swiftmailer时没有设置https的选项，才可以发送成功。在linux下面

<?php
$su = 'register';
$ge = '1362836763@qq.com';
$co = 'Please register!';
send_mail($su,$ge,$co);

function send_mail($subject,$getter,$content)
{
    $https['ssl']['verify_peer'] = FALSE;
    $https['ssl']['verify_peer_name'] = FALSE;
    $result = false;
    $sender = 'yourEmailName@163.com';
    $transport = Swift_SmtpTransport::newInstance('smtp.163.com', 465,'ssl')
        ->setUsername($sender)
        ->setPassword('yourEmailPassword')
        ->setStreamOptions($https);
    $mailer = Swift_Mailer::newInstance($transport);
    $message = Swift_Message::newInstance($subject)
        ->setFrom(array($sender => 'Chinese Project'))
        ->setTo($getter)
        ->setBody($content)
    ;
    $result = $mailer->send($message);
    $success = $result ? 0 : 1;
    return $result;
}