function sendmail($file,$mailto)
{
    $mailer =& JFactory::getMailer();
    //var_dump($mailer); exit;
    $config =&JFactory::getConfig();
    $sender = array(
        $config->getValue( 'config.mailfrom' ),
        $config->getValue( 'config.fromname' )
    );

    $mailer->setSender($sender);

    $recipient = array($mailto);
    $mailer->addRecipient($recipient);

    $body   = "Your body stringnin double quotes if you want to parse the nnewlines etc";
    $mailer->setSubject('Your subject string');
    $mailer->setBody($body);
    // Optional file attached

    $mailer->addAttachment(JPATH_BASE.DS.'CSV'.DS.$file);

    $send =&$mailer->Send();

    if ( $send !== true ) {
        echo 'Error sending email: ' . $send->message;
    } else {
        echo 'Mail sent';
    }
}

$from="noreplay@gmail.com";//Please set Proper email id
   $fromname="noreplay";
   $to ='admin@gmail.com';
   // Set a you want send email to
   $subject = "Download";
   $message = "Thank you For Downloading";
   $attachment = JPATH_BASE.'/media/demo.pdf';
   // set a file path
   $res = JFactory::getMailer()->sendMail($from, $fromname, $to,$subject,     $message,$mode=1,$cc = null, $bcc = null, $attachment);
   if($res)
   {
        $errormsg = "Mail Successfully Send";
   }
   else
   {
     $errormsg ="Mail Not Send";
   }