I had mentioned earlier about creating disposable/temporary emails using 10minutemail,gurillamail.,

Now consider Mintemail which generates unique temporary email address instantly upon each visit to the site but the email lasts only four hours. Update: Now mintemail has added a feature to set the duration of email account from 12 hours to 3 months and emai forwarding facilty.

Features overview:

1.Unique random email address will be automatically generated upon each visit to the site and copied to your clipboard so that you need not press Ctrl+C. Then you can use the email wherever you need.

2.You can also customize your email address instead of random address.

3.It instantly checks all your incoming emails and displays on the same page and what's more, you don't need to constantly refresh the page to check if your email has arrived(you can see the email notificaton on the tool bar itself).

4.You can check your emails via URL http://mintemail.com/username and it will display all the emails that are sent to username@mintemail.com.

Related: Create disposable emails