我在Ubuntu Desktop 10.04+PHP 5.3.2上使用phpmailer 5.1版的lib，並且以phpmailer examples中的test_smtp_gmail_basic.php做為範本直接修改，同時已透過phpinfo確認php_openssl及php_sockets都是enabled，gmail亦已經pop3功能給打開了。

以下為程式碼

error_reporting(E_STRICT);
date_default_timezone_set('America/Toronto');
require_once('../class.phpmailer.php');
$mail             = new PHPMailer();
$body             = file_get_contents('contents.html');
$body             = eregi_replace("[\]",'',$body);

set_time_limit(2000);//設定PHP執行時間

$mail->IsSMTP(); // telling the class to use SMTP
$mail->Host       = "smtp.gmail.com"; // SMTP server
$mail->SMTPDebug  = 1;
$mail->SMTPAuth   = true;
$mail->SMTPSecure = "ssl";
$mail->Host       = 'smtp.gmail.com';
$mail->Port       = 465;
$mail->Username   = "account@gmail.com";
$mail->Password   = "password";

$mail->SetFrom('account@gmail.com', 'account');
$mail->AddReplyTo('account@gmail.com', 'account');
$mail->Subject    = "PHPMailer Test Subject via smtp (Gmail), basic";
$mail->AltBody    = "To view the message, please use an HTML compatible email viewer!"; 
$mail->MsgHTML($body);

$address = "test@gmail.com";
$mail->AddAddress($address, "John Doe");

if(!$mail->Send()) {
        echo "<br/>mail->host:" . $mail->Host . "<br/>";
        echo "mail->port:" . $mail->Port . "<br/>";
        echo "mail->SMTPSecure:" . $mail->SMTPSecure . "<br/>";

} else {
  echo "Message sent!";
}

有試過好幾種不同的組合，ex.
remark SMTPSecure and Port then change host to 'ssl://smtp.gmail.com:465';
remark SMTPSecure and Port then change host to 'tls://smtp.gmail.com:465';
port defined to 25 enable/disabled ssl
account不帶@gmail.com
$mail->CharSet = 'utf-8';
.........
etc,.

但還是一直得到以下訊息

SMTP -> ERROR: Failed to connect to server: (0) 
SMTP Error: Could not connect to SMTP host. 

在Server中亦可以正常使用telent直接連進smtp.gmail.com

請問還有什麼地方是要注意的呢？