We’ve all been there. You’re interested in a website or a download, but the site wants your email address before letting you near the goods. But what if you could instead supply a temporary email address that was forwarded to your own? And then define either a maximum number of emails to forward, or a maximum period of time for which that would happen? This would stop you from receiving spam email to your regular email account.
http://www.makeuseof.com/tag/protect-email-subscribe-check-links/