cakephp 3电子邮件和smtp不工作

我试图从我的cakephp 3应用程序发送电子邮件。但每次它使用本地主机smtp时,我都会收到错误。

这是我的密码。

public function sendEmail($email, $subject, $message){

        // Sample SMTP configuration.
        $this->loadModel('Generalsettings');
        $query = $this->Generalsettings->find('all')->where(['meta_key' => 'smtp_details'])->applyOptions(['default' => false]);
        $smtpdetail = $query->first();
        $detail = json_decode($smtpdetail->value);
        Email::configTransport('gmail', [
            'host' => $detail['host'], //value is 'ssl://smtp.gmail.com'
            'port' => $detail['port'], //value is 465
            'username' => $detail['username'],
            'password' => $detail['password'],
            'className' => 'Smtp'
        ]);
        $emailClass = new Email();
        $emailClass->from(['er.dhimanmanoj@gmail.com' => "Sender"])
             ->to($email)
             ->subject($subject)
             ->send($message);
    }

如果我做错了什么,请告诉我提前谢谢。