[WEBDEV 12] Sending Email in PHP?

//Function to Send out Email
function Send_Email($sFrEmail, $sToEmail,$sSubject, $sSMTP, $sContent)
{
        $content_type = "text/plain";
        $to=$sToEmail;
         /* additional headers */
        $headers = "From: " . str_replace(";", ",", $sFrEmail) . "\r\n";
        /* and now mail it */
        if (strtolower(substr(PHP_OS, 0, 3)) === 'win') {
                ini_set("SMTP",$sSMTP);
                //ini_set("smtp_port",$sSMTPSERVER_PORT);
        }
        ini_set("sendmail_from",$sFrEmail);
        if (!mail($to, $sSubject, $sContent, $headers)) {
                ExitError("Er is een fout opgetreden bij het versturen van mail aan " . $sToEmail);
        } else {
                return true;
        }
}