没有连接就调用了Mail()

我正在尝试使用PHPMailer在Yii中发送电子邮件。我在一个实时服务器上工作。以下是我在Yii's main.php中的电子邮件配置:

'Smtpmail' => array(
            'class' => 'application.extensions.smtpmail.PHPMailer',
            'Mailer' => 'smtp',
            'SMTPAuth' => true,
        ),

下面是我得到的错误:

以下From地址失败:noreply@mywebsite.com:呼叫未连接的邮件()

这是我的控制器代码:

$mail->IsHTML(true);
$mail->From = Yii::app()->params['adminEmail'];
$mail->FromName = empty($_POST['EmailForm']["from_name"]) 
Yii::app()->params['emailFrom'] : $_POST['EmailForm']["from_name"];
$mail->Subject = $subject;
$mail->Body = nl2br($message) . $mail->Body;
$mail->AddAddress($to);
$mail->AddCC($cc);
if (!$mail->Send()) {
    Yii::app()->user->setFlash('error', $mail->ErrorInfo);
    $this->redirect(array('update', 'id' => $id));
} 
else {
      Yii::app()->user->setFlash('success', "Email sent successfully!");
      $this->redirect(array('update', 'id' => $id));
}

帮忙吗?