无法使用mailer类在php中发送邮件

今天我在php中做了一些邮件处理，我发现有两种方法，一种是Php提供的简单邮件功能，另一种是我在互联网上找到的关于使用网站上的PHP邮件程序类https://github.com/PHPMailer/PHPMailer https://github.com/PHPMailer/PHPMailer。问题是我运行我的程序而不是发送邮件。我们看一下代码

<?php
include 'PHPMailer-master/class.phpmailer.php';

$mail = new PHPMailer();   // create a new object
$mail->IsSMTP();           // enable SMTP
$mail->SMTPDebug  = 1;     // debugging: 1 = errors and messages, 
                           //            2 = messages only
$mail->SMTPAuth   = true;  // authentication enabled
$mail->SMTPSecure = 'tls'; // secure transfer enabled REQUIRED for GMail

$mail->Host = "smtp.gmail.com";
$mail->Port = 465; # or 587

$mail->IsHTML(true);
$mail->Username = "[email protected] /cdn-cgi/l/email-protection";
$mail->Password = "88888*******";

$mail->SetFrom('[email protected] /cdn-cgi/l/email-protection');
$mail->AddAddress('[email protected] /cdn-cgi/l/email-protection');
$mail->Subject = "Test";
$mail->Body    = "hello";

$sendResult = $mail->Send();

if ($sendResult)
{
     echo "Message has been sent";

}
else
{
     echo "Mailer Error: " . $mail->ErrorInfo;
}

现在，当我运行此脚本时，出现以下错误：

CLIENT -> SMTP: EHLO localhost 
SMTP -> ERROR: EHLO not accepted from server: 
CLIENT -> SMTP: HELO localhost

注意：fwrite(): send of 16 bytes failed with errno=10054 现有连接被远程主机强制关闭。在 C:\xampp\htdocs\program\mailsending1\mailsending_v1\PHPMailer-master\class.smtp.php 第 1023 行

SMTP -> ERROR: HELO not accepted from server: 
SMTP -> NOTICE: EOF caught while checking if connected
SMTP Connect() failed. 
Mailer Error: SMTP Connect() failed.

将 SMTP 端口更改为 465。它应该可以工作