title: Email tracking without embed image in email system
body: <p>I am developing an application using Rails, there I need to track whether or not recipient read the sent mail. Basically I did this using embed image in email(html). </p>
  
  <p>But due to image blocking in gmail I can't able to track it, in yahoo there I can see a link "show image" when user <strong>clicks on that link</strong> then I can track the details, but It shouldn't be like this, <strong>without clicking on that link we need to track</strong>.</p>
  
  <p><strong>So I need a functionality similar to this, without using embed image, just when user reads the email I need to get notified.</strong></p>
  
  <p>Thanks in advance</p>