title: get subscriber email on "Confirmation thankyou page" mailchimp
body: <p>I am working on mailchimp.
  What I want to do is
  Get the email entered at signup page at confirmation thankyou page, Which is displayed when user click on the link in email.
  I have searched on internet but couldn't find any solution.The flow is like
  User submitted form
  User clicked on confirmation email.
  Now he is redirected to my custom thankyou page.
  <strong>How can I get his email address on this page?</strong></p>