How to expire a link?
<blockquote>
  <p>I have an app that send a hyperlink via email to allow users to get to a certion webform...</p>
</blockquote>

<p>mmMail.Body = "http://localhost/mypage.aspx>
when a user recieves this link . Is there any way to add code to expire this link after 24 hours of user accepting the link. 
** this recieving time will be different for different users and hence my link should expire after 20 hours for the user, who recieved the link befor 24 hrs.</p>
