由於AWS的SES找不到原因被暫停使用之後改用gmail

1.先把安全性降低https://myaccount.google.com/lesssecureapps?pli=1
否則在phpmailer寄信前登入會被擋掉
2.寫入phpmailer

 $mail = new PHPMailer(true);
        //Server settings
        $mail->SMTPDebug = 0;    
        $mail->isSMTP(); 
        $mail->Host       = 'smtp.gmail.com';//gmail的smtp網址
        $mail->SMTPAuth   = true;                                 
        $mail->Username   = '信箱帳號';        
        $mail->Password   = '信箱密碼';
        $mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS; 
        $mail->Port       = 587; //gmail的port
        $mail->CharSet = 'utf8';
    
        //Recipients
        $mail->setFrom('輸入信箱', 'Yan二手書店');//寄信信箱