add_action( 'phpmailer_init', 'wpse8170_phpmailer_init' );
function wpse8170_phpmailer_init( PHPMailer $phpmailer ) {
    $phpmailer->Host = 'godadysmtpsampledomain.secureserver.net';
    $phpmailer->Port = 465; // could be different
    $phpmailer->Username = 'sender@mysite.com'; // if required
    $phpmailer->Password = '12345'; // if required
    $phpmailer->SMTPAuth = true; // if required
    $phpmailer->SMTPSecure = 'ssl'; // enable if required, 'tls' is another possible value

    $phpmailer->IsSMTP();

}
// This code works fine;
wp_mail("hossein@mydomain.net", "test", "test");
?>