使用 smtp 和 Gmail 的 Phpmailer 无法正常工作 - 连接超时

My code is attached...did I somehow miss something? I asked the web hosting service if they're blocking and gave them a template of my code - they said the server allows connections to Gmail's SMTP.

    require_once("class.phpmailer.php");
    $mail = new PHPMailer();
    $mail -> IsSMTP();
    $mail -> SMTPDebug = 2;
    $mail -> SMTPAuth = 'true';
    $mail -> SMTPSecure = 'tls';
    $mail -> SMTPKeepAlive = true;
    $mail -> Host = 'smtp.gmail.com';
    $mail -> Port = 587;
    $mail -> IsHTML(true); 

    $mail -> Username = "myemail@gmail.com";
    $mail -> Password = "mypassword";
    $mail -> SingleTo = true; 

    $to = xxx;                           
    $from = xxx;
    $fromname = xxx;
    $subject = xxx;
    $message = xxx
    $headers = "From: $from
";
    $headers .= "MIME-Version: 1.0
";
    $headers .= "Content-type: text/html; charset=iso-8859-1
";

    $mail -> From = $from;
    $mail -> FromName = $fromname;
    $mail -> AddAddress($to);

    $mail -> Subject = $subject;
    $mail -> Body    = $message;

    if(!$mail -> Send()){
        echo "Message could not be sent. <p>";
        echo "Mailer Error: " . $mail-> ErrorInfo;
        exit;
    }

推荐答案

我研究了一下.使用 php 原生的 fsocketopen 来测试连接并消除大部分潜在问题.用这个写一个简单的php页面:

    $host = "smtp.gmail.com";
    $port = "587";
    $checkconn = fsockopen($host, $port, $errno, $errstr, 5);
    if(!$checkconn){
        echo "($errno) $errstr";
    } else {
        echo 'ok';
    }