PHPMailer不会发送忘记用户名页面的邮件

Question

构建忘记用户名页面：

使用php文件将在localhost xampp下托管。 使用Gmail电子邮件地址将邮件发送到另一个使用用户名

的Gmail地址

没有错误，只是发送邮件。

我在包含目录中的Github中添加了以下文件。

1. PHPMailerAutoload.php，
2. class.phpmailer.php，
3. class.smtp.php，
4. class.phpmaileroauth.php，
5. class.phpmaileroauthgoogle.php，
6. class.pop3.php

然后在里面包含创建的目录＆＃34; forgot_username_inc.php＆＃34;更新 这是它的PHP代码

<?php
 include_once 'db_connect.php';
 include_once 'psl-config.php';
 require_once 'PHPMailerAutoload.php';
 require_once 'class.phpmailer.php';
 require_once 'class.smtp.php';
 require_once 'class.phpmaileroauth.php';
 require_once 'class.phpmaileroauthgoogle.php';
 require_once 'class.pop3.php';
 $error_msg_username = "";

  if (isset($_POST['email'])) {
// Sanitize and validate the data passed in
$email = filter_input(INPUT_POST, 'email', FILTER_SANITIZE_EMAIL);
$email = filter_var($email, FILTER_VALIDATE_EMAIL);

if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
    // Not a valid email
    $error_msg_username .= '<p class="error">The email address you entered 
    is not valid</p>';
}

$prep_stmt = "SELECT username FROM client WHERE email = ? LIMIT 1";
$stmt = $mysqli->prepare($prep_stmt);

  // check existing email  
  if ($stmt) {
    $stmt->bind_param('s', $email);
    $stmt->execute();
    $stmt->store_result();

    if (!($stmt->num_rows == 1)) {
        // If no user with such email
        $error_msg_username .= '<p class="error">No User Registered with that Email</p>';
                    $stmt->close();
    }      

} 

else {
    $error_msg_username .= '<p class="error">Database error Line 39</p>';
            $stmt->close();
}

  if (empty($error_msg_username)) {

  if($stmt_username = $mysqli->prepare("SELECT username FROM *** WHERE email = ? LIMIT 1")) {
   $stmt_username->bind_param('s', $email);
   $stmt_username->execute();
   $stmt_username->store_result();
   $stmt_username->bind_result($username);

   // user found
    if ($stmt_username->num_rows == 1) {
    // sending mail
        $mail = new PHPMailer;
        $mail->isSMTP();                                      // Set mailer to use SMTP
 $mail->Host = 'smtp.gmail.com';  // Specify main and backup SMTP servers
$mail->SMTPAuth = true;                               // Enable SMTP 
authentication
   $mail->Port     = 587;                    // set the SMTP port for the GMAIL 
    server
$mail->Username = 'example@gmail.com';                 // SMTP username
$mail->Password = 'password';                           // SMTP password
   $mail->SMTPSecure = 'tls';                            // Enable encryption, 
    'ssl' also accepted
  $mail->SMTPDebug = 2;
  $mail->From = 'example@gmail.com';
  $mail->FromName = 'Admin';
  $mail->addAddress($email);        // Name is optional
  $mail->WordWrap = 50;                                 // Set word wrap to 50 
 characters
   $mail->isHTML(true);                                  // Set email format to 
  HTML

 $mail->Subject = 'User Name Forgot';
 $mail->Body    = 'Here is your UserName'.$username;
 $mail->AltBody = 'Here is your UserName'.$username;

  if(!$mail->send()) {
  echo 'Message could not be sent.';
  echo 'Mailer Error: ' . $mail->ErrorInfo;
  } else {
echo 'Message has been sent';
 }
 //---End of Mail       
    } // end of userfound
   } // end of prepare statement

    if (! $stmt_username->execute()) {
            header('Location: ../error.php?err=Username Search: FAILED');
            exit();
        }
        $stmt_username->close();
    header('Location: ./forgot_username_success.php');
    exit();
}

    }
    ?>

显示错误：

  

请通过您的网络浏览器登录无法发送消息.Mailer错误：SMTP连接（）失败。 https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting

我做了什么：禁用双向身份验证。允许不太安全的应用访问。 清除浏览器缓存。我也是＃34;解锁CAPTCHA＆＃34; https://accounts.google.com/DisplayUnlockCaptcha 仍然失败。

更新 我使用GMX而不是gmail＆amp;现在它成功发送邮件。