title: Magento add random string to email subject
body: <p>When I receive emails from my magento carts contact form Gmail has a habit of combining them in a thread because they have the same subject.</p>
  
  <p>Does anyone know how I could add a random string of numbers to the subject line to prevent this?</p>
  
  <p>(I know I can turn this feature off in Gmail but I like it for my other emails).</p>
  
  <p>Thanks!</p>