Siva's blog

Does your Inbox is filled with Junk Mail after registering to any website?  Over 82% to 90% of the mail sent in a day are reported Spam. You may see a number of email every day in your account which is a live example . If you need an alternative email to be used while registration are using disposable mail. It also reminds me of free disposable email that was provided by Yahoo ! but it has been stopped for some reasons.
These Free Disposable emails  expires after certain time. There are hundreds of Free disposable email service, Among them, few awesome sites are
www.mailinator.com
www.dispostable.com
www.YopMail.com
These services does not need any registration , it is completely free.

Added Thrust : You can also use Bugmenot to bypass compulsory Registration.