This website provides you with disposable e-mail addresses which expire after 15 Minutes. You can read and reply to e-mails that are sent to the temporary e-mail address within the given time frame.

Disposable Temporary E-Mail Address. Looks like a tool that spammers and phishers use. I think that it might be useful to get back at them if I want to spend the time doing so. I need to research this further.