這個方法對我有用，你可以試試這個：

1. 首先前往您的 Google 帳戶管理，然後前往安全性。
2. 確保您的兩步驟驗證已啟用。
3. 然後轉到應用程式密碼。
4. 在選擇應用程式下拉選單中選擇其他，並根據您的喜好命名。
5. 然後點擊“生成”，Google 會給您一個密碼。確保複製它並將其保存在其他地方。
6. 不要在 PHPMailer 設定中使用您的真實 Google 帳戶密碼，而是使用您剛剛產生的密碼。

如需參考，請造訪 GitHub：

[https://github.com/shahhussain305/esdn_classes][1]
  
  /*
  To use this new method of PHPMailer follow the following steps on 
  ubuntu:
Step 1: Install Composer
    $   sudo apt update
        sudo apt install php-cli unzip
    $   cd ~
    $   curl -sS https://getcomposer.org/installer -o /tmp/composer-setup.php
    $   HASH=`curl -sS https://composer.github.io/installer.sig`
    $   php -r "if (hash_file('SHA384', '/tmp/composer-setup.php') === '$HASH') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
        Output: Installer verified
    **Note**: If the output says Installer corrupt, you’ll need to repeat the download and verification process until you have a verified installer.
*   The following command will download and install Composer as a system-wide command named composer, under /usr/local/bin:
$   sudo php /tmp/composer-setup.php --install-dir=/usr/local/bin --filename=composer
Output
All settings correct for using Composer
Downloading...
Composer (version 2.3.5) successfully installed to: /usr/local/bin/composer
Use it: php /usr/local/bin/composer
To test your installation, run:
$   composer

第 2 步：前往網站根目錄並執行以下命令

$   composer require phpmailer/phpmailer
*/ 

ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;

class Communicator{ 
    /* to send emails from your registered domain / hosting email server
    private $host = "smtp.hostinger.com";
    private $userName="[email protected]";
    private $robots = array(
                        '[email protected]',
                        '[email protected]',
                        '[email protected]',
                        '[email protected]',
                        '[email protected]');
    private $password="jashdf &_isdf807%^$^sdf;_sdf*)465";
    public $from_email='[email protected]';
    */
    //----------Send Email From GMAIL SMTP Server -----------------//
    /*
     To activate sending emails from gmail, please do the following:
     1- login to your gmail account and go to the manage accounts (Top right under the user name logo)
     2- click on the security (left side menus)
     3- Activate the two step varification
     4- under the two step varification, click on the app password, click on the first dropdwon and select Custom name and Type any name like PHPMailer etc
     */
    private $host = "smtp.gmail.com";
    private $userName="[email protected]";
    private $password="ywhstefdirkdfhen";
    private $robots = array(
                        array('[email protected]','ywhstefdirkdfhen'),
                        array('[email protected]','oejrgdbeygswjhdo'),
                        array('[email protected]','poswkfhrusnfhwlv'),
                        array('[email protected]','tgfdeswavfgdertk'),
                        array('[email protected]','polkhytrdwesaqzx'),
                        array('[email protected]','okljuhbgtrdfcxse')
                        );

    public $from_email='[email protected]';
    //------------------------------------------------------//
    public $replyTo="[email protected]";
    var $tempVar;
    public $from_name = 'NAME OF YOUR ORGANIZATION';
    public $charSet = "CharSet = 'UTF-8'";
    public $charSetOpt = 0;
    //function to send email simple and with attachements
    
  public function sendEmail($to,$from,$sender_name="",$subject,$body,$attachement_path="",$cc="",$bcc=""){ 
        require '../../../../vendor/autoload.php';      
        $mail = new PHPMailer;
        $mail->IsSMTP();            // set mailer to use SMTP i.e. 
        smtp1.example.com;smtp2.example.com
        $mail->SMTPSecure = PHPMailer::ENCRYPTION_SMTPS;
        $mail->SMTPDebug = SMTP::DEBUG_SERVER;
        $mail->Host = $this->host;  // specify main and backup server
        $mail->SMTPAuth = true;     // turn on SMTP authentication
        $mail->Username = $this->userName;  // SMTP username i.e email id of an email address
        $mail->Password = $this->password; // SMTP password for the specified email address         
        $mail->Port = 587;
        $mail->SMTPSecure = 'tls';
                    if($this->charSetOpt != 0){
                       $mail->CharSet = $this->charSet;
                    }
        $mail->From = $from;
        $mail->FromName = $sender_name;
        $mail->addAddress($to);   //mail,name
        if(isset($cc) && !empty($cc)){
            $mail->addBCC($bcc);
            }
        if(isset($cc) && !empty($cc)){
            $mail->addCC($cc);
            }
        $mail->addReplyTo($this->replyTo);//to, name            
        $mail->WordWrap = 50; 
        if(isset($attachement_path) && !empty($attachement_path)){                                
        // set word wrap to 50 characters
        $mail->AddAttachment($attachement_path);  // add attachments
                }
        $mail->isHTML(true);      // set email format to HTML           
        $mail->Subject = $subject;
        $mail->Body = $body;
        //$mail->AltBody = "This is the body in plain text for non-HTML mail clients";          
        if(!$mail->send()){
            $this->tempVar = $mail->ErrorInfo;
           return false;
            }
        else{
            return true;
            }
        }
      //for multiple recipients                
      public function sendEmails($to=array(),$from,$sender_name="",$subject,$body,$attachement_path="",$cc="",$bcc=""){
        require '../../../../vendor/autoload.php';              
        $mail = new PHPMailer;
        $mail->IsSMTP();            // set mailer to use SMTP i.e. 
        smtp1.example.com;smtp2.example.com
        $mail->SMTPSecure = PHPMailer::ENCRYPTION_SMTPS;
        $mail->SMTPDebug = SMTP::DEBUG_SERVER;
        $mail->Host = $this->host;  // specify main and backup server
        $mail->SMTPAuth = true;     // turn on SMTP authentication
        $mail->Username = $this->userName;  // SMTP username i.e email id of an email address
        $mail->Password = $this->password; // SMTP password for the specified email address
        $mail->Port = 587;
        $mail->SMTPSecure = 'tls';
                    if($this->charSetOpt != 0){
                       $mail->CharSet = $this->charSet;
                    }
        $mail->From = $from;
        $mail->FromName = $sender_name;
        //$mail->addAddress($to[0]);   //mail,name
        foreach($to as $value){
            $mail->addAddress($value); 
            }
        if(isset($bcc) && !empty($bcc)){
            $mail->addBCC($bcc);
            }
        if(isset($cc) && !empty($cc)){
                $mail->addCC($cc);
            }
        //$mail->AddAddress("[email protected]");  // name is optional
        $mail->addReplyTo($this->replyTo);//to, name            
        $mail->WordWrap = 50; 
        if(isset($attachement_path) && !empty($attachement_path)){                                
        // set word wrap to 50 characters
                $mail->AddAttachment($attachement_path);         // add attachments
                //$mail->AddAttachment("/tmp/image.jpg", "new.jpg");    
        // optional name
                }
        $mail->isHTML(true);    // set email format to HTML         
        $mail->Subject = $subject;
        $mail->Body = $body;
        //$mail->AltBody = "This is the body in plain text for non-HTML mail clients";          
        if(!$mail->send()){
            $this->tempVar = $mail->ErrorInfo;
            return false;
            }
        else{
            return true;
            }
        }

       //for multiple/single recipient(s) and from random robots
       public function sendEmailRnd($to=array(),$sender_name="",$subject,$body,$attachement_path="",$cc="",$bcc=""){ 
        $this->get_email_user($this->robots);
        require '../../../../vendor/autoload.php';              
        $mail = new PHPMailer;
        $mail->IsSMTP();            // set mailer to use SMTP i.e. 
        smtp1.example.com;smtp2.example.com
        $mail->SMTPSecure = PHPMailer::ENCRYPTION_SMTPS;
        //$mail->SMTPDebug = SMTP::DEBUG_SERVER;
        $mail->Host = $this->host;  // specify main and backup server
        $mail->SMTPAuth = true;     // turn on SMTP authentication
        $mail->Username = $this->userName;  // SMTP username i.e email id of an email address
        $mail->Password = $this->password; // SMTP password for the specified email address
        $mail->Port = 587;
        $mail->SMTPSecure = 'tls';
                    if($this->charSetOpt != 0){
                       $mail->CharSet = $this->charSet;
                    }
        $mail->From = $this->userName;
        $mail->FromName = $sender_name;
        //$mail->addAddress($to[0]);   //mail,name
        foreach($to as $value){
            $mail->addAddress($value); 
            }
        if(isset($bcc) && !empty($bcc)){
            $mail->addBCC($bcc);
            }
        if(isset($cc) && !empty($cc)){
                $mail->addCC($cc);
            }
        //$mail->AddAddress("[email protected]");                  // name is optional
        $mail->addReplyTo($this->replyTo);//to, name            
        $mail->WordWrap = 50; 
        if(isset($attachement_path) && !empty($attachement_path)){                                
        // set word wrap to 50 characters
                $mail->AddAttachment($attachement_path); // add attachments
        //$mail->AddAttachment("/tmp/image.jpg", "new.jpg"); // optional name
                }
        $mail->isHTML(true);  // set email format to HTML           
        $mail->Subject = $subject;
        $mail->Body = $body;
        //$mail->AltBody = "This is the body in plain text for non-HTML mail clients";          
        if(!$mail->send()){
            $this->tempVar = $mail->ErrorInfo;
            return false;
            }
        else{
            return true;
            $this->tempVar = $from;
            }
            $mail->smtpClose();
        }                       
    private function get_email_user($robots_array=array()){
        try{
            if(is_array($robots_array) && count($robots_array) > 0){
                //get random user id with password from the $robots array
                $sender_robot_ary = $this->robots[array_rand($this->robots,1)];
                $this->userName = $sender_robot_ary[0];
                $this->password = $sender_robot_ary[1];
            }
        }catch(Exception $exc){
            $this->tempVar = $exc;
            }
        }
 
}