I'd be a bit concerned about patent issues with this one. There's a company that, on the surface, already does this. Here's a link: http://www.bigstring.com/f

I'd be a bit concerned about patent issues with this one. There's a company that, on the surface, already does this. Here's a link: http://www.bigstring.com/free-email-address/aboutsecureemailv2.php http://www.bigstring.com/free-email-address/aboutsecureemail... From their site: "BigString Corporation (OTCBB: BSGC) has created a revolutionary new email service that allows users to control their sent email. The Company’s BigString product is an email service for both individuals and businesses that is recallable and changeable. With a patent pending technology, BigString allows a user to easily send, recall, erase, self-destruct and modify an email after it has been sent."