as follows too:
$t_email_data = new EmailData;
$t_email_data->email = config_get_global( 'administrator_email' );
$t_email_data->subject = 'Testing PHP mail() function';
$t_email_data->body = 'Your PHP mail settings appear to be correctly set.';
$t_email_data->metadata['priority'] = config_get( 'mail_priority' ); $t_email_data->metadata['charset'] = lang_get( 'charset', lang_get_current() );
$result = email_send($t_email_data);

I've used Riceball's patch and also updated the text before the form since it was still referring to the mail() function.