How can I send mass mail without spam

Question

I am working on a functionality to send mass mail on product update.I want to improve code for performance and to avoid spam.

Code:

 $collection = Mage::getModel('newsletter/subscriber')->getCollection();
 $arr = array();

   foreach ($collection as $subscriber) 
   {
      $arr[] = $subscriber->getData();
   }

    $html = '<strong>Dear Subscriber,</strong><br>
                    Following product has been updated <br><br> ';

      for($j=0;$j<count($arr);$j++)
      {
         $mail = Mage::getModel('core/email')
             ->setToName($arr[$j]['subscriber_email'])
             ->setToEmail($arr[$j]['subscriber_email'])
             ->setBody($html)
             ->setSubject('Sarees Images Collection')
             ->setFromEmail(Mage::getStoreConfig('trans_email/ident_general/email', $storeId))
             ->setFromName(Mage::app()->getStore()->getName())
             ->setType('html');
             try{

             $mail->send();
             }
             catch(Exception $error)
             {
             Mage::getSingleton('core/session')->addError($error->getMessage());
             return false;
             }
         } 

Problem:

Though mails are being sent to susbscribers it is slowing the page and there is a fear of being spammed.

How can I tackle this?

I am using Magento ver. 1.9.2.4.

Answer 1

Using the webserver where you host your website for bulk mailing is not a very good idea. Spamfilters will add you to blacklists which could eventually harm your website in unexpected ways.

If you want to send bulk emails from your magento use an Email provider instead. They have dedicated teams to stay out of spamboxes so you don't have to worry about that anymore. There are plenty free solutions like Sendgrid, Mailchimp (trough Mandrill) and Mailgun. Mailgun is developers oriented, so that might be a good choice.

Check a roundup here.