cakephp 2.8与1.3 smtp的差异会导致550错误

我们最近将一个应用程序从Cakephp 1.3更新为2.8版

我们使用该应用程序通过单独的SMTP服务器向客户发送订单信息电子邮件。一次可以发送多达1000条消息

我们的1.3应用程序用于愉快地批量发送邮件，而不会产生超过最大收件人配额550的邮件，即使是对于超过SMTP服务器上最大收件人级别的卷也是如此。SMTP服务器尚未更改。“最大收件人”级别设置为每小时500个，一如既往

Cakephp版本2有一种处理电子邮件的新方法（CakeEmail）：

CakePHP1.3和CakePHP2.8通过SMTP方法发送电子邮件的方式肯定有根本性的区别，但我真的很难看出这一点。有人能帮忙吗

相关代码如下所示

///1.3代码

$config['smtp'] = array(
        'port'=>'25',
        'timeout'=>'30',
        'host' => 'mail.smtpservername.com',
        'username'=>'smtp@domainname.com',
        'password'=>'password'
);


private function send_email($customer, $email_message) {

        $this->Email->from = 'Sender Name <address@domain.com>';
        $this->Email->smtpOptions = array(
            'port'=>Configure::read('smtp.port'),
            'timeout'=>Configure::read('smtp.timeout'),
            'host' => Configure::read('smtp.host'),
            'username'=>Configure::read('smtp.username'),
            'password'=>Configure::read('smtp.password')
        );

        $this->Email->delivery = 'smtp';
        $this->Email->to = $customer['first_name'].' '.$customer['last_name'].' <'.$customer['email_address'].'>';
        $this->Email->subject = 'A nice subject line';
        $this->Email->sendAs = 'text';
        $this->Email->template = 'simple_message';
        $this->set('email_content', $email_message);

        if (!$this->Email->send()) {
            CakeLog::write('error', "Sending email to customer {$customer['id']} failed.");
            throw new EmailNotSentException("Sending email to customer {$customer['id']} failed.\n\n".$email_message);
        }

        $this->Email->reset();
        return true;
    }

$config['smtp'] = array(
    'port'      => '25',
    'timeout'   => '30',
    'host'      => 'mail.smtpservername.com',
    'username'  => 'smtp@domainname.com',
    'password'  => 'password',
    'transport' => 'Smtp'
);

private function send_email($customer, $email_message)
    {
        $Email = new CakeEmail;
        $Email->config(Configure::read('smtp'));

        $from = array('address@domain.com' => 'Sender Name');
        $recipient = array($customer['email_address'] => $customer['first_name'] . ' ' . $customer['last_name']);
        $subject = 'A nice subject line';

        $Email->from($from);
        $Email->to($recipient);
        $Email->subject($subject);
        $Email->emailFormat('text');
        $Email->template('simple_message');
        $Email->viewVars(array('email_content' => $email_message));

        if (! $Email->send()) {
            CakeLog::write('error', "Sending email to customer {$customer['id']} failed.");
            throw new EmailNotSentException("Sending email to customer {$customer['id']} failed.\n\n".$email_message);
        }

        $Email->reset();
        return true;
    }