Form data:
Email: " . $_POST['field_1'] . " 
 powered by phpFormGenerator.
");
include("confirm.html");
?>

I suspect the line " powered by phpFormGenerator." I need to add header or something here?
I have tried the Form generator several times I get this same line every time I make a form.

Thank You for help in advance..